Katalog DIAMOND CONTACT s.r.o.
Transkript
Katalog DIAMOND CONTACT s.r.o.
2008/2009 DIAMOND AND CBN Grinding wheels StandarD line D iamond C on tac t s. r. o. Dear Business Partners We would like to introduce you to Diamond Contact Ltd and its product catalogue. The company was established in 1992 and became Diamond Contact Ltd in 1995. D iamond C on tac t s. r. o. CONTENTS: Shape overview ................................................. page 4 1. Introduction ............................................... page 6 2. Diamond grinding wheels ............................. page 6 3. CBN grinding wheels .................................... page 6 4. Basic specifications of grinding wheels ........... page 7 5. Shapes of grinding wheels ............................ page 8 6. Dimensions of grinding wheels ...................... page 10 7. Abrasive material ........................................ page 12 8. Grain size .................................................. page 12 9. Bonds ....................................................... page 13 10. Concentration ............................................. page 14 11. Machinery requirements .............................. page 15 12. Wheels clamping ........................................ page 15 13. Operating conditions ................................... page 16 14. Cooling ..................................................... page 17 15. Work safety ................................................ page 17 16. Care ......................................................... page 18 17. Storage ..................................................... page 19 18. Waste disposal ........................................... page 19 Speed conversion table ...................................... page 20 Dimensions tables .............................................. page 22 Other products as listed in separate catalogues: ■ ■ ■ ■ ■ ■ ■ Diamond and CBN grinding wheels for woodworking industries Since the start we focused on production of custom grinding wheels, chiefly wheels with resin bonding compounds which work on the basis of very hard abrasives i.e. diamond and CBN (cubic boron nitride). We focused on grinding wheels that are used mostly in the manufacture and sharpening of tools made of traditional tool materials and in engineering. Through manufacturing and supplying the above mentioned products we gravitated towards products for dressing and maintaining of classical abrasive grinding wheels. This is the reason why our company manufactures and supplies several types of diamond dressers. Great interest of our customers in the purchasing of CBN mounted points within vitrious bonding compound led us to create a new line of products. We further improved our range of goods with the introduction of electroplated tools. Custom made tools allow us speedy production, variability and ‘manufacture made to measure’ products that meet our customers’ requirements. In this case ‘custom made’ does not necessarily mean higher prices, as is usual with other goods. Situation in our trade is quite different. Combinations of various shapes, sizes, grade, bonding compounds and concentrations of abrasive materials for tools together with repeated requests of our customers to modify tools further creates a perfectly diverse selection. The only downside of custom production is the fact that mass production is nearly impossible, however, the requirements for storing of finished product are non-existent and so is the financial expense. This brings about a clear advantage to the customer. Together with all the advantages of custom made items (great choice, flexibility, good quality and personal approach) we are able to achieve excellent prices. The great variation of types and sizes of grinding wheels is ensured by our ingenious kit of press moulds. Usage of more universal shapes of dural bearing bodies and of course by the specialist knowledge and experience of our employees. We believe our company gained a recognised position amongst other tool manufacturers. We wish to provide tools that are reliable and will serve to your satisfaction. Electroplated diamond and CBN grinding wheels CBN mounted points in vitrious bond Diamond dressers Hand diamond needlepoint files Diamond pastes Synthetic diamond powder Service and repairs of grinding wheels and dressers Management of DIAMOND CONTACT s.r.o. Overview of Basic Shapes 1A1 1A 1 R-SAW page 22 page 23 3A1 14A1 1 A1W page 24 page 26 1C9 1U1 page 27 page 27 1V1 3 V1 14 V1 page 28 page 29 1E1 3 E1 14E1 page 30 page 31 1F1 3 F1 14F1 page 32 page 33 6A2 6 A9 page 34 page 36 9A3 11 A2 page 37 page 38 12A2-45 12 A2-20 page 40 page 42 D iamond C on tac t s. r. o. 11A9 12A9 11 C9 page 44 page 45 12C9-45 12 C9-20 page 45 page 46 12R4 11 V9 page 47 page 48 1 2 V9 4 A2 page 48 page 50 4B2 4 C9 page 52 page 53 4V2 4 V4 page 54 page 55 4V5 4BT9 page 56 page 57 4ET9 Hand Lap page 57 page 58 1. INTRODUCTION This catalogue is introducing the basic types of diamond and cubic boron nitride (CBN) grinding wheels that are used in engineering and in related industries applications. Shape and size lines of tools are composed in regards to the custom manufacturing in such a way that enables the greatest amount of variations and combinations. In case you have the smallest concern when choosing your optimal tool do not hesitate to contact us, we would be happy to help you with the specification of the tool. For reasons of keeping the catalogue clearly presented we did not include tools that are made seldom or intended only for a narrow circle of users. These tools are presented in focused appendices 2. DIAMOND GRINDING WHEELS Diamond is a form of pure carbon that crystallizes in cubic system. It is the hardest material available to man. Since the 50’s, synthetic diamond is used in grinding tools, which nowadays in many cases has even better physical characteristics than its natural equivalent. Diamond grinding wheels are intended for grinding of hard materials (materials with short or fine spall); in engineering for the following operations. Examples: ■ ■ ■ ■ ■ Manufacture of parts from sintered carbide, ceramic, glass and similar materials. Finishing of abrasion or temperature resistant surface films, mainly on the basis of ceramics. Manufacture and sharpening of tools with incorporated sintered carbide cutting edges. Manufacture and sharpening of solid sintered carbide tools. Grinding of sintered carbide moulds or dies. Diamond grinding wheels are not intended for finishing of steels including tool steel. The grinding surface can become clogged with the grinded material which sticks to the abrasive surface. Heat is generated as the steel is ground by the diamond grains and causes a chemical reaction that carbonises the grinded object (the carbon to iron affinity). The change within this layer causes its fragility. 