Worm Gear ... perhaps somebody can assist me ...

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NHSA_Rainer
Posts: 104
Joined: Mon Aug 30, 2021 3:37 pm

Worm Gear ... perhaps somebody can assist me ...

Post by NHSA_Rainer »

Hi,

I have been trying to fiddle out how to calculate a worm gear for a given worm I have here. I ahve found a lot of information but reading all that I still do not get it.

The two parameters I have is

Outside diameter of the worm is 13.5mm

The pitch or the spiral tooth is 1.27 mm

Now I want to design a 235 or whatever teeth worm gear for it. The worm gear does not really have to be a concave teeth shape. Straight teeth is good enough.

So far by trial & error and printing a 3D test piece, I have come up with the following looking at the transverse_Pitch being the same as the pitch I measured at the worm.

Anybody knows of a page with a calculator in order to correctly get the module for the Involute gear ?

Thanks Rainer

Worm_Gear.jpg
Worm_Gear.jpg (65.63 KiB) Viewed 495 times
Worm_Gear_1.jpg
Worm_Gear_1.jpg (232.02 KiB) Viewed 495 times

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OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
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