OT - Things you might never need to know.

Thanks for the info

I studied cams and gears as part of my 4th year mechanical engineering course years ago at the U of Manitoba. I've forgotten most of what I learned back then, but I still remember the basic principles. I guess that applies to everything. No matter what you learn, you eventually forget the details, but you always remember the principles.

Well , I was an electrical engineering student so never studied gears... but I did learn that most of the principles of electrical engineering could be applied to mechanical engineering (and visa versa)

Perhaps gears and transformers are analogous as they transfer and convert power efficiently.

I've never need to know that. But like a lot of other facts, it is interesting to know. Thanks for posting it. I'll pass it on to a couple of others that may find it of interest too.

I feel stupid today, but to me the Wikipedia .gif shows 'constant' speed transfer, NOT very low friction.

It looked like a lot of sliding along each tooth, but importantly there was absolutely NO variation in rotational speed for each gear's shaft.

Years ago, I noticed "hypoid gear oil" for sale at the auto parts. I asked he twenty something behind the counter was hypoid gear oil all about. He said it had to do with the viscosity. I asked a mechanic who knows a bit out these things, and he explained that the gears were cut in the shape of a hyperbola, and that made the energy transfer more efficient. Hmm.

Yes, that's a common experience. If you ask any store employee a question, and they don't know the answer, they'll think up one for you.

It's a service they provide free of charge so that their customers don't have to think up an answer themselves.

I kinda feel embarrassed offering up this information on involute gear teeth, and then finding out I was wrong, but I know that no one in here believes that I had anything but the best of intentions.

We know you well enough to forgive small mistayks.

Wish the guy was still there, I'd go ask for a hypoid-dermic syringe.

Don't STOP! I saved that little animated gif from Wikipedia. And for the first time, I marveled out just how difficult true gear design must be. Think about the vibration potential as the gears wear and the transferring shaft speed starts to become modulated. Arrgg! And I thought electronics was fraught with peril.

I was a math major but worked evenings on a machine that cut the teeth into the gear blanks. Very interesting process.

A few of my customers were gear manufacturers so I got to see them being made.