Specifications of NSK Bearing 1219K
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| 95 | 170 | 32 | 2.1 | 64 | 27.1 | 3,400 | 4,000 | 1219K |  |
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NSK Bearing 1219K
Photo may not represent actual item. See the technical specification for details.
Product description of NSK Bearing 1219K
NSK Bearing 1219K 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.
NSK Bearing 1219K In the self-aligning ball bearing, two rows of rolling elements are supported in two raceway grooves in the inner ring. The raceway on the outer ring has a curved form. The cage combines the two rows of balls and the inner ring to form a unit that can align itself by swivel-ling relative to the outer ring.
Due to the curved raceway on the outer ring, self-aligning ball bearings are tolerant of misalignment between the shaft and housing and deflections of the shaft. They can thus compensate static and dynamic angular defects within certain angular limits in a rotating shaft system.
NSK Bearing 1219K They are used particularly in sectors such as agricultural machinery, conveying equipment, simple woodworking machinery and ventilators.
Self-aligning ball bearings are better suited to higher speeds on account of their point contact, than barrel roller bearings with line contact. The bearings run more quietly and at lower temperatures than bearings with comparable specified characteristics. Self-aligning ball bearings are particularly suitable: if there is skewing between the outer and inner ring (for the compensation of angular misalignment) for bearing arrangements with high radial loads for higher speeds on account of their point contact, than barrel roller bearings with line contact where bearings with the above-mentioned characteristics are expected to run more quietly and at lower temperatures, even at high speeds