3. CBN GRINDING WHEELS Cubic boron nitride (CBN) is a material that is relatively new and has no equivalent in nature. It has many nearly identical characters to diamond, however, slightly lesser hardness but much higher heat resistance (1200 °C and more) and chemical stability – it is inert towards iron. CBN’s main advantage is that it does not influence the composition of the surface layer of the grinded materials and the finished material does not stick readily to the surface as it would with diamond. CBN grinding wheels are intended for grinding heat processed steel with minimal hardness of 56 HRC, mainly high-speed steel, tool steel with high content of alloying compounds that heighten hardness, some welding materials – stellite, sintered steel, hardened cast irons etc Characteristic applications examples: ■ ■ ■ ■ ■ ■ Manufacture and sharpening of tools with incorporated high-speed steel cutting edges. Manufacture and sharpening of tools made completely of high-speed steel. Manufacture and sharpening of tools with stellite welded cutting edges. Manufacture of moulds and stamping tools made of tool steel. Finishing of cast iron parts. Manufacture of ball bearings, some car parts, etc. D iamond C on tac t s. r. o. CBN grinding wheels are not intended for grinding of soft, non-heat processed steel. Not only this could cause easier clogging up by the grinded material but also its usage would not be economical in comparison with abrasives classically used for these purposes (corundum, sillicium carbide). Similarly the application of CBN is not technologically and financially effective when grinding hard tool materials which could be finished using diamond grinding wheels. 4. BASIC CHARACTERISTICS OF GRINDING WHEELS Characteristics of diamond and CBN grinding wheels are given by basic technological parameters, by itemising these, the wheel should be fully specified. When ordering grinding wheels the following parameters should be indicated. In compliance with the EU standard EN 13236 the parameters are stamped on each grinding wheel or its wrap. These parameters are as follows: shape and basic dimensions of the grinding wheel, type, grade and concentration of abrasive, type of bonding compound. 5 ks 4A2 100-10-2-20 D151 RD 100 concentration bond dimensions shape (FEPA) number of pieces abrasive grain size Specifications are always shown on the wrap and in most cases on the wheel itself, together with the type of abrasive, logo of the manufacturer, serial number and restrictions on surface speed. A - colour identification of the abrasive blue – diamond red – CBN B - logo of manufacturer or supplier C - type of grinding wheel D - serial number E - restrictions on surface speed 5. SHAPES OF GRINDING WHEELS Shape and size are the main criteria to follow when choosing a grinding wheel. The usability of the grinding wheel for any given type of machinery and its technological parameters depend upon the correct choice as well as the type of technological application. The right selection of shape and size can greatly lower the financial requirements connected with the purchase of a grinding wheel and heighten the efficiency from the point of view concerning even wear. Basic shapes of grinding wheels are listed and periodically updated in the manufacturing catalogue. Branding of the shapes is adjusted to EN 13236:2001 standard. Custom made grinding wheels can also be branded differently, by the number of a technical drawing for example. Shapes of grinding wheels are coded by an alphanumerical code made up of four components as follows: ■ ■ ■ ■ Shape of the bearing body (first number) Shape of the abrasive layer (second letter) Positioning of the abrasive layer (third number) Possible other - supplementary information specifying modification (fourth letter) Example of coding the shape of a grinding wheel: For completion of information we will show the method of indicating the shape of a grinding wheel: I. Core shapes and designations: Identification Shape Identification 1 9 2 11 3 12 4 14 6 15 Shape D iamond C on tac t s. r. o. II. Shape of the superabrasive section and its designation: Identification Shape Identification Shape Identification A FF P AH G Q B H QQ C CH R D J S DD K U E L V EE LL Y F M Shape III. Location and designation: Identification Shape 1 Identification Shape 6 periphery 2 part of periphery 7 one side 3 part of side 8 both sides 4 throughout 9 inside bevel or arc 5 corner 10 outside bevel or arc annular IV. Modification and designation: Identification Shape Identification B Shape S drill and counterbore segmented diamond sections C SS drill and countersink segmented and slotted H T plain hole threaded holes M V holes plain and threaded superabrasive inverted P W on shaft relieved one side Q Y superabrasive inserted superabrasive inserted and inverted R relieved two sides 6. dimensions OF GRINDING WHEELS Dimensions of grinding wheels are stated in catalogue tables together with their respective shapes. Bearing in mind that due to custom manufacture some sizes range from smallest and greatest valuation we state the optimum sizes (i.e. sizes that are tried and tested and most commonly used). We are able to manufacture products with sizes outside the scope of the table values after an agreement with the customer. The itemisation of size marking for the grinding wheels is as follows: Labelling of grinding wheel dimensions: Identification Description Identification Description D Outside diameter Y Clamping diameter of the shank E Thickness of the clamping part T Overall thickness H Bore diameter in tolerance H7 U Thickness of superabrasive section J Smallest diameter of trapered wheel V Angle of abrasive section K Internal diameter of recess on trapered wheel W Rim width R Radius X Depth of superabrasive section L Overall length of the shanked tool L1 Length of the shank neck Selecting the correct diameter of a grinding wheel needs to reflect the parameters of the work piece, and in the case of constant working revolutions of a grinding machine shaft the prescribed optimal cutting speed of a grinding wheel has to be taken into consideration. The whole width of the grinding wheel’s abrasive layer should be used 10 D iamond C on tac t s. r. o. equally when grinding. This can be achieved by the correct selection of abrasive layer width together with optimal oscillation value of the grinding wheel, as shown by the picture: correct wrong Narrow layers enable higher grinding output with lesser rise in temperature but can transfer the machine’s vibrations to the surface of the work-piece more easily. By selecting a wider layer it is possible to achieve quieter grinding, however, the output will be lowered and the cutting resistance and temperature will rise. The thickness of the abrasive layer can influence the expense, it is however necessary to choose correctly as to prevent deformation and attrition on the bearing body of the