Just a Sparky
Hot Rolled
- Joined
- May 2, 2020
- Location
- Minnesota
I recently picked up a rare example of a Century repulsion start bench grinder/buffer. Upon inspection it looks as though it has suffered some minor overheating of the commutator. Some solder has flung out from the winding terminations since these were soldered instead of staked on but everything still ohms out just fine.
The other point of concern is that it does not transition from repulsion to induction correctly. It looks like the parallel motion fingers (#32, Pages 12 & 13) have worn down to the point where they no longer make positive contact with the spring barrel ring (#55). I will need to manufacture some replacements, which entails removing the rivets holding the existing ones in place so I can trace them.
Are there any good tricks out there for keeping rivets from spinning while they are being drilled out?
The other point of concern is that it does not transition from repulsion to induction correctly. It looks like the parallel motion fingers (#32, Pages 12 & 13) have worn down to the point where they no longer make positive contact with the spring barrel ring (#55). I will need to manufacture some replacements, which entails removing the rivets holding the existing ones in place so I can trace them.
Are there any good tricks out there for keeping rivets from spinning while they are being drilled out?
