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Lapping Plate Reconditioning
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If the lapping plate is out of flat and/or has lost texture it should be re-conditioned. We recommend the following.
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For composite lapping plates place a PCR in one of the roller yokes. For cast iron or pure metal plates use a cast iron conditioning ring and a non-diamond abrasive such as aluminum oxide. |
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The ring should overlap both the ID and the OD of the lapping plate (this will ensure that a ridge is not formed during conditioning). |
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Spray enough lubricant on the plate to keep it wet and run the PCR for about 1-2 min at 60 RPM (no load). Note: Use lubricant throughout the re-conditioning cycle, do not use diamond slurry while re-conditioning with a diamond plated ring.
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To correct the flatness of a plate which is too far concave (see illustration above), position the PCR outward (toward the OD of the plate). |
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To correct flatness for a plate which is too far convex (see illustration below), position the PCR inward (toward the ID of the plate). Note: Make small adjustments until you develop a feel for how far to move the ring in or out (usually about 0.25” – 0.50” is adequate). |
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Important: it is much easier to make the plate go in the positive direction (convex), than to bring it back negative (concave), for this reason it is important not to let the plate go too far convex. |
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