Title: Spindle assemblies for machine tools

Abstract: A rotary spindle assembly for a machine tool including a spindle supported at opposite ends by oppositely directed roller bearings. The bearing at that end of the spindle opposite to the nose end is an outer race which is axially slidable in a housing, and a plurality of compression springs are arranged between the outer race and an annular thrust block to bias the outer race away from the axial center of the spindle. Elements are provided for varying the total biasing force on the outer race and the apparatus includes a regulator for controlling the force-varying elements. The force varying elements may be apparatus for applying hydraulic pressure to supplement the biasing force or apparatus for modifying the initial compression state of the springs. The axial force on the outer race reduces or eliminates play in the bearings.

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Inventors: Gamet, Louis Jean Marie (Bougival, FR)

Application Number: 542787
Filing Date: 1975-01-21
Publication_date: 1976-04-06
Assignee: La Precision Industrielle (FR)
Primary Class(es): 384/99 384/369, 384/514, 384/583
Other Classes:
US Patent Ref:

1922589	Aug, 1933	Koepke	308/170.
2410388	Oct, 1946	Neal	308/169.
2492091	Dec, 1949	Berg	308/228.
2558308	Jun, 1951	Miller	308/169.
2696410	Dec, 1954	Topanelia, Jr.	308/170.
3792619	Feb, 1974	Cannon et al.	308/228.

Other Refs:
Primary Examiner: King, Lloyd L.
Assistant Examiner:
Attorney: Stevens, Davis, Miller & Mosher