A pair of swimmingdiving goggles includes a goggle body, a buckle, and a head strap. The workpieces are disposed on a support in the area of a longitudinal plane of the grinding machine. The coupling apparatus has outer splines on the gear shaft other end that mesh with inner splines of a ring gear connected to a coupling flange member by bolts and nuts. A removable power panel rests in the interior of the housing and provides electrical receptacles. The segments are directed to rotate and translate on the inner cylindrical frame.