grinding wheel when grinding tools with more than one cutting edge or with narrow distances between the cutting edges. This is a fault that happens inconspicuously over time and can cause substantial damage to the abrasive layer. In this case it is necessary to choose a different shape or size of the grinding wheel. impending collision when drifting impending collision when rebounding 7. ABRASIVE MATERIAL Abrasives used in our tools are synthetic diamond or CBN. We have several types of grains with different shapes and strengths. In most cases we use electroplated grains with coating of nickel, copper and occasionally titanium. In some cases we use abrasives without coating or in combinations. The exact characteristics of the abrasive alone are very closely related with bonding compounds used for specific technological application of the tool; for this reason we do not refer to abrasive characteristics as such but always in combination with the characteristics of the bonding compound. Generalised comparison of abrasive materials: Parameter CBN Identification: B (BB) Specific weight: Mohs scale: Temperature tolerance limit: Toughness: Main areas of use: Diamond D 3.58 g/cm 3.52 g/cm3 9.6 10 1200 °C 800 °C more tenacious more fragile HSS, hardened steels and cast iron SK, ceramics, glass, stone 3 BB is code referring to CBN of specific type intended for use in performance grinding. 11 Applications of abrasive materials: Grinded material High-speed steel (HSS) Hardened steel (above 56 HRC) Case-hardened steel High alloy steels Cast iron (white, hardened, etc.) Heat resistant materials Sintered carbide, cermet Ceramics, glass and porcelain Stone, precious stone and semiprecious stone Stellite, polycrystalline diamond Graphite, sillicium (Si) Composites (glass array, etc.) CBN Diamond ■ ■ ■ ■ ■ - ■ ■ ■ ■ ■ ■ ■ 8. Grain size Grain size of the used abrasive directly influences the coarseness of the grinded object and also the removal ability of the grinding wheel. Identification of grain size is marked according to the standard ISO 6106 (FEPA). The following table of grain size grading states other equivalent grading for comparison reasons. Overview of grain sizes: FEPA standard (ISO 6106) Diamond CBN US Standard (ASTM-E-11-70) Grain size in mm FEPA standard (ISO 6106) Grain size in mm D 711 B 711 25/30 630/500 D 35 40/32 D 601 B 601 30/35 630/500 D 25 32/28 D 501 B 501 35/40 500/400 D 20 28/20 D 426 B 426 40/45 400/315 D 15 20/14 D 356 B 356 45/50 400/315 D 10 14/10 D 301 B 301 50/60 315/250 D6 10/7 D 251 B 251 60/70 250/200 D2 7/2 D 213 B 213 70/80 200/160 D 181 B 181 80/100 200/160 D 151 B 151 100/120 160/125 D 126 B 126 120/140 125/100 D 107 B 107 140/170 100/80 D 91 B 91 170/200 100/80 D 76 B 76 200/230 80/63 D 64 B 64 230/270 63/50 D 54 B 54 270/325 50/40 D 46 B 46 325/400 50/40 12 D iamond C on tac t s. r. o. The relation of grain size of a grinding wheel and the coarseness it can produce on grinded surfaces: Grain size Diamond CBN D 213 B 251 D 181 B 213 D 151 B 181 D 126 B 151 D 107 B 126 D 91 B 107 D 76 B 91 D 64 B 76 D 54 B 64 D 46 B 54 D 40 B 46 D 35 - D 30 - D 25 - D 20 - D 15 - D 10 - D7 - D6 - Application Surface roughness Ra Grinding and rough cutting with the emphasis on very high performance 1.2 Grinding and rough cutting 0.8 Medium grinding and sharpening of cutting tools 0.4 Finishing of grinding 0.2 Lapping and fine grinding 0.1 Polishing 0.08 Fine polishing 0.05 Very fine polishing 0.025 The values of surface roughness in Ra are meant only as benchmark values, the roughness of the surface is influenced by other factors, mainly by the operating conditions of the grinding wheels, the condition of the machinery and the concentration of abrasives etc. 9. bonds A bonding compound together with abrasives makes up the abrasive layer. Our company manufactures majority of grinding wheels with the use of resinous (phenolic) bonding compounds; we use other bonds only in some cases (these are: special polymeric or metallic bonding compounds). CBN mounted points are also manufactured using vitrious bonds. In addition to these we supply some types, mainly function form tools, which use a electroplating technique, where the bond is created by nickel deposited during the galvanisation process. Some types of bonding compounds require cooling. The complete identification of the type of bonding compound adheres to the following example. The first letter always identifies the bonding compound type – phenolic (R), polymeric (P), vitrious (V) and galvanic (Ni). Some bonding compounds which require cooling when in use are identified on the end by the letter W. On the other hand, bonding compounds that have proven to be appropriate for dry grinding are identified by the letter D. For clarification the following table lists bonding compounds together with the suitable type of grinding: 13 Main types of bonds: Identification Type of grinding Use Hardness Cooling RB3D medium and rough narrower abrasive layers higher RB4D fine to rough wider abrasive layers medium RB5D medium and rough grinding by the rim high RX3D fine to rough wider abrasive layers medium fine to rough wider abrasive layers lower very fine special use very low RB2W medium and rough universal medium RB5W medium and rough production grinding high RB7W medium and rough production grinding very high RX2W fine to rough soft grinding lower medium and rough selected types of wheels very high fine and medium CBN for grinding bores high universal CBN for grinding bores medium fine and medium CBN for grinding bores lower medium and rough special and form tools very high ■ ■ ■ ■ ■ ■ ■ RX4D RM1D P2C Type of bond phenolic polymeric V5 V2 vitrious V3 Ni electroplated 10. CONCENTRATION Concentration of abrasive material is the relationship of the weight of abrasive to the volume of abrasive layer; it is stated as per cent. The base of representation, i.e. 100% regarded relationship is such where 1 cm3 contains 0.88 g (4.4ctr) of abrasive. Overview of concentrations: Concentration Volume (g/cm ) (crt/cm ) 25 0.22 1.1 50 0.44 2.2 75 0.66 3.3 100 0.88 4.4 125 1.10 5.5 150 1.32 6.6 200 1.76 8.8 3 3 Degree of concentration low medium high very high Use polishing (rarely) very fine grinding common grinding grinding by the rim special cases only electroplated tools Low concentrations support self-sharpening abilities of a grinding wheel and lower the generation of heat, however, the longevity of the abrasive layer and stability of its shape is also lowered and the roughness of the surface increases. Medium concentrations contain optimal amount of abrasive which are suitable for the majority of technological operations. High concentrations heighten the longevity and the stable shape of a grinding wheel, the generation of heat when grinding also rises and the self-sharpening abilities drop. 14 D iamond C on tac t s. r. o. 11. MACHINERY REQUIREMENTS The use of a