Ball Screw with Nut SFU1204, 12 mm Diameter, 4 mm Pitch, 350 mm, Unmachined Ends
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Prices updated: 14 Oct 2026
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About this product
A 12 mm diameter ball screw with a matching nut, 4 mm pitch and 350 mm length, supplied with unmachined ends. It converts rotary motion into precise linear motion for CNC machines, 3D printers and linear axis builds. The ends must be machined to fit bearings and couplers.
Specifications
- Diameter
- 12 mm
- Pitch
- 4 mm
- Lead
- 4 mm
- Length
- 350 mm
- Ends
- Not machined
- Nut
- Included
Frequently asked questions
What do pitch and lead mean for this screw?
Both are 4 mm, which means it is a single-start screw. One full turn of the screw moves the nut 4 mm along the shaft.
Do the ends need machining before use?
Yes. The ends are not machined, so they must be turned down to the correct dimensions to fit support bearings and a coupler. Work to the bearing and motor specifications you are using.
