110 or around the bearing housing 68 the groove 69 of typical grinders 60 generally is an annular groove perpendicular to the axis of rotation or may be a slot type groove which is parallel to the axis of rotation in either case the mechanical connection as described above is created in situations where the inside diameter of the fitting ring 110 is greater than the diameter of the bearing housing 68 the fitting ring 110 easily slips thereover the upstanding fingers 178 a of the cover 170 a are spread if necessary and placed around the outside diameter of the fitting ring 110 and then released thereon a suitable securing fastener 88 such as a hose clamp is placed around the outside diameter of the upstanding fingers 178 it should be understood that the securing fastener 88 may be placed loosely around the upstanding fingers 178 a before placement of the upstanding fingers 178 a around the outside diameter of the fitting ring 110 to facilitate the process in situations where the inside diameter of the fitting ring 110 is considerably smaller than the outside diameter of the bearing housing 68 because of the composition of the fitting ring 110 a user may cut through the fitting.