Self Aligning Ball Bearings

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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  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 1309 self aligning ball bearings

6 mm 3200 r/min
0.43 4 mm

90 mm x 160 mm x 30 mm ISO 1218K+H218 self aligning ball bearings

691 kN 133.35 mm
2 x 1/2-13 UNC SNW 44x7.13/16

60,000 mm x 130,000 mm x 46,000 mm SNR 2312K self aligning ball bearings

35 mm 2 x TK 96
460 mm 3000 kN

45 mm x 100 mm x 36 mm SIGMA 2309 self aligning ball bearings

4500 r/min 3.65 kg
25.4 mm 109.537 mm

Toyana 2214K self aligning ball bearings

11000 rpm 1.00 mm
30.000 mm 22500 N

40 mm x 90 mm x 58 mm KOYO 11308 self aligning ball bearings

0.6 mm 17.8 mm
0.8 mm 0.69 g

100 mm x 180 mm x 34 mm FAG 1220-K-M-C3 + H220 self aligning ball bearings

28000 rpm 4360 N
Two Shields 30.0000 mm

80 mm x 140 mm x 26 mm NTN 1216SK self aligning ball bearings

269 kg 400 N·m
628.65 mm 708.025 mm

95 mm x 170 mm x 43 mm FAG 2219-M self aligning ball bearings

47.625 mm 10.9 kg
158 kN 79.375 mm

ISB TSM 08-01 BB-E self aligning ball bearings

5000 rpm 1.00 mm
Two Seals 54000 N