Recent content by Petes

Thanks for all but it won't work, that's a right handed gear and I need a left handed one, I also preffer it to be plastic so it doesn't grind the plastic rack mechanism. I think I'll try to find someone who can make one for me but thanks again.

Unfortunately I did it already and it broke off again, now it has so much glue that I can't glue it back into its original shape.

Yeah, they just pressed it, probably explains why it broke off.

The gear is pushed in, friction, I guess it's nylon or some plastic that can expand a bit

Only pressure, it's a 4mm hole

I figured out the brand, It's a Japanese Y.K.S HOC microscope It's "vintage" and I doubt I'll find a spare part. So I guess I'll have to figure out how to get one done for me or adapt something else. The gear looks so simple, I thought I could simply google for one.

It's for a rack that moves up and down in order to focus. This is the entire mechanism The metal shaft goes into this hole in the microscope (the one between two screws) and at the top you can see where the rack goes:

Thanks for the answers. The brand looks like HOC, I included a picture. I don't know about the model. The gear drives the rack. Rack and gear: The gear goes into a 4mm metal shaft:

So I have a broken plastic pinion gear that belongs to my microscope and I'm wondering if there are standard sizes or how am I supposed to get a replacement? How do you guys find the gears you need? Seems like a pretty hard thing to find online. It's an helical pinion gear. I have the...

I'm thinking about an explanation of what dark matter is. Would it make sense to say that energy has gravity? For example when a galaxy was formed after the Big Bang a big amount of energy was converted into matter but an even greater amount of energy could have never been converted into mass...