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30T-15W-8B — 3M Toothed Idler Pulley
30T-15W-8B — 3M Toothed Idler Pulley
A compact bearing-supported idler for guiding a 15mm timing belt around a fixed Ø8mm mounting point. The toothed running surface follows the matching belt teeth, while twin flanges help retain the belt through direction changes and tensioner assemblies.
30T-15W-8B quick reference
Adapted dimensions — verify the supplied part before final machining30T Idler dimensional data sheet
English supplier drawing adapted to the Ø8mm bore variant. Select the image to view the full-size NCMASTER reference. Body dimensions are carried over from the supplier reference; bearing appearance is illustrative.
Why use a 30T toothed idler?
- Guides the toothed side of a matching timing belt around a return path or direction change.
- Provides a rotating contact point for a correctly designed fixed or adjustable tensioner.
- The centre bearing lets the pulley turn around its mounting point without clamping to a drive shaft.
- Twin flanges help keep the belt aligned across the running surface.
- Useful for CNC routers, robotics, positioning stages and general belt-driven automation.
Approximate technical dimensions
| Model | Bearing bore | Belt width | Teeth | Tooth OD* | Flange OD* | Groove width* | Overall width* |
|---|---|---|---|---|---|---|---|
| 30T-15W-8B | Ø8mm | 15mm | 30 | 27.89mm | 32mm | 17mm | 21mm |
Important: *Body dimensions are adapted supplier-reference values, not measurements of this bore variant. The 17mm groove / 21mm overall option is interpreted from the supplier chart. Verify the supplied part before machining spacers, guards or a tightly toleranced mounting assembly.
Australia-wide supply
NCMASTER supplies timing-belt hardware for CNC and automation projects, with delivery available across Victoria, New South Wales, Queensland, South Australia, Western Australia, Tasmania, the Australian Capital Territory and the Northern Territory.
Match the belt, drive pulleys and idlers as one compatible system, checking tooth profile, belt width and mounting dimensions before ordering.
