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360 Brass

PostPosted: Mon Jun 05, 2017 2:40 pm
by weirdbeard
Hi All, Hopefully someone can help me out or point me in the right direction

I have a piece of 360 machine brass. Its 25.3mm thick and I want to cut it in half with a 3mm carbide 2 flute end mill. Then I'm hopefully going to start making some badges for my woodwork

So i have worked out from the CNC Cook Book linked below that I need to a spindle speed of 6366RPM and a feed rate of 25IPM (please let me know if this sounds off :? )

What I haven't been able to find is what should the pass depth, step over and plunge rate be set to? (I wont actually be using step over in this example but would still like to set the tool up fully)

From what I've read elsewhere i shouldn't need water cooling on the brass but please yell at me if this is nuts

Any advice would be much appreciated :D

http://www.cnccookbook.com/Calculators/ ... lator.html

Re: 360 Brass

PostPosted: Mon Jun 05, 2017 3:43 pm
by highpockets
I just cut my first piece of brass about a week or so ago, can't say if it was 360 brass, but here are the settings I used.

1/16" 2 fluted end mill, 8500 rpm, 40 ipm, 15 ipm plunge rate. .04 depth of cut per pass. No coolant, just kept the chips brushed out of the way.

I'm sure these numbers are conservative, but I got good chips and didn't break anything.

Re: 360 Brass

PostPosted: Mon Jun 05, 2017 5:21 pm
by Leo
Do you have a band saw with a metal cutting blade.

You don't mention any other dimensions other than thickness. Do you want to cut the 25.3 mm thickness?

Brass doesn't really need coolant. We cut tons of brass in an industrial setting and mostly cut it dry.

High pockets settings sounds good to me

360 is a nice machinable brass alloy

Re: 360 Brass

PostPosted: Tue Jun 06, 2017 12:46 am
by weirdbeard
Thanks guys, yeah i have a bandsaw but dont have a bi metal blade. I did think about buying one but would prefer to do it in the cnc so its more accurate.
I basically want to resaw a lenght of brass.
Thanks for those settings highpockets ill give them a go ;)