Worm Gears Explained, Calculated & Modeled

In this video we first hand draw a basic worm gear meshed with a worm wheel. Then we take a look at the function of a worm gear assembly and how to find the gear ratio of a worm gear assembly. Then we take a look at a 3d rendering a worm gear and worm wheel animated in Autodesk Inventor.

The subject of Worm Gears often come up in both high school and college physics and engineering classes. They are found in Project Lead the Way (PLTW), Principles of Engineering (POE), and AP Physics.

[callumross]

only 40 seconds in, and oh my god the effort you put into that drawing is crazy. respect

[robertqueberg]

I am not generally highly impressionable. But in your case, I am making a large exception. This presentation removed the confusion that I have had with worm gears. I am coming back for more of your information and enlightenment. Thank you. You should market the “cad system” that drew your opening graphics. Again, thank you.

[Amdraz]

Outstanding drafting skills! And a good explanation too.

As a side note you could definitely do a series of these in real time with the sound on and call them ASMR.

[jeremiahscott]

Phenomenal video! Great explanation and presentation

[narendradesilva]

Brilliant drawing skills, and great explanation, thanks.

[Shabazza]

Another excellent explanation.
Little side note: A worm gear assembly is basically self-locking.
The worm wheel cannot (back-)drive the worm. Only the worm can drive the wheel due to inherent friction and direction of forces.
Can be desired or not. But if you want to use it, you should be aware of this.

[ibrahimal-saif]

My god the drawing is so satisfying to watch

[predoshabido]

I didn't expect to have an advantage in slowing down the rotations in the bigger gear by put the worm, but then you reminded me of tork.

[jmy]

What a nice explanation and hand writting. Thanks for introducing worm gear advantages.

[alf]

man this is probably one of the more difficult things to model in CAD, is there some video in detail about dimensioning the gears and teeth, of both parts? meshing and stuff

[josphatwahiu]

I really enjoy the art and content of this channel 👍❤️

[MaryThompson]

What are the names of the templates you're using to make that awesome drawing?

[DanielDimov]

I think it's a visual illusion. The teeth of the worm aren't really moving. It's the edges that are inclined.

[Mooe]

I would like to ask you about, what are the differences between putting the warm speed reducer on the input (filling material) and on the output (where the material is being discharged “

[ChandraAwesome]

Thanks bro
Finally I got understand this relation.

[munnachakra]

Hai, wonderful vedio. I have 2 questions for you. Does the worm and roller require grease or steering oil of ranges 140 or 300 or 450 or 600. By second question is does the worm and roller make driving more effortless than circulating ball bearing also called as ball and nut or is the recirculating ball mechanism more effortless than the worn and roller. As I had a fiat 118 NE which was the 124 fitted with the Nissan A12 engine which had the recirculating ball mechanism which was smooth like butter, I still regret for having sold it. It was so smooth even though it didn't have power assistance

[matthewdominy]

Great video, can you help me with some worm ratios. I’m making an ebike and using a worm gear with motor to power it, I have a motor that spins at 3500 rpm and would like an output of 350 rpm.
I’m looking at a NMRV030 gearbox.
What ratio would I need for an input of 3500rpm to get an out put rpm of 350?
10:1?
Many thanks

[dragade]

If you could design your own tools (especially disregarding costs) would you prefer power tools to have worm gears, wholistically than a hyper specific tool? Say if you wanted to design a circular saw and choose if its direct drive or not (for I assume worm gears would overall provide, on average, less RPM while giving you higher torque and maybe more suited through going into hardwoods) (also direct drive might be more cost effective and probably ideal for small drill bits that you need wicked fast RPMs to have the correct cutting speeds but this being a niche case?).

Thanks!

[kizgintosbaga]

i get it, i get it thanks to your amazing explanation skillls. thank you

[taonasheshadrick]

nice drawings bro... you take your time