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Proceedings Paper

Geometric error coupling in instrument ball bearings
Author(s): Edward P. Kingsbury; Henry A. Francis
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Paper Abstract

Instrument ball bearings are used in pairs, loaded against each other, mounted on a shaft, and contained in a housing. Their most important function is to define a spin axis. We develop a vector manufacturing error characterization for each bearing component. We calculate the combined misalignment of a loaded bearing pair, coupled by shaft/housing elasticity, to give a time-dependent resultant displacement/direction of the spin axis with respect to a spin reference axis. Effects of initial placement, contact angle mismatch, and total rotation angle are considered. We suggest that selective assembly with error cancellation is possible for some applications.

Paper Details

Date Published: 1 February 1991
PDF: 7 pages
Proc. SPIE 1454, Beam Deflection and Scanning Technologies, (1 February 1991); doi: 10.1117/12.28069
Show Author Affiliations
Edward P. Kingsbury, Charles Stark Draper Lab. (United States)
Henry A. Francis, Charles Stark Draper Lab. (United States)

Published in SPIE Proceedings Vol. 1454:
Beam Deflection and Scanning Technologies
Leo Beiser; Gerald F. Marshall, Editor(s)

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