How-To: Feed Rate Calculation

[Lee Roberts]

Mr Lee: I am cutting composit door but every 2 or 3 door machine start chipping from top and bottom and some how tool broken advise me what type of bit do I use to get extremely fine cutting and bit last for a month at least as well

Hi,

I would try a compression bit/cutter, their flute's have upcut and downcut spirals all on one cutter, so down shear cutting on the top of your material and an up shear cut on the bottom of the material.

You can also get spiral up only and spiral down only, the choice of cutters is great now days, so always select the best cutter for the job/operation.

Of course you need to be using the right speeds and feeds or it won't matter what cutter you use.