Hybrid hydrostatic spindle

Details Hybrid hydrostatic spindle Hybrid hydrostatic spindle

B - Operations, Transporting

23

C

B23C 9/00 (2006.01) B23Q 1/26 (2006.01) B23Q 1/70 (2006.01)

Patent

CA 2317854

The present invention relates to a spindle unit which is able two work both in a low speed powerful roughing regime and medium and high speed precision semi-finishing and finishing. The spindle unit includes a body, a shaft placed into the body, journal bearings between the body and the shaft, and at least one journal-thrust ball bearing assembly placed between the body and the shaft. A hydraulic or pneumatic cylinder is used to move the shaft in an axial direction. The spindle unit further has a pad placed on at least one side of the hydraulic or pneumatic cylinder. As a result of this construction, the spindle unit can work as a fully restricted spindle unit with and without additional ball bearing support.

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