Patent ID: 6773336
Filing Date: 2004-08-10
Classification: B24B

Abstract:
A method of forming a recess in a body having an outer surface of substantially cylindrical form, the method comprising:providing a grinding wheel having a first axis, a circumferential surface concave to a second axis, which is substantially orthogonal to the first axis, and first and second opposing radial surfaces of substantially planar form, engaging at least a portion of the circumferential surface of the grinding wheel with the outer surface of the body; and rotating at least one of the grinding wheel and the body relative to the other to cause a region of the body to be ground by said wheel, thereby to define a recess in the body having a periphery at the outer cylindrical surface thereof, said periphery having at least two substantially square corners, first and second substantially parallel facing edges extending from the two substantially square corners, the two substantially square corners being joined by a third straight edge.