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High-speed design bearings, BTM series

fig. 1

Bearings in the BTM series (fig. 1) consist of two non-separable single row angular contact ball bearings arranged back-to-back. They are designed to accommodate axial loads in both directions. When the inner rings are pressed together, preload within a predetermined range will result.

These high-speed design bearings are available with two different contact angles:

  • a 30° contact angle, designation suffix A
  • a 40° contact angle, designation suffix B

Bearings with a 30° contact angle can accommodate higher speeds while bearings with a 40° contact angle are more suitable for applications that require a higher degree of axial rigidity.

According to the ISO definition, BTM series bearings are radial bearings because they have a 30° or 40° contact angle. However, since these bearings are only intended to accommodate axial loads, only their basic load rating in the axial direction is listed in the product table.
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