Grinding wheels - Technodiamant U.S.A. Inc.
Grinding wheels - Technodiamant U.S.A. Inc.
Grinding wheels - Technodiamant U.S.A. Inc.
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Diamond grinding<strong>wheels</strong>with resin binder,metal binder,ceramic binder.for grinding:- tungsten carbides- flame-sprayed wear resistant alloys- tungsten carbide/steel combinations- glass- ferritesCBN grinding<strong>wheels</strong>with resin binder,metal binder,ceramic binder.for grinding:- high speed steels- hardened high speed steels- hardened 12% chromium steel- flame-sprayed wear resistant alloys<strong>Grinding</strong> <strong>wheels</strong>Enclosed you will find a sheet for each type of wheel.The dimensions are not included in the tables because this catalogue offersyou the facility of noting down the specifications of all the <strong>wheels</strong> you use.We hope that the catalogue will thus become a useful referencedocument, specific to your requirements.<strong>Technodiamant</strong> Almere B.V.Markerkant 13-11, 1314 AL AlmerePO Box 1204, 1300 BE AlmereThe NetherlandsTel: +31(0)36-5343044Fax: +31(0)36-5342636E-mail: info@technodiamant.nlInternet: www.technodiamant.nlFor U.S.A., Canada and Mexico:<strong>Technodiamant</strong> U.S.A. <strong>Inc</strong>.200 Valley Road, Suite 107Mt. Arlington, NJ 07856Tel: +1-973-770 7220Fax +1-973-770 7225E-mail: info@technodiamant.comInternet: www.technodiamant.com
ContentsPageConcentrations for diamond and CBN (incl. table) 3The effect of concentration 4Cutting depth for diamond and CBN grinding <strong>wheels</strong> 5Permissible cutting depth (incl. table) 5Comparison table for grit systems 6Suggestions for the use of diamond <strong>wheels</strong> for grinding carbide 7Explanation of wheel symbols 8Explanation of letters in specifications 8Wheel types 9 - 26<strong>Grinding</strong> <strong>wheels</strong> 2
Concentrations for diamond and CBNConcentration25405075100150175Percentagevolume6.251012.518.752537.543.75Caratsper cm 3We use the same indication of concentration for both diamond and CBN, whichcorresponds to the internationally accepted standard for:concentration 100 = 4.4 crt/cm 3 (1 Carat = 0.2 g)This is used to express the weight of DIAMOND or CBN per cm 3 .Because there are also indications of concentration used for resinbond CBNgrinding <strong>wheels</strong> which are based on the gross weight of nickel coated CBNgrains (60% of the gross grain weight consisting of nickel), the last column ofthe table above also shows these concentrations, preceded by the letter B.1.11.762.23.34.46.67.7CBN incl. 60 percent by weightnickel coatingB - 62.5B - 100B - 125B - 188B - 250B - 375B - 420<strong>Grinding</strong> <strong>wheels</strong> 3
The effect of concentrationConcentrations:The content of diamond or CBN inthe grinding rim is heavily dependentupon the application.Generally, where rapid stockremovalof tungsten carbide or hardened steelis intended, a concentration of 75 to125 is selected. When a good surfacefinish is demanded, lower concentrationsin combination with finerdiamond or CBN powder are required.Concentrations of up to 150 are usedfor profile grinding <strong>wheels</strong> and cylindrical<strong>wheels</strong> which have a small contactarea.Needless to say that <strong>Technodiamant</strong>guarantees the specified concentrations.Grit size:Diamond and CBN grit are availablein many sizes and types. The gritsize isdependent upon the desiredsurface finish. In addition, thegritsize also has an important effecton the grinding behaviour of thewheel.As far as the gritsize is concerned,<strong>Technodiamant</strong> complies with theFEPA standard. You will find acomparison table for the various gritsystems on page 6 in this catalogue.Binders:<strong>Technodiamant</strong> has a large number ofin house developed binders available.The type of binder is often selected incombination with the type of grit andconcentration. Binders are dividedinto metal, resin and ceramic binders.Solid metal binders are often appliedto grind glass and ceramics, whereasresin binders, porous metal bindersand ceramic binders are usually usedfor grinding tungsten carbides andhardened steel.The following more or less “universal”binder codes are often used by<strong>Technodiamant</strong>:XX Wet grinding of carbideX2 Dry grinding of carbideC2 Dry and wet grinding ofcarbide and hardenedsteel.T2 Dry and wet grinding ofhardened steel with cylindrical<strong>wheels</strong>.T3 Dry and wet grinding ofhardened steel with cup<strong>wheels</strong>.GS30 (GR) Wet grinding of flat glass.S149 Wet grinding of opticalglass.Ceramic binder:V-number Wet grinding oftungsten carbide, HSS, etc.<strong>Grinding</strong> <strong>wheels</strong> 4
