Bearings – Rotary bearing – Antifriction bearing
Patent
1997-09-04
1999-01-26
Hannon, Thomas R.
Bearings
Rotary bearing
Antifriction bearing
384448, 384500, F16L 1928
Patent
active
058631364
ABSTRACT:
The center of rotation of a shaft 2 with inner rings 11a externally secured thereto, is made concentric with the geometric center to thereby prevent the occurrence of runout during high speed rotation. To achieve this, the axial runout of the end portion of the shaft 2 is detected by a displacement sensor 23 while the shaft 2 is rotating. Then based on the measurement results, a portion of the shaft 2 is heated by a laser projector 24 to produce a structural change in this portion, thereby slightly bending the shaft 2. The center of rotation of the shaft 2 is thus made to coincide with the geometric center as a result of the bending.
REFERENCES:
patent: 4395077 (1983-07-01), Wong
patent: 4900958 (1990-02-01), Kitahara et al.
patent: 5036235 (1991-07-01), Kleckner
patent: 5599111 (1997-02-01), Miyazaki et al.
Hannon Thomas R.
NSK Ltd.
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