diamond and CBN grinding wheels requires a superior technological condition of machinery than is necessary when using classical vitrious grinding wheels (i.e. on the basis of corundum or sintered silica). The machinery must be appropriately rigid, without vibrations, the grinding shaft must not show both radial and axial shimmy higher than 0.005mm. The work-piece fixing mechanism must be rigid enough as to prevent vibrations when grinding. Any breach of these requirements can have a negative influence upon the longevity of the grinding wheel, the roughness of the grinded surface, execution of the grinding and the evenness of wear. 12. WHEELS clamping Grinding wheel is fixed to the spur or the flange of the grinding machine. It is appropriate to use a dial gauge to measure its radial and axial shimmy when fixing the grinding wheel to the machine. By turning the spur slowly it is possible to find a position in which the measured quantities are at their lowest; fix the grinding wheel in this position and repeat the measurement. The working surface of the grinding wheel should be in geometrical allowance towards the axis of the rotation. Allowance in this case means combined allowance i.e. the total of allowances of all conformations (straightness, planeness, orbicularity, cylindricity). The optimal values for the allowance are stated by the following table. It is also necessary to consider the fixing of the grinded material and the grade of the grinding wheel. Shape tolerancing: Grain size FEPA Mechanical fixing Hand held with the use of an arm rest Main work surface Ancillary work surface Main work surface Ancillary work surface D 7 - D 20 0.005 0.01 0.01 0.02 D 25 - D54 0.01 0.02 0.02 0.03 D 64 - D 126 0.02 0.03 0.03 0.04 D 151 - D 251 0.03 0.04 0.04 0.05 Seating of a grinding wheel on the centring part of the clamping component should be clearance fit (H7/g6). We recommend, if at all possible, to refrain from removing the grinding wheel from its position on the spur or flange during all of its lifetime. It is necessary to fix a grinding wheel to the seating face of the flange with the branding facing outwardly. If required by the customer we can place the branding in such a way as not to obstruct reverse fixing. We recommend statically balancing grinding wheels that are fixed by a collar with balancing points. 15 13. OPERATING CONDITIONS When determining the best operating conditions for a grinding wheel it is necessary to bear in mind the information which accounts for the type of grinded material; its mechanical characteristics, the method of grinding, required values of the work-piece, the parameters of the machinery, time restrictions etc. This is the main reason why the operating conditions can be stated only as a rough guide for the most common types of grinding. The following table states values of operating conditions for the use of medium grades and abrasive concentrations for the main types of grinding. Surface speed of diamond and CBN grinding wheels according to the type of bonding compound in m/s: Abrasive Bond Diamond RB2W RB4W RB5W Grinding with cooling Grinding without cooling Surface Deep 25 - 40 25 - 40 25 - 35 - - 18 - 35 - 25 - 40 25 - 40 - - RB7W RX2W RB3D RB4D RB5D 14 - 20 RX3D RX4D P2C CBN RB2W RB3W RB4W RB5W RB3D 14 - 20 RB4D 14 - 25 RX3D RX4D V5 V3 V2 25 - 35 - 14 - 20 20 - 30 Most commonly asked questions are concerning the cutting (surface) speeds of grinding wheels. The basic answer is as follows: when grinding without cooling the mid range of the cutting speed equals to about 16 m/s, when using medium-intensive cooling the speed can increase to about 25 to 30 m/s. When grinding on CNC machines where the working space is enclosed and the tool usually cooled from several points by pressurised coolant the surface speed can reach 40 m/s. Exceeding these speeds could cause localised destruction of the resin bond due to high temperature which develops on the surface of the abrasive grains. When calculating the optimal surface speed it is understandably necessary to bear in mind the technical parameters of the grinding machine, dimensions, mainly the width of the abrasive layer and the size of the grinded surface. Our products are manufactured in accordance with the standard mentioned above and marked with values stating the maximum surface speed and revolutions. For this type of grinding wheels the safety margin of surface speed is stated as 63 m/s. However, many of our customers take this value to be the prescribed value for the operation of the tool. For this reason we state it on the tool itself as 40 m/s. 16 D iamond C on tac t s. r. o. Information on operating conditions for diamond and CBN grinding wheels according to the type of grinding: Type of grinding Peripheral Peripheral Speed of the velocity of wheel velocity of work- feed [m/s] piece [m/min] [m/min] Cross feed [mm] In-feed [mm] Plane grinding 25 - 40 - 5 - 20 2-8 0.01 - 0.05 Spherical grinding 25 - 40 40 4 - 0.005 - 0.02 Grinding of bores 5 - 30 40 0.2 - 2 - 0.002 - 0.015 Grinding with oscillation 25 - 40 - 5 - 12 - 0.02 - 0.06 In-feed grinding 25 - 40 - 0.5 - 1 14. COOLING Cooling grinding wheels lengthens their longevity and performance it also improves the quality of the grinded surface and the cleanliness of the surrounding environment. Grinding wheels that are specified for use without cooling contain abrasive and bonding compound which ensures higher ability of self-sharpening, however, this is detrimental to their longevity. We recommend the cooling in all cases where it is allowed by the machinery and the character of the work. Coolant must be brought by the means of an appropriate nozzle to the contact point between the grinding wheel and the work-piece in a way that allows the fluid to be pulled into the cut. Cooling of diamond and CBN grinding wheels requires special coolant fluids which are offered by many companies manufacturing and supplying these. When preparing, using and storing coolant fluids adhere to manufacturer’s recommendations. 15. WORK SAFETY Before fitting any tool onto a grinding machine it is always necessary to inspect carefully each grinding wheel for possible damage caused by transportation or storing. ■ Damaged grinding wheels must not be used. ■ Only trained and experienced operators or an appointed tool setter can fit grinding wheels onto the machin■ ■ ■ ■ ■ ■ ■ ery. The use of grinding wheels is allowed only on machinery which is constructed according to the requirements of norm. Fixing spurs or flanges must not be damaged; it is not suitable to use such fixing components that are worn down by the use with classical vitrious abrasive. The seating faces of spurs or flanges must be thoroughly cleaned before attempting fitting; the grinding wheel must be mounted on the fixing component easily and without the use of force. Tightening the bolts and nuts must be done evenly and only using tools that are standardized by the grinding machine manufacturer. Cleaning and dressing of grinding wheels must only be carried out in manner described within this guide. Diamond dressers are intended only for use with grinding wheels with vitrious bond. It is necessary to use appropriate and effective dust and particle extraction when grinding without the use of cooling fluids. 