Bearings – Rotary bearing – Antifriction bearing
Patent
1998-10-28
2000-03-28
Hannon, Thomas R.
Bearings
Rotary bearing
Antifriction bearing
384518, 384519, 384563, 384583, F16C 3366, F16C 2306
Patent
active
060422734
ABSTRACT:
A machine tool spindle is associated with an adjustable preload mechanism for varying the preload on a bearing set for the spindle the mechanism comprising an annular piston that is selectively pressurized for loading spring(s) carried by a spring retainer that is engageable with the bearing set; and wherein the annular piston is held in an adjusted position by a position locating device including an adjustment member removably supported within a housing for the bearings and selectively engageable with the annular piston; the position locating device having a plurality of adjusted positions selectively engageable with the annular piston for fixing it in one of a plurality of positions for varying the compression of the spring(s) so as to maintain one of a plurality of preloads on the bearing set.
REFERENCES:
patent: Re34310 (1993-07-01), Duncan
patent: 4551032 (1985-11-01), Mottershead
patent: 4915514 (1990-04-01), Soderlund
patent: 5202937 (1993-04-01), Arvidsson
patent: 5386630 (1995-02-01), Fox
patent: 5388917 (1995-02-01), Hibi et al.
patent: 5411388 (1995-05-01), Soderlund
patent: 5803619 (1998-09-01), Tabata et al.
Colonial Tool Group Inc.
Colonial Tool Sales & Service LLC
Hannon Thomas R.
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