80 Tooth 25mm Bore Aluminum Timing Pulley Synchronous Wheel With M5 Screw For 3D Printer Belts And CNC Machines Top Notch Precision And Smooth Transmission For DIY Projects

Aluminum timing pulley with 25mm bore and M5 screws (single)
✔️ 25mm bore aluminum timing pulley, 2mm pitch, M5 screws included

The timing pulley is a lightweight aluminum wheel designed to mesh with timing belts for precise, synchronous motion. This pulley delivers smooth, low-noise transmission with no lubrication, featuring buffering and damping for steady operation. Widely used in mechanical transmission such as 3D printers, drilling machines, milling machines, gear machines, CNC lathes, and other DIY projects.

✅ Bore diameter: 25mm / 1 inch
✅ Max diameter: 55mm / 2.16 inch
✅ Total height: 18mm / 0.7 inch
✅ Slot width: 7mm / 0.27 inch
✅ Pitch: 2mm / 0.08 inch
✅ Thread: M5x2
✅ Package: 1 piece timing pulley wheel (with M5 screws)

💡 What is a timing pulley used for in belt-driven machines like 3D printers and CNCs?

A quick overview of its role in such systems:

- precise belt engagement for synchronized motion
- maintains belt timing to avoid slip in belt-driven machines
- compatible with 25mm bore, 2mm pitch and M5 mounting
- common in 3D printers, mills, and lathes
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