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40T-15W-N18 — 3M Timing Pulley, 18mm Keyed Bore
40T-15W-N18 — 3M Timing Pulley, 18mm Keyed Bore
A 40-tooth timing pulley for 15mm wide 3M belts, with a 18mm keyed bore and a 6 × 2.8mm keyway. The flanged body guides the belt through a compact drive assembly, making this configuration useful for CNC, automation and general machinery with a matching timing-belt system.
40T-15W-N18 quick reference
Approximate drawing dimensions — verify the supplied pulley before machining40T-15W-N18 dimensional data sheet
Supplier-adapted dimensional reference for the 18mm keyed-bore variant, including the 6 × 2.8mm keyway. The 17mm dimension is the toothed groove width; nominal belt width is 15mm. Select the image for a full-size view and verify the supplied pulley before final machining.
Why use the 40T-15W-N18 pulley?
- 40 teeth provide a defined pulley ratio when paired with the selected mating pulley.
- Designed around a 15mm wide timing belt for a compact belt-drive layout.
- Flanges help guide the belt when the pulleys are correctly aligned.
- A 18mm keyed bore provides a keyed connection to a matching shaft, with a 6 × 2.8mm keyway shown on the drawing.
- The Ø42mm flange and 28mm overall height provide useful reference dimensions when planning drive clearances.
Approximate technical dimensions
| Model | Bore Ø | Flange Ø | Hub Ø | Tooth OD | Groove width | Overall height | Keyway |
|---|---|---|---|---|---|---|---|
| 40T-15W-N18 | 18mm | 42mm | 30mm | 37.44mm | 17mm | 28mm | 6 × 2.8mm |
Reference: User-confirmed 40T dimensions: Ø42mm flange OD, Ø30mm hub OD, Ø37.44mm tooth OD, 17mm toothed width and 28mm overall height. Measure the supplied pulley and shaft before final machining.
Australia-wide supply
NCMASTER supplies timing-drive components for customers across Victoria, New South Wales, Queensland, South Australia, Western Australia, Tasmania, the Australian Capital Territory and the Northern Territory.
For help matching this 18mm keyed-bore pulley to your drive, provide the belt profile, belt width and shaft dimensions.
