tapmatic

I put together a Google Sheets spreadsheet to automate Tapmatic's tapping recommended speeds & feeds, RPM adjustment factors, minimum required torque & horsepower, etc. The spreadsheet is here: https://docs.google.com/spreadsheets/d/16MPFCAvBzhTM1Sc9MnQwcvhcceaTQ26m7MhIoyBVxJk/edit?usp=sharing...

I've owned this tapmatic for quite a while now and use it about twice a year when I have lots of threading to do. It is always a joy to use. This time around I have to tap about 750 x 8-32 threaded holes. For those that have not seen one in action, here you are. Shown at about 400 RPM...