speed settings for cutting masonite

[plastics]

its about 3/8 thick I am routering out letters all the way through. any suggestions or info would be great

[jerry_stanek]

How big are the letters what size bit

[plastics]

1/4 in bit

letters are 24" x 24"

[paul_z]

I'd suggest a down spiral or compression bit. Be sure to have good dust collection or wear a respirator (or both)!

Paul Z

[plastics]

any suggestions on how to hold down the part? Is it possible to cut it out with one pass? speed suggestions would also help

[jerry_stanek]

I would use a .25 or larger down cut bit 1 pass. I have a vac table so I just use it. If not put some tabs on it. I cut it about 3 IPS

[signtist]

I leave my speed at about 1200 rpm's. Feed about 2.5 ips.
As far as holddowns, I just put my hand on it the last few seconds so it won't rattle around. john
www.signgraphics1.com (http://www.signgraphics1.com)

[bleeth]

I think John means 12,000

[wberminio]

I use Widgetworks Pressure foot for similar cuts.

[knight_toolworks]

Withthis stuff and a downcut a vac would be enough. it is pretty soft to cut so it does not vibrate really. to get the cleanest cut a 2f straight bit works best on masonite. I think I used a fairly high rpm to get a clean cut but I can't remember for sure.

[feinddj]

I would run in one pass with a compression bit. I would use a vac hold down tabs if not. One thing that I do that helps keep that last bit from getting a divot is to ramp the cut.

D

[knight_toolworks]

Masonite is more like cardboard then anything else it cuts fuzzy. No need for a compression bit. I have cut it with a up with a down and a straight bit and the straight gives a clean cut. well that was for tempered Masonite. the regular stuff is even worse.