O.K., so I should get a double cut steel bit rather than an aluminum bit. confused

Originally Posted by TRENDZ
You can’t be size on size with a burr bit. The bit always needs to be smaller than the radius, or you will get impossible to control chatter.


If the hole is 1/2" diameter, what would you suggest for the diameter of the bit, 1/4", 3/8"? This is my first (and probably last) time doing this so please excuse my lack of knowledge on the subject.