The S&G combo lock on my old Treadlock safe (cheap gun safe) 
was getting flaky.  I had a locksmith out to fix it, but he 
declined, saying Tread had modified the S&G bolt by drilling 
and attaching the bolt operating mechanism, and any replacement 
lock woul

I didn't feel like buying a new safe, so I made an operating 
bolt and installed, plus a new electronic lock.  Took several 
hours one day to fab, part of another to assemble and test.

Treadlock01.jpg		parts
Treadlock02.jpg		unlock position
Treadlock03.jpg		lock position
Treadlock04.jpg		clamped to door through operating shaft tube
Treadlock05.jpg		welded, assembled, and greased
Treadlock06.jpg		closeup of attachment to original lock mechanism
Treadlock07.jpg		electronic lock installed
Treadlock08.jpg		operating handle and keypad

Pete Keillor