BK12 + BF12 Ballscrew Support Set

BK12 + BF12 Ball Screw Support Set 

The BK12 + BF12 support set consists of matched end-support bearing units used to mount and support a ball screw shaft at both ends, ensuring smooth, stable, and accurate linear motion. This set is commonly used with 12mm series ball screws (such as SFU1204/1605 range, depending on shaft compatibility).

Set Includes:

• BK12 (Fixed Side Support): Houses angular contact bearings that handle axial thrust loads and fix the screw shaft's position, preventing axial movement.
• BF12 (Floating Side Support): Allows slight axial movement to compensate for thermal expansion and shaft length variation, supporting radial load only.

Key Features:

• Provides rigid end-support for ball screw shafts, improving rotational accuracy
• Reduces shaft whip/vibration at higher speeds
• Fixed + Floating combination allows thermal expansion without binding
• Easy to mount on machine frame/base with standard bolt pattern
• Suitable for CNC machines, 3D printers, engraving machines, and automation equipment

Compatible Shaft Diameter: 12 mm 

Material: Cast iron / Steel housing with precision bearings

Note: BK (fixed) side must be installed on the driving/motor end, and BF (floating) side on the opposite end, for correct load handling and smooth operation.