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Support bearings for precision rolled ball screws

SKF offers a full range of support bearings to be fitted on the machined ends of precision rolled ball screws. To cover most assembly situations, three types of support bearings are available
  • with a flange for axial retention
  • with a base for radial fixing
  • with a base for radial positioning with an axially-free bearing
These support bearings incorporate high performance SKF ball bearings, plus efficient sealing solutions offering a long service life to the complete ball screw assembly.

FLBU support bearings

FLBU
Axially locating flanged housings fitted with SKF angular contact ball bearings
Features
  • Precision machined housing made of burnished steel
  • Two SKF preloaded angular contact ball bearings, 72 or 73 series, in back-to-back arrangement
  • Two garter seals
  • Standard self-locking Nylstop nut or high precision KMT nut upon request
Benefits
  • Complete bearing assembly ready to use, simplified application design, easier ordering process
  • Quick assembly onto shaft end
  • Elimination of most technical risks with bearing and seal assembly
  • Bearings dimensions and load carrying capacity perfectly matched to the ball screw characteristics
  • Bearings back-to-back assembly with preload providing stiff and accurate ball screw positioning
  • Greased for life / maintenance-free

PLBU support bearings

PLBU
Fixed pillow blocks fitted with SKF angular contact ball bearings
Features
  • Precision machined housing made of burnished steel
  • Precision machined side faces of the housing can be used as reference assembly surfaces for screw alignment
  • Two SKF preloaded angular contact ball bearings, 72 or 73 series, in back-to-back arrangement
  • Two garter seals
  • Standard self-locking Nylstop nut or high precision KMT nut upon request
Benefits
  • Complete bearing assembly ready to use, simplified application design, easier ordering process
  • Quick assembly onto shaft end
  • Elimination of most technical risks with bearing and seal assembly
  • Bearings dimensions and load carrying capacity perfectly matched to the ball screw characteristics
  • Bearings back-to-back preloaded assembly providing stiff and accurate ball screw positioning
  • Good rigidity provided by the base mounting with dowel pins
  • Greased for life / maintenance-free

BUF support bearings

BUF
Axially free pillow blocks fitted with SKF deep groove ball bearings
Features
  • Precision machined housing made of burnished steel
  • Precision machined side faces of the housing can be used as reference assembly surfaces for screw alignment
  • One SKF deep groove ball bearing of type 62…2RS1
  • Bearing is sealed and greased for life
  • Retaining ring is supplied with the BUF assembly
Benefits
  • Complete bearing assembly ready to use, simplified application design, easier ordering process
  • Quick assembly onto shaft end
  • Elimination of most technical risks with bearing and seal assembly
  • Pure radial support, with possible axial displacement of bearing inside housing, to avoid bearing overloading from system deflection or thermal expansion, etc.
  • Greased for life / maintenance-free
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