Knurling tool modification

[mklotz]

For larger diameters many folks, if they initially get a doubled knurl, just keep pushing the tool deeper until it reaches a diameter where correct diamonds form. This leaves a botched section at the start of the knurl which demands removal.

For smaller diameters this bullish approach doesn't work as well, especially if a push knurler is in use.

I've had a number of bad knurls forming without using the correct diameter; I've never had that happen when using the computed correct diameter.