17 WARNINGS: ■ Chemical or thermal modifications of grinding wheels are strictly prohibited. ■ Mechanical modifications to the bearing body of the grinding wheel are to be carried out only by the manufacturer. ■ It is prohibited to use grinding wheels in hand held grinders or drills. When using diamond and CBN grinding wheels the use of personal protection as follows is required: ■ ■ ■ ■ Sight – approved goggles or protective shields Hearing – ear protection in situations where required by noise levels Breathing – when grinding take care to ensure effective dust extraction, if this is not possible use respirator. Pay attention to personal hygiene. 16. CARE It is necessary to clean grinding wheels immediately if the grinding characteristics are not up to standard. If in doubt clean. This is usually caused by the sticking of the surface of the abrasive layer with grinded material when grinding without cooling or when used to grind unsuitable materials. The cleaning itself is carried out with the use of a enlivening corundum stone, pumice; reviver with rubber bonding compound. Or at least with a shard of a SiC grinding wheel. It is appropriate to wet the grinding wheel prior to cleaning. To achieve effective cleaning and enlivening for face grinding wheels these should be removed from the machinery. Cleaning is carried out on a flat glass panel with the use of free SiC abrasive by circular movements. As shown on the picture. Dressing of grinding wheels should be considered only after the geometrical shape has been lost (i.e. when the edges become rounded, if the abrasive layer becomes uneven etc.) dressing is carried out using a corundum grinding wheel of a higher grade, by about two degrees and of K or M hardness on a centre grinder with cooling. The dressed grinding wheel including the spur is fixed in the operating spindle head and its speed should not exceed 6 m/s. Surface speed of the vitrious grinding wheel is usually 20 to 30 m/s. It is also appropriate to use a free standing dressing machine, which is clamped to the work bench of the grinding machine. The SiC grinding wheel is driven by the friction of the dressed grinding wheel and slowed down by a centrifugal brake. 18 D iamond C on tac t s. r. o. 17. STORAGE Grinding wheels are packed individually, or after an agreement with the customer we can pack several pieces in one box. We use folded or glued boxes made of micro-corrugated card. To prevent movement within the box we use PE bubble wrap. The size of the packaging is based on the dimensional line of our grinding wheels. Postal delivery items are packed in standard cardboard boxes filled with extruded polystyrene. For the purposes of storage we recommend the use of original boxes; stored in such a way as to prevent mechanical damage and impacts. Store in a dry place (with humidity of 80%) and at minimal temperature of + 10oC. The maximum duration of storage is 5 years. 18. WASTE DISPOSAL When the diamond or CBN abrasive layer becomes completely worn out, the dural bearing bodies can be disposed of in manner similar to any other aluminium waste. In cases where parts of the abrasive layer remain on the bearing body (due to uneven wear or damage) it is necessary to mechanically separate these materials. This can be done by a lathe (‘pricking out’) and then dispose of the abrasive separately in a competent way or by returning it to the manufacturer. Paper packaging and wraps made of PE foil can be recycled where facilities exist. Our company has an agreement of mandatory return policy on packaging materials and the recycling of these in accordance with the law. 19 speed conversion table for speed of rotation and peripheral speed Diameter of superabrasive [mm] Maximum operating speed vs [m/s] 5 6 8 10 12 16 20 25 32 35 40 45 6 16000 19100 25500 31900 8 12000 14400 19100 24000 29000 38200 10 9600 11500 15300 19100 23000 30600 38200 48000 20 4800 5750 7650 9550 11500 15300 19100 23900 30600 33500 38200 43000 25 3850 4600 6150 7650 9200 12300 15300 19100 24500 26800 30600 34400 30 3190 3820 5100 6380 7640 10190 12740 15960 20400 22300 25500 28650 40 2400 2900 3850 4800 5750 7650 9550 11950 15300 16750 19100 21500 50 1950 2300 3100 3850 4600 6150 7650 9550 12250 13400 15300 17200 60 1600 1910 2550 3200 3850 5100 6400 8000 10200 11150 12750 14350 75 1280 1530 2040 2540 3060 4080 5100 6400 8150 8950 10200 11500 80 1200 1450 1950 2400 2900 3850 4800 6000 7650 8400 9550 10750 100 960 1150 1550 1950 2300 3100 3850 4800 6150 6700 7650 8600 125 770 920 1250 1550 1850 2450 3100 3850 4900 5350 6150 6900 150 640 770 1050 1300 1550 2050 2550 3200 4100 4500 5100 5750 160 600 720 955 1200 1450 1950 2390 2980 3850 4200 4780 5380 175 550 660 870 1100 1310 1750 2200 2750 3500 3850 4400 4950 180 530 640 850 1080 1300 1700 2150 2700 3400 3750 4250 4800 200 480 580 765 955 1150 1550 1950 2400 3100 3350 3850 4300 250 380 460 615 765 920 1250 1550 1950 2450 2700 3100 3450 300 320 380 510 640 765 1050 1300 1600 2050 2250 2550 2870 350 280 330 440 550 655 875 1100 1400 1750 1950 2200 2450 20 dimensions TAbles 1A1 10 12 14 15 16 18 20 25 30 35 40 45 50 60 65 75 80 90 100 125 130 140 150 160 175 200 225 250 300 350 U min. 3 3 3 3 3 3 3 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 10 10 10 15 15 15 15 15 X recom. 8 8 10 10 10 10 10 10 10 10 10 10 5 5 5 5 5 5 6 6 6 6 10 10 10 10 12 12 12 15 15 15 15 15 15 20 10 10 10 10 8 8 8 8 8 8 10 10 10 10 12 12 15 15 15 15 15 15 20 20 15 15 15 10 10 12 12 12 12 15 15 20 20 20 20 20 15 12 14 15 15 20 20 20 20 20 25 25 25 20 20 20 15 15 15 15 15 15 20 20 25 max. min. recom. max. 15 15 20 20 20 20 20 20 25 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 3 3 3 2 2 2 2 2 3 3 2 3 3 3 3 3 3 4 2 2 2 2,5 2 2 5 5 5 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 2 2.5 2,5 2,5 2,5 2,5 2,5 3 3 3 3 3 3 3 3 5 5 5 5 5 3 3 3 8 5 3 3 3 5 3 3 3 4 5 5 5 H Diameter of the fixing bore according to customer’s requirements D Variations for grinding blind and stepped bores: 6A1.O 6A1P.O 6C9.O Parameters D, X, U according to the table for 1A1; parameters J, F, W, E according to prior agreement. Recommended dimensions of the grinding wheels are under printed by a darker colour 22 D iamond C on tac t s. r. o. Derived variations: 1A1P 1A1R 6A1 9A1 6A1P D 50 75 100 125 150 200 250 300 U min. dop. max. 0.5 0.8 1 1.2 1.5 1.5 1.5 1.5 0.8 1 1.5 1.5 1.8 1.8 1.8 1.8 1 1.5 2 2.5 2.5 2.5 2.5 2.5 X E H 5 5 6 6 5 6 6 7 0.4 0.6 0.8 0.9 1 1 1 1 Diameter of the fixing bore according to customer’s requirements 1A1R - SAW 23 14A1 D 40 45 50 60 65 75 80 90 100 125 130 140 150 160 175 200 225 250 300 350 U min. 