- Joined
- Aug 21, 2013
- Messages
- 27
HELP. Does anyone know how the anvil lock works on these micrometers?
I picked up a thread micrometer at the flea market. It has the replaceable anvils so it needs to be recalibrated after changing anvils. The anvil that goes in left end is adjusted by hand in or out as needed to re-zero and locked down with the thumb lock. The lock however doesn’t work and I can’t figure out how it is supposed to work.
I’m trying to understand how the locking mechanism is intended to work, but I’m at a loss. There’s nothing that bears down on the replaceable anvils to lock them in place. Nothing appears to be missing from the mechanism.
The thumb lock appears to do nothing. It doesn’t enter the barrel and doesn’t even arrear to contact the barrel at all.
There is a moveable ball bearing that is a perfect slip fit on the inside of the barrel.
I picked up a thread micrometer at the flea market. It has the replaceable anvils so it needs to be recalibrated after changing anvils. The anvil that goes in left end is adjusted by hand in or out as needed to re-zero and locked down with the thumb lock. The lock however doesn’t work and I can’t figure out how it is supposed to work.
I’m trying to understand how the locking mechanism is intended to work, but I’m at a loss. There’s nothing that bears down on the replaceable anvils to lock them in place. Nothing appears to be missing from the mechanism.
The thumb lock appears to do nothing. It doesn’t enter the barrel and doesn’t even arrear to contact the barrel at all.
There is a moveable ball bearing that is a perfect slip fit on the inside of the barrel.