Hi,
I've inherited my grandfather's 0-1" micrometer (an older style M&W – model No.961SB) and am trying to adjust it to get rid of an error of about 3/10 of one thou that's showing-up when zeroing.
If I'm understanding the adjustment technique correctly, then I should be trying to use the spanner with the small pin to rotate the sleeve by the required amount – only problem is, the sleeve doesn't want to move and the hole that takes the pin of the spanner is elongated (worn?) meaning that the pin keeps slipping out.
If anyone can offer advice on a way around this, I'd be very grateful.
PS: I know that the 'B' on the end of the model number means the micrometer is graduated in tenths-of-a-thou, but what does the 'S' stand for?
Cheers
Anthony