Designs and variants

SKF supplies two designs of double direction angular contact thrust ball bearings:

  • the basic design (BTW series, fig. 1) for maximum load carrying capacity and maximum system rigidity for shaft diameters from 35 to 200 mm
  • the high-speed design (BTM series, fig. 2) for maximum speed capability for shaft diameters from 60 to 180 mm

Both designs are available either with steel balls or ceramic balls (→ Hybrid bearings).

BTM and BTW series bearings share the same bore and outside diameters. But BTM series bearings have a 25% lower bearing height (fig. 3), which makes them particularly suitable for compact arrangements. They do not have the same load carrying capacity and axial stiffness as bearings in the BTW series, but can operate at higher speeds.

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