Worm Wheel (module 2, 30 teeth)
The wheel for the module-2 worm above: 30 teeth, 60mm pitch diameter, 64mm over the tips, 10mm face, 8mm bore, cut at a 7.1° helix — the worm's own lead angle, which is what makes the pair mesh on 90° crossed axes. 38mm centres, 30:1 in one stage. Worth being straight about what it is: a helical spur wheel, not a throated one. A proper worm wheel is hobbed with the worm's own form so its rim wraps around the worm and the two touch along a line; this one touches at a point, so it will carry less than a cut wheel. It is also what almost every printed worm drive actually is. Throating it needs a variable-radius profile per layer and a hob simulation, which is a different piece of work and not what this is. Prints flat; at 7.1° the helix barely leans, so no support. Nylon or PETG against a PETG worm.
from £7.75example, in PLA
Example pricing
A guide only — not a fixed quote. Final price depends on material, quantity, print orientation and printability.
| Material | 1 unit | 5 units | 10 units | 25 units |
|---|---|---|---|---|
| PLA | £7.75 | £32.53£6.51/unit | £58.87£5.89/unit | £131.68£5.27/unit |
| PETG | £8.13 | £34.15£6.83/unit | £61.80£6.18/unit | £138.24£5.53/unit |
| ABS / ASA | £8.97 | £37.66£7.53/unit | £68.16£6.82/unit | £152.45£6.10/unit |
Per-unit prices fall with quantity. Larger batches are cheaper still — ask for a bulk quote.