NTN DRIVESHAFT ANDERlu, INC.

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.

Toyana 2210K-2RS self aligning ball bearings
37 mm
65x160x37
35 mm x 80 mm x 31 mm SKF 2307EKTN9 self aligning ball bearings
Cast Iron
2-7/32 in
75 mm x 160 mm x 55 mm NTN 2315S self aligning ball bearings
5.5000 in
USFB 5000
85 mm x 180 mm x 60 mm ISB 2317 K self aligning ball bearings
Cast Iron
2-7/32 in
35 mm x 72 mm x 17 mm FAG 1207-TVH self aligning ball bearings
4.9375 in
19.7030 in
35 mm x 72 mm x 23 mm NKE 2207-K-2RS+H307 self aligning ball bearings
IKO
88,2 kN
70 mm x 150 mm x 35 mm ISB 1314 self aligning ball bearings
Commercial
.5620 in
80 mm x 140 mm x 26 mm NTN 1216S self aligning ball bearings
Commercial
.5620 in
Toyana 1205K self aligning ball bearings
120x215x40
40
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608zz Bearing
l44649 Bearing
Bearing 6901 Bearing
lm20uu Bearing