PART OF MY INDUSTRIAL GEARBOX COLLECTION

This is a fully 3D printable version of an industrial worm gearbox / gear reducer. This cutaway version can be used for training purposes, and has a gear ratio of 1:30

Worm gears
A worm gear consists of a “worm” and a “worm gear”. The worm is a gear with a screw-like shape, when the worm turns 360 degrees the worm gear rotates 1 teeth. Worm gear reducers are typically used in applications that requires high speed reduction when space is limited. Another advantage of the worm gear is that “back driving” is nearly impossible.

No additional hardware needed!

UPDATE 7-16-2018
I`ve added a cap that can make the gearbox non-cutaway, see the green parts in the fourth picture. When you want the gearbox to be non-cutaway, you have to print the 2 files named with NON-CUTAWAY.

Print settings
Worm Gear
Support: No
Infill: 40 – 60 %
Layer height: 0.1 – 0.3 mm

Worm
Support: Maybe
Infill: 40 – 60 %
Layer height: 0.1 – 0.3 mm

Axle (Rim, Skirt or raft might needed)
Support: No
Infill: 40 – 60 %
Layer height: 0.1 – 0.3 mm

Handle
Support: No
Infill: 40 – 60 %
Layer height: 0.1 – 0.3 mm

Housing
Support: No
Infill: 20 – 40 %
Layer height: 0.1 – 0.3 mm

Housing_bottom
Support: No
Infill: 20 – 40 %
Layer height: 0.1 – 0.3 mm

Housing _top
Support: No
Infill: 20 – 40 %
Layer height: 0.1 – 0.3 mm

Spacer big
Support: No
Infill: 20 – 40 %
Layer height: 0.1 – 0.3 mm

Spacer small
Support: No
Infill: 20 – 40 %
Layer height: 0.1 – 0.3 mm

Stop
Support: No
Infill: 20 – 40 %
Layer height: 0.1 – 0.3 mm

NON-CUTAWAY house
Support: No
Infill: 20 – 40 %
Layer height: 0.1 – 0.3 mm

NON-CUTAWAY top
Support: No
Infill: 20 – 40 %
Layer height: 0.1 – 0.3 mm

The clearances of this model are between 0.2 - 0.4 mm (0.008 – 0.016 inch). You might need to drill out the holes for the axles (9 mm), or sand some of the parts to make them fit.

LarsRb