20T Idler Bore 5mm Width 6mm by Runice
$5.49
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Runice 20T toothed GT2 idler for 6 mm belts. This silver aluminum idler pulley uses a 5 mm bore and 20-tooth 2GT profile for compact motion systems that need a bearing-supported belt return instead of a drive pulley.
Why use a toothed idler here?
- Toothed profile keeps the belt engaged through the return path instead of riding on a smooth surface.
- 6 mm belt width fits common GT2/2GT motion layouts used in Voron-class and other CoreXY printer builds.
- 5 mm bore matches common shoulder-bolt/idler-stack hardware; use proper shims so the bearing is not side-loaded.
Specifications
- Brand: Runice
- Runice MPN: P20-2GT-6-A-P5-H10(MR95ZZ)A007
- Profile: 2GT / GT2, toothed idler
- Tooth count: 20T
- Belt width: 6 mm
- Bore: 5 mm
- Finish/color: silver aluminum
Fitment and pairing
Use this as the silver 6 mm 20T idler in GT2 belt paths. If you need the matching drive pulley, see the Runice 20T 5 mm bore / 6 mm belt pulley. If you want the same idler in black, see the black Runice 20T 6 mm idler.
Not for
- 9 mm belt paths — use a 9 mm idler instead.
- Drive shafts — this is an idler, not a toothed drive pulley.
- Axial loading — do not clamp the bearing stack so tightly that the idler binds.
