Finishing machine for trochoidal surfaces

An apparatus for finishing non-circular work pieces of a trochoidal configuration comprising in combination, a movable work head and a axially positioned tool head on a support base, said work head movable towards and away from said tool head on guide rods positioned on said support base, said work head having holding means to grip a work piece having an inner trochoidal surface and rotating same in a trochoidal path of that defined by the work piece about the tool head, said work head having a main drive shaft, a support housing securing said shaft, an offset shaft extending from said main drive shaft, gear means secured to said holding means for meshed engagement with a secondary gear means affixed to said support housing, means for driving and controlling said main drive shaft and said work piece on said support base and in relation to said tool head, a support frame assembly on said support base, a first pair of vertically spaced and aligned guide bars in said support frame assembly, a secondary pair of vertically spaced aligned guide bars movably positioned on said first pair of said guide bars, a tool support and drive assembly movably secured on said secondary pair of vertically spaced aligned guide bars, a finishing tool head extending from said support and drive assembly comprising a pair of spaced vertically aligned rollers and a work piece engaging platen, said rollers adapted to receive abrasive film dispensing and retrieving drums, micro-abrasive film on said drums engaging said platen, said support and drive assembly further comprising removable positionable idler gears and shaft gears for selectively driving said rollers, and means for oscillating said support and drive assembly on said first spaced vertically aligned guide bars in a fixed longitudinal axis.