FK6 THK Ball Screw Support Unit

THK round fixed-side support unit for ball screws with a 6 mm bearing journal diameter. The FK6 contains a factory-preloaded P5 angular-contact bearing set in a DF arrangement, providing accurate shaft positioning and high axial rigidity. Its compact round housing is ideal for miniature ball screw applications where installation space is limited. The unit is supplied complete with its housing, bearing set, set nut, collars, seal, lock nut and locking screw. Product characteristics Category: Ball screw support units Manufacturer: THK Series: FK Design: Round support unit Mounting position: Fixed side Bearing journal diameter: 6 mm Bearing arrangement: DF angular-contact arrangement Bearing accuracy: P5 Bearing used: 706 equivalent Preload: Factory adjusted Weight: 0.080 kg Country of origin: Japan Main dimensions Shaft diameter d: 6 mm Overall length L: 20 mm Flange thickness H: 7 mm F: 13 mm E: 22 mm Housing location diameter D: 22 mm Housing outside diameter A: 36 mm Mounting-hole pitch-circle diameter: 28 mm B: 28 mm Square dimension T: 12 mm Mounting method A L1: 5.5 mm T1: 3.5 mm Mounting method B L2: 8.5 mm T2: 6.5 mm Mounting-hole dimensions Number of mounting holes: 4 Hole spacing: 90° equidistant Through-hole diameter d1: 3.4 mm Counterbore diameter d2: 6.5 mm Counterbore depth h: 4 mm Thread M: M3 Collar dimensions Collar outside diameter D: 9.5 mm Collar thickness t: 7 mm Load ratings Basic dynamic axial load rating Ca: 1.38 kN Static permissible axial load: 1.76 kN Axial rigidity: 35 N/μm Components supplied Housing: 1 Precision bearing set: 1 Set nut: 1 Collars: 2 Seal: 1 Lock nut: 1 Hexagonal socket-head locking screw with set piece: 1 The FK6 is designed for the fixed end of a miniature ball screw and can be paired with a THK FF6 supported-side unit.