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Deep groove bearings are by far the most common type of
miniature bearing. All the standard bearings featured in
the RotoPrecision Miniature and Instrument Bearing
Catalogue are deep groove bearings. They are
designed for applications where radial load is the
dominant load consideration, though the clearances in
radial bearings also offer the opportunity for
introducing a small contact angle to accommodate
moderate axial loads; or under preloaded conditions, to
improve rigidity. Specifying a greater clearance than
standard allows for even greater contact angle to be
achieved.
Deep groove bearings can be duplexed and preloaded into
pairs or sets in order to achieve even greater rigidity
and quieter, more accurate motion.
Another feature that can be specified for deep groove
bearings is an integral mounting flange, eliminating the
need for accurate alignment of a stepped housing bore. A
flange also eliminates the need for circlips in small or
thin-walled housing bores. Shields and various seal
configurations can be specified on most sizes of
bearings to protect from contamination. Extended inner
rings can be used to eliminate the need for shims,
spacers or shaft / housing stepping. Finally, various
options exist for non-standard outer rings for guide
rollers, wheels, etc.
Less common in the miniature and instrument bearing
range is the angular contact bearing, and it is largely
found in instrument bearing applications. The
distinguishing characteristic of these bearings is a
relieved inner ring to accommodate particular
internal characteristics. Due to this, angular contact
bearings can only accept axial loads in one direction
and are available with fewer optional features.
If you
feel that your axial loads or other operating conditions
may warrant an angular contact bearing, please consult
with one of our
Application Support specialists.
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