THK EF, EF-L, BF, and FF Series Support Unit

Support units are dedicated bearing components used in combination with ball screws to support shaft ends and ensure stable, accurate operation. They are available in multiple series to suit different shaft-end specifications and installation requirements.

These support units are designed primarily for the supported side of ball screw assemblies.

EF and FF Series
– Dedicated for Model BNK and Model SDA-VZ precision ball screws with finished shaft ends

EF-L Series
– Low shaft-center type for compact machine layouts

BF Series
– Standardized support units for general ball screw applications

Supported-side units in this group use deep-groove ball bearings, allowing smooth rotation while accommodating axial displacement.