24 : 1
24 : 1 · 12 DP
12 DP · 20° · ZA
A 12 DP single-start worm on a ¼" shaft driving a 24-tooth wheel on ½", Boston Gear style.
Sample · 8 DP · 20° · ZA
40 : 1 · 8 DP
An 8 DP worm on a ½" shaft and a 40-tooth wheel on ¾", keyed.
What's in this design
Worm · 1 start
- 1 start, right hand · tip Ø38.1, pitch Ø31.75, root Ø24.4 mm · 53 mm long · bore ؽ" · no hub
Wheel · 40 teeth
- 40 teeth, throated · outside Ø135.25, pitch Ø127 mm · face 26 mm · bore ؾ", keyway 3⁄16" wide · no hub
The mesh · 8 DP · 20° · ZA
- ratio 40 : 1 · centre distance 79.375 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
15 : 1
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.