SBR12UU Linear Motion Ball Bearing Block 12mm for CNC and 3D Printers
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Prices updated: 13 Oct 2026
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About this product
SBR12UU is a linear ball bearing block with a 12 mm inner bore, used to carry carriages along 12 mm linear rails in CNC machines and 3D printers. It has 4 mm screw holes for mounting and a metal and rubber construction. It is suited to replacing worn bearings and keeping linear axes moving smoothly with low friction.
Specifications
- Model
- SBR12UU
- Inner diameter
- 12mm
- Screw hole diameter
- 4mm
- Overall size
- 39 x 39 x 27mm
- Mounting pitch
- 27 x 28mm
- Material
- Metal, Rubber
Frequently asked questions
Which rail does this bearing block fit?
It is designed for 12 mm linear rails, such as the SBR12 rail, and its 12 mm inner bore must match the rail diameter.
How is it mounted?
Fix it to the carriage through its 4 mm screw holes using screws of matching size. Align the 27 x 28 mm mounting pattern with the plate or carriage it is bolted to.
