Ball Screw Brackets Support Unit Fixed and Floated Side Bk Bf Fk FF Ek Ef Ball Screw Support with Lock Nut. Interchangeable with TBI/THK: Sizes match TBI and THK standards for easy interchangeability. High Precision C3 Grade: Available in C3, C5, and C7 precision grades for various applications. Wide Diameter Range: Screw diameters available from 10mm to 50mm to suit different needs. Customizable End Machining: We can machine the two end sides of ball screws according to your requirements. Comprehensive Product Match: Full range matching including nuts, housings, couplers, and support units. Multiple Series Options: Offering SFU, SFK, SFS, SFI, SFY, SFA, and DFU series ball screws. High Rigidity Design: Features high reliability, smooth operation, and high rigidity. Versatile Material Options: Support units made from Bearing Steel, Stainless Steel, or Carbon Steel.