Klingspor main catalogue Abrasive, cutting-off & grinding discs Page 408
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Kronenflex® cutting-off wheels and grinding discs Technical Glossary Recognise and avoid errors Issue Cutting surface is blue Cutting-off wheels Disc wear is too high Crooked cut Disc breakage Disc periphery is frayed Disc jumps Bore hole is broken Issue Removal rate is too low Grinding discs Disc is loaded/clogged Wear is too high Periphery is not rounded / breakage on the edge Disc wobbles 408 Possible cause Solution Cutting time is too long Increase feed speed or grinding pressure Drive power is too low Use a more powerful machine Disc is too hard Select a softer bond Material cross section is too great for the disc diameter Work with a saw cut / work with a smaller material diameter Cutting disc is too wide for the material/application Use a thinner cutting disc White cutting surface: disc hardness is too low Select a harder bond Peripheral speed is too low Increase peripheral speed RPM decrease is too great Reduce grinding pressure or use a more powerful machine Workpiece is not mounted properly Mount the material closer to the cutting site Grinding pressure is too great Reduce grinding pressure Disc width is too thin for the material/application Increase disc width Disc is completely worn down Replace disc Machine is operated incorrectly Avoid lateral pressure on the disc Incorrect wheel flange diameter Use wheel flange with identical diameters Cutting-off wheel is used for grinding Cutting-off wheels may not be used for grinding Material is not properly affixed Mount the material closer to the cutting site Disc periphery is burned Select a softer bond, decrease grinding pressure Material is not properly affixed Mount the material closer to the cutting site Wheel flange is dirty or worn out Clean wheel flange or replace wheel flange Bearing is defective Replace machine or replace bearing Bore dimension and mount do not match Use proper bore dimension or use a reducer ring Wheel flanges are of different sizes Use wheel flanges that have the same diameters Machine is operated incorrectly Reduce lateral pressure on the disc Cutting-off wheel is used for grinding Cutting-off wheels may not be used for grinding Possible cause Solution Shiny contact surface: bond is too hard Select a softer bond Grinding pressure is too low Increase grinding pressure Machine performance is too low Use a more powerful machine Bond is too hard Select a softer bond Loading/clogging with NF metals Use softer bond or select a special cutting-off wheel for NF metals Grinding pressure is too low Increase grinding pressure Grinding pressure is too high Reduce grinding pressure Bond is too soft Select a harder bond Machine RPM decreases too quickly Reduce grinding pressure Machine performance is too low Use a more powerful machine Disc angle is too flat Increase disc angle (at least 25°) Grinding pressure is too high Reduce grinding pressure The mount is not centred Check bore diameter and mounting diameter and adjust accordingly Mounting shaft is worn Replace machine Mounting flange is worn / dirty / incorrect Replace / clean mounting flange / check dimensions Disc wobbles Use a new disc
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