12 years ago
It was a local sale.
I would like to drill and tap them with 5/16" drill and 3/8" tap, say
spaced at 1" interval. That makes for about 200 holes to be drilled
and tapped on my CNC mill.
1. What is the best way to drill aluminum with 5/16" drill bit, making
through holes. What RPM and feedrate and how often to peck.
2. Do I need to center drill those holes first? It is not really a big
deal, just some more G codes.
3. For tapping, can I safely use a ER colleted floating tap holder that has a
little bit of vertical internal travel. Like this one: