I have a set of Starrett depth mic's. These are the rod type and I need to know how to zero the thimble. I am using a gage block and a surface plate. There doesn't seem to be anywhere where the graduated spindle turns like it does on an outside mic. Also, the wrench that fits the nut inside of the thimble seems to adjust the pressure required to turn the thimble. The only other thing I can think of adjusting is the stop nut on the rod. These seem to be loctited on and are not movable. Any advice on getting these zeroed would be greatly appreciated. Thanks, Steve
- posted
18 years ago