You may be interested in reading this document on grinding switches. Switches are not the same as regular linear rail, of course, but it may still be useful.
Quote:SpenoPrecise placing of the grinding motors is achieved through the use of special stones of 180 mm diameter and a height of 105 mm. New stone materials permit
an effective grinding time of over four hours and there is no need to change grinding stones during a shift. Specially shaped stones - only 27mm thick - are dedicated to working at the gauge corner to assure complete profiling.
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