Just realized my old shop in Dayton taught me the wrong way to check tool runout

I mean, for like 5 years I was just using a dial indicator on the shank and calling it good. Then I saw a guy at a trade show in Cleveland put the indicator right on the cutting edge while the spindle was running at 500 rpm. The difference was 0.0008 inches, which is huge for finishing passes. Idk, maybe it's just me but that one demo changed how I set up every job now. Has anyone else had a shop teach them a method that was just totally off?

2 comments

2 Comments

chen.luna2d ago

Used to do that too, mind blown.

finley_harris51d ago

What finally clicked for you? I got stuck in that loop for ages until I set a hard daily limit on checking. Putting my phone in another room for a couple hours in the evening was the only thing that broke the habit. It felt weird at first but now I don't even think about it.