Why is my end mill and coin overheating?
I use my Boxzy to cut and build magic effects for magicians. It does a wonderful job with cutting the wood. My biggest problem is I use coins that are brass with about a 30 micron nickel plate. The process I try to run is very simple and straight forward. I need to cut a 1” hole in the coin, using a 1/4” bit. It’s a simple 1” in diameter path that I configure in Easel to follow along the path. Cutting per pass is 0.050 mm, the Makita is running at setting 4.
After about the 3rd pass the end mill and coin get so hot they are glowing orange, which in turns burns the jig and I have to start all over again from the jig to the pockets. My feed rate is 127mm and plunge is 76.2
What am I doing wrong? Thank you in advance for any input.
Is this a good question?