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
55 mm x 110 mm x 28 mm skf 2212 EKTN9 + H 312 Self-aligning ball bearings	193.675 mm	5	79.375 mm	68.04 g
45 mm x 90 mm x 23 mm skf 2210 EKTN9 + H 310 Self-aligning ball bearings	3800 rpm	124000 N	4500 rpm	80.000 mm
17 mm x 47 mm x 14 mm skf 1204 EKTN9 + H 204 Self-aligning ball bearings	110.0000 mm	31200 N	62.00 mm	12200 N
65 mm x 140 mm x 33 mm skf 1313 EKTN9 Self-aligning ball bearings	1.1 mm	1.991 kN	46 min	48.186 kN
25 mm x 62 mm x 16 mm skf 1206 EKTN9 + H 206 Self-aligning ball bearings	1.1 mm	370 N	20 mm	0.92
95 mm x 170 mm x 43 mm skf 2219 KM Self-aligning ball bearings	5 mm	0.2	216 kN	2400 kN
110 mm x 240 mm x 50 mm skf 1322 M Self-aligning ball bearings	71500 N	5600 rpm	6700 rpm	2.00 mm
65 mm x 130 mm x 31 mm skf 2215 EKTN9 + H 315 Self-aligning ball bearings	116000 N	37.00 mm	125000 N	2.00 mm