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.5 1.5 2 2 2 3 3 X recom. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2 2 3 3 3 5 5 5 3 3 3 3 3 3 3 3 3 3 3 3 3 3 5 5 5 6 8 8 4 4 4 4 4 5 5 5 5 5 5 5 5 5 6 6 6 8 10 10 6 6 6 6 6 6 8 8 8 10 15 15 max. min. recom. max. 5 5 5 5 5 6 6 6 8 10 15 15 15 15 15 15 15 15 20 20 3 3 3 2 2 2 2 2 3 3 2 3 3 3 3 3 3 4 2.5 2.5 3 3 3 5 5 5 10 5 5 10 12 10 10 12 10 10 10 10 10 10 10 3 3 3 3 3 5 5 5 5 5 3 3 5 3 3 3 8 6 5 5 3 6 5 3 3 3 4 5 5 5 T J H 5 5 5 5 5 6 6 6 8 10 15 15 15 15 15 15 15 15 20 20 30 35 38 40 45 50 55 60 70 100 105 115 125 130 140 160 180 200 240 280 Diameter of the fixing bore according to customer’s requirements 3A1 Recommended dimensions of the grinding wheels are under printed by a darker colour 24 D iamond C on tac t s. r. o. Derived variations: 3A1R 14A1R Possible modification to the abrasive section: B 1B1, 3B1, 14B1, 1B1P, 1B1R, 6B1, 9B1, 6B1P D 1D1, 3D1, 14D1, 1D1P, 1D1R, 6D1, 9D1, 6D1P M 1M1, 3M1, 14M1, 1M1P, 1M1R, 6M1, 9M1, 6M1P L 1L1, 3L1, 14L1, 1L1P, 1L1R, 6L1, 9L1, 6L1P Q 1Q1, 3Q1, 14Q1, 1Q1P, 1Q1R, 6Q1, 9Q1, 6Q1P For these modification also indicate the parameters as plotted in the technical drawing. 25 1A1W A B T D X Y 12 12 12 12 12 12 15 15 15 1 1.5 2 2.5 1 1.5 2 2.5 3 3 3 3 3 6 6 6 6 6 60 60 60 15 15 20 20 20 20 20 20 20 20 3 3 3 3 3 3 3 3 3 3 6 6 60 60 60 60 60 60 60 60 60 60 min. recom. max. 9 10 11 12 2.5 2.5 3 3 3 4 5 5 5 6 6 6 6 8 8 10 10 10 13 14 15 16 17 18 19 20 22 25 5 5 5 5 5 5 5 5 5 5 10 10 15 15 15 15 15 15 15 15 5 6 7 8 6 6 6 8 8 8 8 8 L Figure 80 80 80 60 60 60 60 60 60 8 8 8 10 10 10 10 10 A 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 100*) 100*) 100*) 100 100 100 100 100 B *) Length 100 mm for Y only 8 mm 1A1W.O D T min. recom. max. 4 2.5 6 8 5 2.5 6 8 6 2.5 6 8 7 3 6 8 8 3 6 15 9 10 4 5 8 10 15 15 X Y1 L1 1 1.5 1 1.5 1 2 1 2 1.5 2 2 2 2 3 3 4 3 5 4 5 5 6 8 8 8 12 12 12 12 15 15 15 15 Y 3 3 L 6 6 6 6 6 6 6 6 6 6 8 8 8 8 60 60 60 60 60 60 60 60 60 60 60 80 80 80 80 80 80 80 80 80 80 80 100*) 100*) 100*) 100 *) Length 100 mm for Y only 8 mm Recommended dimensions of the grinding wheels are under printed by a darker colour 26 D iamond C on tac t s. r. o. 1C9 U W X min. recom. max. min. recom. max. recom. 6 8 8 10 10 12 15 20 20 10 10 10 10 10 15 20 25 25 20 20 20 20 25 30 30 30 30 5 6 6 6 6 6 10 10 10 7.5 10 10 10 10 15 15 15 15 15 15 20 20 20 20 20 25 25 3 3 3 3 3 3 3 3 4 75 100 125 150 175 200 250 300 350 H Diameter of the fixing bore according to customer’s requirements D D 75 100 125 150 175 200 250 300 350 3U1 X E min. recom. U max. min. recom. W max. recom. min. 8 10 10 10 10 12 15 15 20 10 15 15 15 15 18 20 20 25 15 20 20 20 20 22 25 25 30 6 6 6 6 6 6 10 10 10 7.5 10 10 10 10 10 15 15 15 10 15 15 20 20 20 20 25 25 3 3 3 3 3 3 3 3 4 5 6 6 10 10 15 15 15 15 J H 50 70 100 125 140 160 200 240 280 Diameter of the fixing bore according to customer’s requirements 1U1 14U1 27 20 25 30 35 40 45 50 60 65 75 80 90 100 125 130 140 150 160 175 200 225 250 300 350 U min. 3 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 10 10 10 15 15 15 15 15 X recom. 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 8 10 10 10 15 15 15 15 15 10 10 10 10 15 15 15 20 20 20 20 20 8 8 8 8 10 10 10 10 10 10 10 10 15 15 15 15 20 20 20 25 25 25 25 25 max. min. recom. max. 10 10 10 10 15 15 20 20 20 20 20 20 25 25 30 30 30 30 30 30 30 30 30 30 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 2 2.5 2.5 2.5 2.5 2.5 3 3 3 5 5 5 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 3 3 3 3 3 3 3 3 3 5 5 5 5 5 5 5 5 5 3 3 3 3 3 4 8 8 8 8 8 8 5 5 5 5 5 5 V H Diameter of the fixing bore according to customer’s requirements D Selectable angle of the point 30° – 85° bearing in mind other dimensions of the grinding wheel 1V1 Derived variation with radius: 1VF1 Recommended dimensions of the grinding wheels are under printed by a darker colour 28 D iamond C on tac t 40 45 50 60 65 75 80 90 100 125 130 140 150 160 175 200 225 250 300 350 U min. 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.5 1.5 2 2 2 3 3 X recom. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2 2 3 3 3 5 5 5 3 3 3 3 3 3 3 3 3 3 3 3 3 3 5 5 5 6 8 8 4 4 4 4 4 5 5 5 5 5 5 5 5 5 6 6 6 8 10 10 6 6 6 6 6 6 8 8 8 10 15 15 max. min. recom. max. 5 5 5 5 5 6 6 6 8 10 15 15 15 15 15 15 15 15 20 20 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 2.5 2.5 3 3 3 5 5 5 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 3 3 3 3 3 3 3 3 3 5 5 5 5 5 5 5 5 5 3 3 3 3 3 4 8 8 8 8 8 8 5 5 5 5 5 5 T J V 5 5 5 5 5 6 6 6 8 10 15 15 15 15 15 15 15 15 20 20 30 35 38 40 45 50 55 60 70 100 105 115 125 130 140 160 180 200 240 280 H Diameter of the fixing bore according to customer’s requirements D 14V1 Selectable angle of the point 30° – 85° bearing in mind other dimensions of the grinding wheel 3V1 s. r. o. Derived variations with radius: 3VF1 14VF1 29 recom. 3 3 3 3 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 10 10 10 15 15 15 15 15 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 10 10 max. 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 8 8 8 8 10 15 15 15 15 15 8 8 8 8 8 8 10 10 10 10 12 12 12 12 12 12 15 20 20 20 20 20 8 8 8 8 8 8 8 8 8 10 10 10 10 10 10 15 15 15 15 15 15 10 10 10 10 10 10 10 10 10 15 15 15 15 15 15 20 20 20 20 20 20 20 20 20 25 25 25 X V H Diameter of the fixing bore according to customer’s requirements 15 16 18 20 25 30 35 40 45 50 60 65 75 80 90 100 125 130 140 150 160 175 200 225 250 300 350 U min. 30° to 179° D Depends on the width U and angle V 1E1 Variation for wider wheels: Modification of the abrasive section: 1EE1 1EF1 Recommended dimensions of the grinding wheels are under printed by a darker colour 30 D iamond C on tac t 40 45 50 60 65 75 80 90 100 125 130 140 150 160 175 200 225 250 300 350 U min. 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.5 1.5 2 2 2 3 3 recom. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2 2 3 3 3 5 5 5 3 3 3 3 3 3 3 3 3 3 3 3 3 3 5 5 5 6 8 8 max. 4 4 4 4 4 5 5 5 5 5 5 5 5 5 6 6 6 8 10 10 6 6 6 6 6 6 8 8 8 10 15 15 5 5 5 5 5 5 5 5 5 6 6 6 10 10 10 15 15 15 15 15 X V T J H 5 5 5 5 5 6 6 6 8 10 15 15 15 15 15 15 15 15 20 20 30 35 38 40 45 50 55 60 70 100 105 115 125 130 140 160 180 200 240 280 Diameter of the fixing bore according to customer’s requirements D 30° to 179° 14E1 Depends on the width U and angle V 3E1 s. r. o. Variation for very narrow section: 14E9 31 1F1 3 3 3 3 4 4 4 4 5 5 5 5 5 5 5 5 6 6 6 10 10 10 15 15 15 15 15 X R recom. max. min. max. min. max. 10 10 10 10 10 10 10 10 15 15 15 15 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 2.5 2.5 2.5 2.5 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 6 6 6 8 8 8 8 8 6 6 6 6 6 6 6 6 8 8 8 8 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 1.5 1.5 1.5 1.5 2 2 2 2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3 3 3 5 5 5 7.5 7.5 7.5 7.5 7.5 5 5 5 5 5 5 5 5 7.5 7.5 7.5 7.5 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 H Diameter of the fixing bore according to customer’s requirements 15 16 18 20 25 30 35 40 45 50 60 65 75 80 90 100 125 130 140 150 160 175 200 225 250 300 350 U min. U=2xR D Variation for wider wheels: 1FF1 Recommended dimensions of the grinding wheels are under printed by a darker colour 32 D iamond C on tac t D 40 45 50 60 65 75 80 90 100 125 130 140 150 160 175 200 225 250 300 350 U min. 1 1 1 1 1 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.6 1.6 2 2 2 3 3 X R recom. max. min. max. min. max. 4 5 5 5 5 5 5 5 5 6 6 6 10 10 10 15 15 15 15 15 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 5 5 5 5 5 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 0.5 0.5 0.5 0.5 0.