BF12 THK Ball Screw Support Unit

THK square supported-side unit for ball screws with a 10 mm bearing journal diameter. The BF12 supports the free end of a ball screw using a sealed deep-groove ball bearing. Its compact, standardised housing helps maintain correct shaft alignment while allowing the axial movement required to accommodate thermal expansion. The unit is supplied complete with its housing, bearing and retaining snap ring. Product characteristics Category: Ball screw support units Manufacturer: THK Series: BF Design: Square support unit Mounting position: Supported side Bearing journal diameter: 10 mm Bearing type: Deep-groove ball bearing Bearing used: 6000ZZ Preload: Without preload Snap ring: C10 Weight: 0.300 kg Country of origin: Japan Main dimensions Shaft diameter d: 10 mm Overall length L: 20 mm Housing width B: 60 mm Housing height H: 43 mm Housing thickness b: 30 mm Shaft centre height h1: 25 mm ±0.02 mm B1: 35 mm H1: 32.5 mm E: 18 mm Mounting-hole pitch P: 46 mm Mounting-hole dimensions Through-hole diameter d1: 6.6 mm Counterbore diameter d2: 10.8 mm Counterbore depth h: 1.5 mm Retaining diameter d3: 5.5 mm Load ratings Basic dynamic radial load rating C: 4.55 kN Basic static radial load rating C0: 1.96 kN Components supplied Housing: 1 Deep-groove ball bearing: 1 Snap ring: 1 The BF12 is designed for the supported end of a ball screw and can be paired with a THK BK12 fixed-side support unit.