Catalogue 205 - Diamond and CBN Tools - PFERD

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Diamond / CBN Grinding Tools, Resinoid Bond28 I 205
Diamond / CBN Grinding Tools, Resinoid BondDiamond / CBN Grinding ToolsAdvantages of synthetic resinoidbondeddiamond and CBN tools■■The coating qualities of the synthetic resinbond can be perfectly matched to the application.■■The tools are easy to dress. Deviating toolcontours can be processed using the sametools.■■After dressing, please ensure that the,coating is worked on using the sharpeningblock SBL 1002413, so that the easy cuttingqualities of the tool are regained.■■Refer to page 31 in this catalogue for detailedinformation and order details.Recommended operatingconditions for synthetic resinoidbondeddiamond and CBN tools■■Resinoid-bonded diamond and CBN grindingwheels are frequently used to grind orre-grind (i.e. sharpen) tungsten carbide orsuper high-speed steel (HSS) tools.■■Applications include both wet and drygrinding.■■In addition, these tools are successfullyemployed in a wide variety of productiongrinding processes.■■In selecting a machine for use with diamondor CBN tools, high rigidity and a sufficientpower output are key criteria to beconsidered.■■Care should also be taken to ensure thatthe machine will achieve the recommendedcutting speed.CoolantDiamond grinding wheelsEmulsions (1-5%).CBN grinding wheelsLow-viscosity mineral oils or emulsions(5-8%) with EP additives.Cooling with pure mineral oil has been shownto yield substantial tool life benefits in manyproduction grinding environments.Order example11V9 100-2-10-20 D 126 PHT C 75Explanation Order example11V9= Name and shape of the tool acc.ISO 6104100 = Outer dia. D [mm]2 = Coating width X [mm]10 = Coating height U [mm]20 = Bore dia. H [mm]D 126PHTC 75= Grit sizes(D = Diamond, B = CBN)= Bond type= Grit concentration (C)DH70°XUDry or wet grindingWet grinding is generally preferable to dryas it reduces the load on the grinding wheel,thereby causing less wear. Moreover, the riskof overheating the workpiece is much lower.Nevertheless, resinoid-bonded diamond andCBN grinding wheels are very often useddry on tool grinding machines which are notequipped with suitable hoods or where constantvisual monitoring is desirable.205PFERD abrasive bond types and their characteristicsIn addition to the bond types described in thiscatalogue, a broad range of special bonds forspecial grinding tasks can be supplied by arrangementwith our application engineers.For more information please contact ourapplications engineering team.■ ■PHTPhenolic resin bond for high-performancedry grinding.PHT bonds are designed for dry grinding,i.e. they provide “cool” grinding propertieseven without the use of a coolant.■ ■PHT 4.1 (only CBN)Bond for maximum stock removal rates.Very long tool life. Suitable for dry and wetgrinding.■ ■PH 4.2 (only CBN)High-performance bond for cool dry grindingat low feed rates, self-wearing type. It isnot necessary to readjust the core. Only for11 V 9 and 12 V 9 up to 150 mm dia.■ ■PHSTPhenolic resin bond for dry grinding at veryhigh stock removal rates.PHST type bonds have an even higher loadresistance, i.e. they allow a greater amountof infeed per stroke without causing thermaldamage to the workpiece.Inevitably, the reduction in grinding time isobtained at the price of a slightly shortertool life.■ ■PHNPhenolic resin bond for high-performancewet grinding.PHN is a bond type designed specificallyfor wet grinding. It is comparatively hard,providing an exceptional tool life and profileholding ability.205 I29
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Catalogue 205 - Diamond and CBN Tools - PFERD

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