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.8 0.8 1 1 1 1.5 1.5 2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3 3 3 5 5 5 7.5 7.5 7.5 7.5 7.5 T J H 5 5 5 5 5 6 6 6 8 10 15 15 15 15 15 15 15 15 20 20 30 35 38 40 45 50 55 60 70 100 105 115 125 130 140 160 180 200 240 280 Diameter of the fixing bore according to customer’s requirements 14F1 U=2xR 3F1 s. r. o. Variation for very narrow section: 14F9 33 6A2 W min. 50 60 2 2 75 2 80 90 2 2 100 2 125 2 130 140 2 2 150 2 160 2 175 3 200 3 250 3 300 3 350 4 X recom. 3 3 3 7.5 3 3 3 8 3 8 5 5 5 10 5 5 15 6 15 10 25 10 25 10 25 5 5 5 10 5 5 5 10 5 10 6 6 6 12 10 8 20 8 20 15 30 15 30 15 30 6 12 10 10 6 12 6 12 10 10 8 15 15 10 25 10 25 20 35 20 35 20 35 max. min. 8 10 1 1 1 1.5 2 2 15 1 2 15 15 1 1 15 T recom. E max. recom. 3 3 5 5 X + 18 7 3 4 7 2 2 3 3 4 4 7 7 1 2 3 4 10 X + 19 10 20 1 2 3 4 10 20 20 1 1 3 3 4 4 5 5 10 10 20 1.5 3 4 5 10 20 1.5 3 4 5 10 30 2 4 5 6 10 30 2 4 5 6 10 X + 22 13 40 2 4 5 6 10 40 3 4 5 6 10 X + 27 15 50 3 4 5 6 10 H Diameter of the fixing bore according to customer’s requirements D Derived variations: 6V5 6V4 Recommended dimensions of the grinding wheels are under printed by a darker colour 34 D iamond C on tac t s. r. o. 6M2 6Q2 6C2 6A2.SH D 150 175 200 225 250 300 350 500 W X min. recom. max. min. recom. max. 20 20 30 30 40 30 30 - 40 60 75 75 75 80 100 175 **) 70 80 90 100 110 130 150 - 2 2 3 3 3 3 3 - 3 3 3 3 3 3 3 5 5 5 5 5 5 5 5 - T H 15 20 20 25 25 30 30 40 *) *) It is necessary to specify the fixing point: a bore, a bore with thread, conical spur, spur with thread, bores for bolts etc. according to prior agreement **) The abrasive section is composed of six tightly contiguous segments Modification of the abrasive section with a deeper edge: 6C2.SH 35 6A9 50 60 75 80 90 100 125 130 140 150 160 175 200 250 300 W min. 1 1 1.5 1.5 1.5 2 2 2 2 2 3 3 3 3 3 X recom. 2 2 2 2 2 2 2 3 3 3 3 3 3 2 2 3 2 5 5 3 2 3 3 5 5 4 4 4 5 5 5 5 5 5 5 5 6 6 6 6 8 8 max. min. 5 5 5 5 5 10 10 10 10 10 10 10 10 10 10 3 3 3 3 3 5 5 5 5 5 5 5 5 8 8 T recom. 3 3 5 5 5 6 8 8 8 8 8 8 8 10 10 5 5 6 6 6 8 10 10 10 10 10 10 10 15 15 max. 6 6 10 10 10 10 15 15 15 15 15 15 15 20 20 15 15 15 15 15 20 20 20 20 20 20 25 25 25 25 recom. E H 10 X + 20 X + 23 13 X + 25 X + 30 15 Diameter of the fixing bore according to customer’s requirements D 20 Derived variations: 6B9 6A10 Recommended dimensions of the grinding wheels are under printed by a darker colour 36 D iamond C on tac t s. r. o. D 75 100 125 150 175 200 250 W min. 3 3 3 3 5 5 5 X recom. 3 3 5 5 5 5 5 5 5 6 6 10 10 10 10 10 10 10 15 15 15 max. min. recom. max. 10 20 25 25 30 35 40 1.5 1.5 2 3 3 3 4 3 3 3 3 3 4 5 5 5 5 5 5 6 6 T E H 20 8 22 10 25 14 30 35 18 20 Diameter of the fixing bore according to customer’s requirements 9A3 37 11A2 50 60 W min. 2 2 75 2 80 90 2 2 100 2 125 2 130 140 2 2 150 2 160 2 175 3 200 3 250 3 X recom. 3 3 3 7.5 3 3 3 8 3 8 5 5 5 10 5 5 15 6 15 10 25 5 5 5 10 5 5 5 10 5 10 6 6 6 12 10 8 20 8 20 15 30 6 12 10 10 6 12 6 12 10 10 8 15 15 10 25 10 15 20 35 T max. min. recom. max. 8 10 1 1 1 1.5 2 2 3 3 5 5 15 1 2 3 4 7 15 15 1 1 2 2 3 3 4 4 7 7 15 1 2 3 4 10 20 1 2 3 4 10 20 20 1 1 3 3 4 4 5 5 10 10 20 1.5 3 4 5 10 20 1.5 3 4 5 10 30 2 3 4 5 10 30 2 3 4 5 10 40 2 3 4 5 10 recom. E 7 X + 20 10 X + 22 13 H Diameter of the fixing bore according to customer’s requirements D Recommended dimensions of the grinding wheels are under printed by a darker colour 38 D iamond C on tac t s. r. o. Derived variations: 11V5 11V4 11A2P 11M2 11Q2 11B2 11V2 39 12A2 - 45 50 60 W min. 2 2 75 2 80 90 2 2 100 2 125 2 130 140 2 2 150 2 160 2 175 3 200 3 250 3 X recom. 3 3 3 7.5 3 3 3 8 3 8 5 5 5 10 5 5 15 6 15 10 25 5 5 5 10 5 5 5 10 5 10 6 6 6 12 10 8 20 8 20 15 30 6 12 10 10 6 12 6 12 10 10 8 15 15 10 25 10 15 20 35 max. min. 8 10 1 1 1 1.5 2 2 15 1 2 15 15 1 1 2 2 15 1 20 T recom. E max. recom. 3 3 5 5 X + 18 7 3 4 7 3 3 4 4 7 7 2 3 4 10 X + 19 10 1 2 3 4 10 20 20 1 1 3 3 4 4 5 5 10 10 20 1.5 3 4 5 10 20 1.5 3 4 5 10 30 2 3 4 5 10 30 2 3 4 5 10 X + 22 13 40 2 3 4 5 10 H Diameter of the fixing bore according to customer’s requirements D Recommended dimensions of the grinding wheels are under printed by a darker colour 40 D iamond C on tac t s. r. o. Derived variations: 12V5 - 45 12V4 - 45 12A2P - 45 12M2 - 45 12Q2 - 45 12B2 - 45 12V2 - 45 12B9 - 45 41 12A2 - 20 50 60 75 80 90 100 115 120 125 130 140 150 160 175 200 250 300 W min. 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 X recom. 2 2 2 2 2 2 3 3 3 3 3 3 3 3 2 4 3 3 5 5 5 6 6 6 4 5 5 5 6 6 6 6 6 4 3 3 3 3 5 5 5 5 5 3 2 4 4 5 6 5 5 6 6 6 6 10 10 5 5 10 10 10 10 10 10 10 10 10 10 10 10 10 15 15 max. min. 6 6 12 12 12 20 20 20 25 25 25 25 25 30 30 30 30 1 1 1 1 1 1 1 1 1 1 1 1.5 1.5 2 2 3 3 T recom. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 4 4 max. 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 5 5 3 3 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 recom. X+8 E 6 X + 11 X + 13 X + 15 X + 17 X + 19 X + 23 X + 26 H 8 9 10 11 12 15 Diameter of the fixing bore according to customer’s requirements D Recommended dimensions of the grinding wheels are under printed by a darker colour 42 D iamond C on tac t s. r. o. Derived variations: 12V5 - 20 12V4 - 20 12A2P - 20 12M2 - 20 12Q2 - 20 12B2 - 20 Angle V ≥ 30° 12V2 - 20 12B9 - 20 Angle V ≥ 30° 43 D 50 60 75 80 90 100 125 130 140 150 160 175 200 250 300 12A9 W X min. recom. max. min. 1 1 1.5 1.5 1.5 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 5 5 5 5 5 5 5 5 5 10 10 10 10 10 10 10 10 10 10 3 3 3 3 3 5 5 5 5 5 5 5 5 8 8 recom. 