NTN Bearing de Mexico, S.A.

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.

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.

RHP BEARING NMJ1M Self Aligning Ball Bearings
48 mm
200
RHP BEARING 108TN Self Aligning Ball Bearings
224 kN
182,562 mm
RHP BEARING NMJ1.5/8M Self Aligning Ball Bearings
13
30x55x13
RHP BEARING NMJ2M Self Aligning Ball Bearings
1.5 mm
8,000 rpm
RHP BEARING NLJ3M Self Aligning Ball Bearings
125
34 mm
RHP BEARING NMJ1.1/2M Self Aligning Ball Bearings
CX189
VKBA 1347
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