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

This type of ball bearing is recommended when alignment of the shaft and housing is difficult and the shaft may flex. The outer ring has a spherical raceway and its center of curvature coincides with that of the bearing; therefore, the axis of the inner ring, balls and cage can deflect to some extent around the bearing center. Pressed steel cages are usually used. Since the contact angle is small, the axial load capacity is low. The permissible dynamic misalignment is approximately 0.07 to 0.12 radian (4 to 7 degrees) under normal loads.

Bearing Number	Bore Dia	Outer DIa	Width	Size
45 mm x 100 mm x 25 mm skf 1309 ETN9 Self-aligning ball bearings	4 mm	74 mm	NTN	855 kN
40 mm x 90 mm x 33 mm skf 2308 EM Self-aligning ball bearings	612,2 mm	520000 N	483 mm	460 mm
35 mm x 72 mm x 23 mm skf 2207 E-2RS1TN9 Self-aligning ball bearings	15	15 mm	11 °	14,25 mm
35 mm x 80 mm x 31 mm skf 2307 EKM Self-aligning ball bearings	9.0 in	10.5 in	Split Cylindrical Re	3 in
90 mm x 190 mm x 64 mm skf 2318 KM Self-aligning ball bearings	58,5 kN	15 °	20	64 kN
80 mm x 190 mm x 43 mm skf 1318 K + H 318 Self-aligning ball bearings	80 mm x 190 mm x 43 mm	51,2 mm	17,46 mm	18,85 mm
110 mm x 200 mm x 53 mm skf 2222 Self-aligning ball bearings	FAG	980 1/min / Limiting	11900000 N / Static	534 mm
100 mm x 215 mm x 73 mm skf 2320 M Self-aligning ball bearings	180 mm	15 mm	280	254,3 mm
60 mm x 110 mm x 28 mm skf 2212 E-2RS1KTN9 Self-aligning ball bearings	6 mm	40 mm	25 mm	60 mm x 110 mm x 28 mm
70 mm x 140 mm x 26 mm skf 1216 K + H 216 Self-aligning ball bearings	24 mm	15 mm	6,5 mm	12 kN
100 mm x 215 mm x 73 mm skf 2320 K Self-aligning ball bearings	1,360,000 N	446 mm	Open	551 mm
35 mm x 72 mm x 23 mm skf 2207 ETN9 Self-aligning ball bearings	39,5 mm	2,4 mm	0,35	34,988