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 (fig. 1), 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.
However, depending on the surrounding structure, such an angle may not be possible.

Bearing Number	Bore Dia	Outer DIa	Width	Size
RHP BEARING NMJ1M Self Aligning Ball Bearings	48 mm	200	48	80 mm
RHP BEARING NMJ3/4TN Self Aligning Ball Bearings	190 mm	156 mm	1,5 mm	140
RHP BEARING 108TN Self Aligning Ball Bearings	224 kN	182,562 mm	3,52 Kg	123,825 mm
RHP BEARING NMJ1.5/8M Self Aligning Ball Bearings	13	30x55x13	30 mm	55 mm
RHP BEARING NMJ2M Self Aligning Ball Bearings	1.5 mm	8,000 rpm	91.5 mm	1.5 mm
RHP BEARING NLJ3M Self Aligning Ball Bearings	125	34 mm	80	34
RHP BEARING NMJ1.1/2M Self Aligning Ball Bearings	CX189	VKBA 1347	FAG	R151.15