The collar is about 1/4" thick and thst is not enough threads to clamp down adequately I persuaded myself. So I did an 8-32 thread and it worked. 8 threads instead of 5.
UPDATE: Another disappointment: the thumbscrew holding the extension tube in the tube interface does not hold it in place square to the interface. I think the problem is that interface flange is only .5" wide and that is not holding it square even though it is very little difference in ID and OD. I think the interface should be 1" wide. I have no 1" thick pieces from which to start. I do have a 5" thick piece of CFC that I can laminate into a 1" thick piece.
No comments:
Post a Comment