- Joined
- Oct 5, 2010
- Messages
- 1,050
I picked these up today. I purchased a lot of used tooling from the widow of an old machinist. It was a mixture of fine old Starrett stuff to some late model Chicom crap.
These were bagged up separately. They don't look like they were shop made. There is no maker mark or any other marking on them. The profile is a stepped triangle. Each is bored 3/8" thru with brass thumb screws which would secure the triangles to a 3/8 rod. One has a second parallel threaded hole about half way through. The largest flat surface has a steel ball attached to it.
I am thinking it is some type of trammel for measuring the distance between bolt holes, but that is just a guess. Does anybody know what these are?
Randy
These were bagged up separately. They don't look like they were shop made. There is no maker mark or any other marking on them. The profile is a stepped triangle. Each is bored 3/8" thru with brass thumb screws which would secure the triangles to a 3/8 rod. One has a second parallel threaded hole about half way through. The largest flat surface has a steel ball attached to it.
I am thinking it is some type of trammel for measuring the distance between bolt holes, but that is just a guess. Does anybody know what these are?
Randy