Creality Sermoon D3 Y axis synchronous belt kit

When the Y-axis of your Creality Sermoon D3 starts to slip or lose precision, print quality suffers. This synchronous belt kit restores consistent motion, eliminating layer shifts and banding caused by worn or damaged belts and pulleys.

Who is it for

This kit is for Creality Sermoon D3 owners who need to replace a stretched belt, worn pulley, or noisy idler. It is also useful for preventative maintenance, ensuring the printer continues to produce accurate parts over time.

Main features

• Complete Y-axis motion solution: includes GT2 belt, motor pulley, and two smooth idlers.
• Fiberglass-reinforced rubber belt resists stretching for long-term accuracy.
• Aluminum alloy pulleys with 625ZZ bearings provide smooth, quiet operation.
• Direct replacement for original Creality Sermoon D3 parts—no modification needed.
• Mounting hardware included for straightforward installation.

Specifications

• Compatibility: Creality Sermoon D3 3D Printer
• Axis: Y-axis
• Belt type: GT2 synchronous belt
• Belt material: Fiberglass reinforced rubber
• Belt pitch: 2 mm
• Belt width: 6 mm
• Belt length: Optimized for Creality Sermoon D3 Y-axis
• Number of belts: 1
• Pulley type: GT2 synchronous pulley
• Pulley material: Aluminum alloy
• Pulley bore diameter: 5 mm
• Pulley teeth: 20T
• Number of pulleys: 1 (motor pulley)
• Idler type: Smooth idler pulley
• Idler material: Aluminum alloy
• Number of idlers: 2
• Idler bearing type: 625ZZ
• Kit contents: 1x GT2 synchronous belt, 1x GT2 motor pulley, 2x smooth idler pulleys, mounting hardware

Tips

Before installation, clean the Y-axis rail and check for debris. Tension the belt so it produces a low twang when plucked—too tight causes premature wear, too loose leads to ghosting. After replacement, run a test print to verify layer alignment.