I need to insert this into the center of a gear. It's part of exercise equipment with a common fault described at the bottom of this page.

I've never done anything like this before and don't know how to remove the part from the gear or get this new part into it. There's no instructions online that seem to apply.

ANY help appreciated.

Spacely Space Sprocket FTW!

BTW Cogswell sucks. They dump half their coupons and have a three-broken-tooth return minimum.

If the pulley is cracked you should be able to push the old roller out with a screwdriver or your finger. Otherwise you wouldn't need the cold weld to hold the new one in place.

Is the gear metal or another material? Ideally I'd say heat the gear in an oven and throw the bearing in the freezer, then quickly stick the bearing into the gear.

To get the old one out, I'd cut the bearing with a hack saw blade (if you can get it in there) and then use a socket to press it out. Find one as close to exactly the size of the hole as possible. Either use an extension and smack it with a hammer or a second larger socket and a vice or large C-clamp. You want to have the second socket large enough that the bearing and other socket can slide into it.

soundtechie said:Kandykornhead said:Spacely Space Sprocket FTW!

BTW Cogswell sucks. They dump half their coupons and have a three-broken-tooth return minimum.


two broken teeth and need three? that can be fixed with a hammer. I had in mind Newegg's dead pixel minimum. It never occurred to me that evil consumers might try to make MORE dead pixels so they could return a monitor. Do people do this? Just curious.

Depends. On really small things, a mini hacksaw. On larger, a regular hacksaw. Number of teeth per inch depends what kind of cut you're after and the material...or just what I have handy. For steel, 12TPI or so is good.