- Joined
- Sep 28, 2013
- Messages
- 40
Just bought a K&E 42" Jacob's Parallel Straightedge for $5. It's just beautiful. Fine grain mahogany and maple with a plastic edge. For drawing parallel lines with a drafting machine. Cool looking.
Regarding accuracy of micrometers, I tried to get the print dimensions as close as I could. Then the company inspector would use his mike like a C-Clamp. Squeeze it till it wouldn't move any more... and say I was under size. So accuracy in hand tools was sometimes subjective. Went to school on that and corrected any dimension error beforehand on the gang mill where the run was 40,000. Then had to deburr each one on a Ladish? machine. That's why I went back to school! But wish I was still there now.
BB
Regarding accuracy of micrometers, I tried to get the print dimensions as close as I could. Then the company inspector would use his mike like a C-Clamp. Squeeze it till it wouldn't move any more... and say I was under size. So accuracy in hand tools was sometimes subjective. Went to school on that and corrected any dimension error beforehand on the gang mill where the run was 40,000. Then had to deburr each one on a Ladish? machine. That's why I went back to school! But wish I was still there now.
BB