BF10 THK Ball Screw Support Unit

THK square supported-side unit for ball screws with an 8 mm bearing journal diameter.

The BF10 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: 8 mm
Bearing type: Deep-groove ball bearing
Bearing used: 608ZZ
Preload: Without preload
Snap ring: C8
Weight: 0.290 kg
Country of origin: Japan

Main dimensions

Shaft diameter d: 8 mm
Overall length L: 20 mm
Housing width B: 60 mm
Housing height H: 39 mm
Housing thickness b: 30 mm
Shaft centre height h1: 22 mm ±0.02 mm
B1: 34 mm
H1: 32.5 mm
E: 15 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: 5 mm
Retaining diameter d3: 5.5 mm

Load ratings

Basic dynamic radial load rating C: 3.35 kN
Basic static radial load rating C0: 1.4 kN

Components supplied

Housing: 1
Deep-groove ball bearing: 1
Snap ring: 1

The BF10 is designed for the supported end of a ball screw and can be paired with a THK BK10 fixed-side support unit.