THK EF, EF-L, BF & FF Supported-Side Ball Screw Support Unit

THK EF, EF-L, BF and FF are supported-side support units for ball screws. They use deep-groove ball bearings to support the screw shaft and provide smooth rotation. EF and EF-L are square types, while BF is a square type and FF is a round type.

The EF and EF-L are designed for compatible precision ball screws, while BF is standardised for general ball screw applications. The EF-L design uses a low shaft center to help reduce the installation space. EF, BF and FF are available in different sizes to suit various ball screw shaft diameters.

THK supported-side support units are compact and easy to install. They are designed to work with the corresponding fixed-side support units, allowing the ball screw shaft to be properly supported at both ends.