Suggestions CNC BITS ?!?!

[SkyHighSigns]

I was wondering what is the best bit companies use to cut .040 metal with, i will be cutting out individual letters for a lobby sign. Thanks in advance!

We use a Shop Bot CNC machine

 

[Christian @ 2CT Media]

we love our onsrud 63-430 and 420 bits

 

[rossmosh]

2 Flute or O flute bit is what you want. I'd go with a 1/8" or 3/16" bit typically.

Bigger issue will be the hold down. .04" aluminum cuts fine in 1 pass with a decent machine. Holding letters down, especially smaller ones, can be tricky. If you don't have a really good vac setup, you're going to want to glue the material down to a spoilboard.