50 : 1
50 : 1 lift · self-locking
m 2 · 20° · ZA
A slim single-start worm (q 20) whose small lead angle holds the load when the motor stops.

A fine module 1 indexing drive: 60 : 1, self-locking, on 6 mm and 8 mm shafts.
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.
m 2 · 20° · ZA
A slim single-start worm (q 20) whose small lead angle holds the load when the motor stops.
16 DP · 20° · ZA
A 16 DP self-locking lift worm (q 22) with a 40-tooth wheel on a ⅜" shaft.
m 2 · 20° · ZA
The starter drive: a single-start module 2 worm turning a 30-tooth throated wheel, 30 : 1.
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.