Self Aligning Ball Bearings
Self-aligning ball bearings have two rows of balls, a common sphered raceway in the outer ring and two deep uninterrupted raceway grooves in the inner ring. They are available open or sealed. The bearings are insensitive to angular misalignment of the shaft relative to the housing (fig. 1), which can be caused, for example, by shaft deflection.
In a self-aligning bearing, the inner ring has two raceways and the outer ring has a single spherical raceway with its center of curvature coincident with the bearing axis. This allows the axis of the inner ring, balls and cage to deflect around the bearing center to automatically correct misalignment caused by housing and shaft machining or installation error.
A self-aligning bearing is recommended when the alignment of the shaft and housing is difficult or when the shaft may bend during operation. Brda notes that similar to deep groove ball bearings, most self-aligning ball are for general use.
- 100 mm x 180 mm x 34 mm NKE 1220-K self aligning ball bearings
- Commercial
- .5620 in
- 50,000 mm x 90,000 mm x 23,000 mm SNR 2210KEEG15 self aligning ball bearings
- 4.9375 in
- 19.7030 in
- 100 mm x 180 mm x 46 mm NSK 2220 K self aligning ball bearings
- Cast Iron
- 2-7/32 in
- 20 mm x 47 mm x 18 mm NSK 2204 K self aligning ball bearings
- 5.5000 in
- USFB 5000
- 110 mm x 240 mm x 80 mm NTN 2322SK self aligning ball bearings
- 15,875 mm
- 15,875
- 45 mm x 100 mm x 25 mm NACHI 1309K self aligning ball bearings
- 37 mm
- 65x160x37
- 30 mm x 72 mm x 19 mm ISO 1306K self aligning ball bearings
- 37 mm
- 65x160x37
