- Joined
- Dec 18, 2019
- Messages
- 6,447
The reamer set I got yesterday don't seem to be on size. I just tested them, but maybe I am measuring them wrong. I was using my QuantuMike across the widest point (cutting edge) near the main cutting tip. What is the right way to measure them?
The under sizes are supposed to be 0.001" under the "nominal" dimension. One reamer measures 2.5 tenths under the spec. (That's a pass to me.) All others are at least 0.001" over the marking on the reamers. Can't seem to win at this game, at least not playing the cheapskate card...
0.4990 measures 0.500x, 0.3740 measures 0.375x, 0.2490 measures 0.250x, etc.
Are my expectations valid that if a reamer is marked 0.2490 that it ought to be within a 2-3 tenths of that? 5 tenths, worst case? What the heck is the 4th digit for, if it isn't held?
The under sizes are supposed to be 0.001" under the "nominal" dimension. One reamer measures 2.5 tenths under the spec. (That's a pass to me.) All others are at least 0.001" over the marking on the reamers. Can't seem to win at this game, at least not playing the cheapskate card...
0.4990 measures 0.500x, 0.3740 measures 0.375x, 0.2490 measures 0.250x, etc.
Are my expectations valid that if a reamer is marked 0.2490 that it ought to be within a 2-3 tenths of that? 5 tenths, worst case? What the heck is the 4th digit for, if it isn't held?