15 : 1
15 : 1 · normal module 4, ZI
m_n 4 · 20° · ZI
A two-start involute worm sized in the normal system (m_n 4), on keyed 16 mm and 25 mm shafts.
Sample · m 3 · 20° · ZA
40 : 1 · module 3, keyed
A module 3 single-start drive on keyed 12 mm and 20 mm shafts, the wheel throated to wrap the worm.
What's in this design
Worm · 1 start
- 1 start, right hand · tip Ø36, pitch Ø30, root Ø22.5 mm · 50 mm long · bore Ø12 mm, keyway 4 mm wide · no hub
Wheel · 40 teeth
- 40 teeth, throated · outside Ø129, pitch Ø120 mm · face 24.5 mm · bore Ø20 mm, keyway 6 mm wide · no hub
The mesh · m 3 · 20° · ZA
- ratio 40 : 1 · centre distance 75 mm · lead angle 5.71° · efficiency 65 % (μ 0.05) · back-drivable
The link opens the worm and wheel in the Worm Gear Designer's 3D view. Change the module or pitch, the starts, the wheel's teeth, the bores or hubs, then download STL or STEP.
More samples
Related worm drives
50 : 1
50 : 1 · module 5, ground ZK
m 5 · 20° · ZK
A module 5 worm with a disc-cutter-ground (ZK) thread driving a 50-tooth wheel on a keyed 30 mm shaft.
30 : 1
30 : 1 · module 2, one start
m 2 · 20° · ZA
The starter drive: a single-start module 2 worm turning a 30-tooth throated wheel, 30 : 1.
40 : 1
40 : 1 · module 1.5 on D-flat shafts
m 1.5 · 20° · ZA
A printable 40 : 1 reduction on 5 mm and 8 mm D-flat shafts, with 0.1 mm print compensation on both parts.