The UBL-6JAW is a centering and compensating design chuck uniquely crafted to handle shafts while saving energy and space. What conventionally took three machines on the automobile production line to handle long shaft workpieces with different end diameters is handled from start to finish on a single NC lathe with work rest and tail centering specifications.

In the mass production of shafts, three operations are typically required: (1) end face and center hole boring, (2) holding both centers while gripping one end with a compression chuck during outer surface work, and (3) turning the piece over to work on the other end.

The UBL-6JAW is a single NC lathe that handles all these operations. First, the 3JAW centers and grips the larger end using the end surface reference, receives the workpiece, bores holes in the end surfaces and center, and works on the outer surface. It then turns the piece around robotically. Finally, it grips the smaller side using compensating with the chuck side as the center reference and completes the piece. If the jaw piece and stoppers are changed, multiple shaft workpieces can be handled.

Thin, cylindrical workpieces are easily deformed, so it is difficult to provide high precision work even when gripping the outer periphery and the sturdy ends with face clamps.

The multi-jaw chuck incorporates a floating mechanism independently developed by Teikoku Chuck to address this problem. The thin outer edge of the workpiece has surface irregularities that are powerfully gripped with uniform strength to provide the workpiece with rigidity. This innovative chuck allows such thin workpieces to be finished with a circular precision equivalent to that normally obtained in thicker pieces.

Whether combining with a centering chuck or other centering mechanism, Teikoku Chuck is dedicated to providing customers with multi-jaw chucks to meet automobile part and other customer specifications. Teikoku Chuck provides prompt delivery even on single-order customized items, high precision on delicate parts such as brake drums and transmission components, and is dedicated to improving quality and productivity for its customers.