Cutting depth for diamond and CBN grinding<strong>wheels</strong>The depth of cutting for oscillatinggrinding with forced feeding isassociated with the grit size of thewheel and the fineness required forthe surface. The depth of cut mustalways be less than the protrution ofthe grit from the binder. For a sharpgrinding wheel the protrution will be1/4 to 1/5 of the grit size at the most.However, the generation of heat mustbe held within certain limits as well.When dry grinding with a large contactarea between the wheel and thework piece, the depth of cutmust be much less than whengrinding with a small contact area.For creep feed grinding the grindingdepth setting is not the same as thedepth of cut, since the latter is limitedby the speed of the table. Specialmetal and resin wear resistant bindershave been developed for creep feedgrinding. Because the contact areabetween the wheel and the workpiece is usually large for this grindingmethod, proper cooling is of extremeimportance.Permissible cutting depthSee comparison table for grit systems on page 6<strong>Grinding</strong> <strong>wheels</strong> 5
Comparison table for grit systemsµm DIN 848 FEPA-STANDARD US-MESH µm12501000800630500400315250200160125100806350403225D 1100D 900D 700D 550D 450D 350D 280D 220D 180D 140D 110D 90D 65D 55D 45D 35D 25D 500D 250D 150D 100D 70D 50D 30D 1182D 852D 602D 427D 252D 1181D 1001D 851D 711D 601D 501D 426D 356D 301D 251D 213D 181D 151D 126D 107D 91D 76D 64D 54D 46D 35D 30D 25D 15*40/6060/8080/100100/120120/140140/170170/200200/230230/270270/325325/400500/60016/1818/2020/2525/3030/3535/4040/4545/5050/6060/7070/8080/100100/120120/140140/170170/200200/230230/270270/325325/400500/600* Wheels can also be supplied in grit sizes: D3 - D5 - D7 - D101190100085071060050042535530025021218015012510690756353453832252010<strong>Grinding</strong> <strong>wheels</strong> 6
Suggestions for the use of diamond <strong>wheels</strong>for grinding carbideType ofmachininghand grindingcutters, reamers,etc. on universaltooling grindingmachinesgrinding profileson profile grindingmachinescutters planers,saws for woodworkingflat grinding, cylindricalgrindinginternal grindingM = metal binderK = resin binderFEPAwheel6A211A211A212A211V91EE11E1Q4A26A211A211V912A215A21A114A11A11A1WMMKMKKMPre-grinding Fine grinding LappingFEPAgritD 151D 181D 213D 151D 181D 213D 107D 126D 107D 126D 151D 181D 213D 107D 126D 151D 181D 213D 107D 126D 151D 181D 213D 151D 181D 213100100100-125100-125100150MMKKKKMKFEPAgritD 76D 91D 107D 76D 91D 46D 54D 64D 46D 54D 64D 76D 91D 46D 54D 64D 76D 91D 46D 54D 64D 76D 91D 107D 12650757575-10075-10075150100MKKKKKKFEPAgritD 46D 54D 30D 30D 46D 54D 30D 46D 54D 10D 15D 30D 7D 10D 15D 30D 30D 46D 54D 64concentrationconcentrationconcentration4040-50755025-5075-100The table on page 6 shows a comparison of FEPA gritsagainst US mesh and DIN 848.<strong>Grinding</strong> <strong>wheels</strong> 7
Explanation of wheel symbols6A2 D 151 SW 100 x2wheeltypegrit size grit type concentrationbinderThe FEPA standard shapes for grinding <strong>wheels</strong> are shown onthe following pages.We are also able to supply shapes and sizes which differ fromthe FEPA standard.Explanation of letters in specificationsD = diameter S = chamfer external angleE = thickness at shaft hole T = total thicknessH = shaft hole diameterT1 = reduced thicknessJ = mounting surface diameter U = diamond coating thicknessK = clamping surface diameter (if less than T or T1)L = total stick length V = surface angleL1 = shank lengthW = grinding rim widthL2 = diamond coating length X = grinding rim thicknessR = radius Y = shank diameter<strong>Grinding</strong> <strong>wheels</strong> 8
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