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Units to North American standards

F4B ball bearing unit, set screw locking
F2B ball bearing unit, SKF ConCentra locking
Flanged units compliant with North American standards are available with two different housing shapes:
  • Square flanged units with four attachment bolt holes (series F4B)
  • Oval flanged units with two attachment bolt holes (series F2B)

F4BM and F2BM are the medium-duty series. The housings accommodate a larger bearing for a given shaft size, resulting in a greater load carrying capacity. 

All units use cast iron housings and are supplied with a grease fitting for relubrication. 

You can find these units in the product tables by filtering for 'North American standard':

Insert bearing designs

Units compliant with North American standards are available with a number of insert bearing designs: 

  • Set screw locking
    • Wide inner ring bearings with seals and flingers (suffix TF)
    • Sealed narrow inner ring bearings (suffix RM)
  • Eccentric locking collar
    • Wide inner ring bearings with seals and flingers (suffix WF)
    • Sealed narrow inner ring bearings (suffix FM)
  • SKF ConCentra locking
    • Wide inner ring bearings with seals and flingers (suffix LF)
    SKF ConCentra locking provides reduced vibration and reduced shaft damage.
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