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

These support units sit on the supported side of a ball screw assembly and use a deep-groove ball bearing rather than the angular bearing found on the fixed side. Model EF matches the shaft end shape of THK’s BNK and SDA-VZ precision ball screws with finished shaft ends. Model EF-L matches the SDA-VCZ shaft end shape with a lower shaft center for a more compact build. Model BF is the standardized square type for general use with ball screws, and Model FF is the round type version matching the BNK shaft end shape.

Used together with the matching fixed-side support unit, these let you assemble a high-precision feed mechanism with far less custom machining.