BSBD Double Row Ball Screw Support Bearings

NSK’s double row BSBD series of support bearings for ball screw drives are designed to facilitate accurate positioning of a workpiece or machine component quickly and efficiently while supporting large axial forces in both directions with accuracy and rigidity. They’re sealed, greased for life and available in housing- and direct-mounted design types.

BSBD Ball Screw Support Bearings

Design Features

  • Special design double row angular contact thrust ball bearing in back-to-back (DB) arrangement
  • Available as housing mounted BSN type or direct-mount BSF type with eccentric flanged outer ring
  • With low friction, multi-lip contact seals
  • Greased for life, but equipped with outer ring lubrication groove and holes to facilitate relubrication during operation
  • BSF type features outer ring mounting holes and extraction groove for easy direct installation and removal
  • With 60° contact angle
  • With P2B accuracy (ISO class 2 with special dimensional tolerances)
  • Available for bore diameters from 12 to 60 mm
  • Available in matched pairs (BSN type only)

Operating Benefits

  • Double row design and high contact angle accommodates high axial loads in both directions
  • Multi-lip contact seals ensure excellent grease retention and high resistance to dust penetration, with low friction and low heat generation at high speeds
  • Easy installation

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