SFU1204 400mm Rolled Ballscrew Ballnut With Low Backlash For Smooth Precise Linear Actuation Without End Supports Ideal For DIY CNC Rigs 3D Printing And Automated Motion Projects

400mm rolled ballscrew ballnut with low backlash precision
✔️ Total length 400mm, screw diameter 12mm, pitch 4mm, weight ~367g

The 400mm SFU1204 rolled ballscrew ballnut delivers low friction, high-precision linear motion for DIY CNC rigs, 3D printers, and automated motion projects. It is designed for use without end supports and pairs with a 12mm screw diameter and 4mm pitch.

✅ Total length: 400mm
✅ Screw diameter: 12mm
✅ Screw pitch: 4mm
✅ Weight: ~367g
✅ Color: Silver

💡 What is a rolled ballscrew ballnut and why does low backlash matter for precise linear motion in CNC and 3D printing?

Here's a quick breakdown:

* Low backlash minimizes stick-slip and improves repeatable positioning * Rolled ball mechanism provides high transmission efficiency and smoother motion * 12mm screw diameter and 4mm pitch align with common DIY CNC and 3D printer builds ✝️