PDFWAC 296-807-18045
Mount wheels properly.
(1) You must make sure wheels fit freely on the spindle, wheel sleeves, or adaptors, and remain free under all grinding conditions.
(2) You must make sure wheel, blotter and flange surfaces that contact each other are flat and free of foreign particles.
(3) You must make sure any reducing bushing used in the wheel hole:
(a) Fits freely on the spindle and maintains proper clearance;
(b) Does not exceed the width of the wheel or contact the flanges.
(4) You must make sure that multiple wheels mounted between a single set of flanges are either:
(a) Cemented together; or
(b) Separated by spacers that have a diameter and bearing surface that is the same as the mounting flanges.