- Joined
- Nov 17, 2017
- Messages
- 1,525
A very old telescope has come into my possession in order to be repaired back into working order. I would like to leave the telescope in 1840's condition while restoring its functionality to new.
I have two problems I don't quite know how to deal with::
a) A large (2.3") narrow pitch thread (~1mm) in what appears to be 0.030 brass that has been enlarged such that it no longer fits with it's other mating side. I need to make one end bigger or the other end smaller without marring the brass or harming the threads. Only a dozen thou of alteration seems necessary. Anyone have an Idea as to how I can do this?
b) a brass bushing soldered to a threaded cap has broken its solder joint. The bushing has several obvious an purposely positioned indentations that I assume are there to set tension on the bushing as the telescoping tubes extend and compress. I can solder the tube back, but it is riding on the tube that slide on it roughly and I should like to take the indentations out, set the sliding fit, and then adjust tension. Any comments on how to reduce the indentations without marring the brass?
Pictures when I get around to them.
I have two problems I don't quite know how to deal with::
a) A large (2.3") narrow pitch thread (~1mm) in what appears to be 0.030 brass that has been enlarged such that it no longer fits with it's other mating side. I need to make one end bigger or the other end smaller without marring the brass or harming the threads. Only a dozen thou of alteration seems necessary. Anyone have an Idea as to how I can do this?
b) a brass bushing soldered to a threaded cap has broken its solder joint. The bushing has several obvious an purposely positioned indentations that I assume are there to set tension on the bushing as the telescoping tubes extend and compress. I can solder the tube back, but it is riding on the tube that slide on it roughly and I should like to take the indentations out, set the sliding fit, and then adjust tension. Any comments on how to reduce the indentations without marring the brass?
Pictures when I get around to them.