3 3 5 5 5 6 8 8 8 8 8 8 8 10 10 5 5 6 6 6 8 10 10 10 10 10 10 10 15 15 max. 6 6 10 10 10 10 15 15 15 15 15 15 15 20 20 10 10 10 10 10 15 15 15 15 15 15 20 20 20 20 T E H 10 25 30 13 35 40 15 Diameter of the fixing bore according to customer’s requirements 11A9 20 Derived variation: 11B9 Recommended dimensions of the grinding wheels are under printed by a darker colour 44 D iamond C on tac t s. r. o. D 50 60 75 100 125 150 175 200 250 W X U T min. recom. max. min. recom. max. min. recom. max. 5 5 5 5 5 6 8 10 10 6 6 8 10 10 10 15 15 15 10 10 15 15 20 20 30 30 40 1.5 1.5 1.5 2 2 2 2 3 3 2 2 2 3 3 3 3 4 4 3 3 3 4 4 4 4 5 5 5 5 5 5 5 6 8 10 10 6 6 8 8 10 10 10 10 10 8 8 10 10 10 10 10 10 10 recom. U + 20 U + 22 E H 7 Diameter of the fixing bore according to customer’s requirements 11C9 10 D 50 60 75 100 125 150 175 200 250 W X U T min. recom. max. min. recom. max. min. recom. max. 5 5 5 5 5 6 8 10 10 6 6 8 10 10 10 15 15 15 10 10 15 15 20 20 30 30 40 1.5 1.5 1.5 2 2 2 2 3 3 2 2 2 3 3 3 3 4 4 3 3 3 4 4 4 4 5 5 5 5 5 5 5 6 8 10 10 6 6 8 8 10 10 10 10 10 8 8 10 10 15 20 20 20 20 recom. U + 18 E H 7 Diameter of the fixing bore according to customer’s requirements 12C9 - 45 U + 19 10 U + 22 45 12C9 - 20 50 60 75 80 100 125 150 175 200 250 300 W X U min. recom. max. min. recom. max. min. recom. max. 5 5 5 5 5 5 6 8 10 10 10 6 6 8 8 10 10 10 15 15 15 20 8 8 10 10 15 20 20 30 30 40 40 1.5 1.5 1.5 1.5 2 2 2 2 3 3 3 2 2 2 2 3 3 3 3 3 4 4 3 3 3 4 4 4 4 4 5 5 5 5 5 5 5 5 5 6 8 10 10 10 6 6 8 8 10 10 10 10 15 15 20 8 8 10 10 15 20 20 20 20 20 25 T E U+8 6 U + 11 U + 13 U + 15 U + 17 U + 19 U + 23 U + 26 8 9 10 11 12 15 H Diameter of the fixing bore according to customer’s requirements D Other possible modifications to the bearing body: 13A2 15A2 18A2 Recommended dimensions of the grinding wheels are under printed by a darker colour 46 D iamond C on tac t s. r. o. 12R4 D 75 100 125 150 W 2 2 2 2 X 3 3 3 3 2 2 2 2 3 3 3 3 T E H 10 5 11 12 6 8 customer’s requirements 47 11V9 50 55 75 100 125 150 175 200 W min. 1 1 1 1.5 1.5 1.5 2 2 recom. 1 1 1.5 1.5 1 1.5 1.5 2 2 2 3 2 2 2 3 3 X max. 3 3 3 4 4 5 5 5 5 5 5 6 6 T 6 6 10 10 10 6 6 6 10 10 10 E 25 15 15 15 15 15 15 30 35 40 50 10 60 13 15 T E H Diameter of the fixing bore according to customer’s requirements D 12V9 50 60 75 100 125 150 175 200 W min. 1 1 1 1.5 1.5 2 2 2 recom. 1 1 1 1.5 1.5 1.5 1.5 1.5 2 2 2 3 3 X max. 2 2 2 3 3 3 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 10 10 20 10 10 10 10 15 15 15 15 15 20 20 10 25 35 15 H Diameter of the fixing bore according to customer’s requirements D Recommended dimensions of the grinding wheels are under printed by a darker colour 48 D iamond C on tac t s. r. o. Modification of the bearing body for larger fixing bores: 11V9 - D 12V9 - D Modification of the abrasive section: 12V9 - 5 12V9 - 4 12V9 - F 49 4A2 50 60 75 80 90 100 115 120 125 130 140 150 160 175 200 250 300 W min. 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 X recom. 2 2 2 2 2 2 3 3 3 3 3 3 3 3 2 4 3 3 5 5 5 6 6 6 4 5 5 5 6 6 6 6 6 4 3 3 3 3 5 5 5 5 5 3 2 4 4 5 6 5 5 6 6 6 10 10 6 5 5 10 10 10 10 10 10 10 10 10 10 10 10 10 15 15 max. min. 6 6 12 12 12 20 20 20 25 25 25 25 25 30 30 30 30 1 1 1 1 1 1 1 1 1 1 1 1.5 1.5 2 2 3 3 recom. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 4 4 max. 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 5 5 3 3 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 T H 8 10 11 12 16 Diameter of the fixing bore according to customer’s requirements D 20 Recommended dimensions of the grinding wheels are under printed by a darker colour 50 D iamond C on tac t s. r. o. Derived variations: 4A2.S 4A2.SO Recommendation: X max. 3 mm, E = T - X Recommendation: X max. 3 mm, E = T - X 4A9 4A2P 4M2 4Q2 4B9 51 4B2 W min. 50 60 75 80 90 100 115 120 125 130 140 150 160 175 200 250 300 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 X recom. 2 2 2 2 2 2 3 3 3 3 3 3 3 3 2 4 5 5 5 3 3 3 2 4 4 5 6 5 4 5 5 5 3 3 3 3 5 5 6 6 6 4 5 5 5 6 6 6 6 6 5 6 6 6 6 10 10 5 5 10 10 10 10 10 10 10 10 10 10 10 10 10 15 15 max. min. 6 6 12 12 12 20 20 20 25 25 25 25 25 30 30 30 30 1 1 1 1 1 1 1 1 1 1 1 1.5 1.5 2 2 3 3 recom. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 4 4 max. 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 5 5 3 3 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 T H 8 10 11 12 16 Diameter of the fixing bore according to customer’s requirements D 20 Comment: E = T - X Derived variations: 4B2.S 4B2.SO Recommendation: X max. 3 mm, E = T - X Recommendation: X max. 3 mm, E = T - X Recommended dimensions of the grinding wheels are under printed by a darker colour 52 D iamond C on tac t s. r. o. 4C9 50 60 75 80 100 125 150 175 200 250 300 W X U T min. recom. max. min. recom. max. min. recom. max. 5 5 5 5 5 5 6 8 10 10 10 6 6 8 8 10 10 10 15 15 15 20 8 8 10 10 15 20 20 30 30 40 40 1.5 1.5 1.5 1.5 2 2 2 2 3 3 3 2 2 2 2 3 3 3 3 3 4 4 3 3 3 4 4 4 4 4 5 5 5 5 5 5 5 5 5 6 8 10 10 10 6 6 8 8 10 10 10 10 15 15 20 8 8 10 10 15 20 20 20 20 20 25 dop. U+6 U+8 U + 13 U + 17 H Diameter of the fixing bore according to customer’s requirements D Derived variations: 4C2 53 4V2 min. recom. max. 1.5 1.5 2 3 3 3 3 2 2 3 3 4 4 5 5 5 5 6 6 6 8 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2 2 3 3 3 3 3 3 3 4 4 5 T E 8 10 11 12 16 V H Diameter of the fixing bore according to customer’s requirements max. V ≥ 30° X recom. Recom. angle 50 60 75 100 125 150 175 W min. E=T-X D Derived variation: 4V2.S Recommended dimensions of the grinding wheels are under printed by a darker colour 54 D iamond C on tac t s. r. o. 4V4 D 75 100 125 150 W 3 3 4 5 5 5 5 6 X 6 6 6 8 10 10 10 10 1 1 1 1.5 2 2 2 2 T 3 3 3 3 11 12 K H 40 50 75 100 customer’s requirements Derived variations: 4B4 4F4 55 3 3 4 5 6 6 6 X 20 30 40 40 40 40 40 2 3 5 T H Diameter of the fixing bore according to customer’s requirements 75 100 125 150 175 200 250 W customer’s requirements D customer’s requirements 4V5 Derived variation: 4V5.N 4F5 4CH9 4Y9 Recommended dimensions of the grinding wheels are under printed by a darker colour 56 D iamond C on tac t s. r. o. 4BT9 D W 75 100 125 150 5 5 5 5 X 6 6 6 6 7.5 10 10 10 1 1 1 1 1.5 1.5 1.5 1.5 2 2 2 2 T J H 8 40 50 75 100 customer’s requirements 10 4ET9 50 60 75 80 100 125 150 W 3 4 5 5 5 5 5 5 5 6 6 6 6 6 X 6 6 7.5 8 10 10 10 1 1 1 1 1 1 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 T 2 2 2 2 2 2 2 6 8 10 H Diameter of the fixing bore according to customer’s requirements D Derived variations: 4BTF9 4ETF9 57 Hand Lap Dimensions of the functional layer for the lapping stone – 35 x 10 x 1.5mm Diamond abrasive – in grain D7 to D126 Bonding compound – resinous RB3D or metallic MB1W. Applications: ■ Small repairs to the cutting face of cutters made of SK and RO - removal of partial dulling - removal of adhered material - prolonging longevity of tools between sharpening ■ Hand repairs of cutting edges after sharpening - removal of ‘needle point’ - lapping of facets - finishing of welding cones - other We will manufacture laps in other dimensions after a prior agreement with the customer. 58 D iamond C on tac t s. r. o. Other products as listed in separate catalogues: ■ Diamond and CBN grinding wheels for woodworking industries ■ ■ ■ ■ ■ ■ Electroplated diamond and CBN grinding wheels CBN mounted points in vitrious bond Diamond dressers Hand diamond needlepoint files Diamond pastes Synthetic diamond powder www.diamondcontact.cz