View Full Version : Where to buy long ball nose mill for foam cutting?
04-05-2012, 01:10 PM
I'm after a reasonably priced ball nose mill suitable for cutting foam with a cutting length of at least 175mm in the UK
The only ones I have found are the tools from Frog from the US
Anyone know any good sources in the UK?
04-05-2012, 02:28 PM
Those cutters are close, but still about half the length I need, have enquired on the custom option...
I have searched for that thread, but can't seem to see it, can anyone point me to it?
04-05-2012, 05:08 PM
I remember seeing some on eBay some time ago...
What diameter do you need? Perhaps extending an existing cutter is an option. When I needed a long 1/2" ballnose cutter for MDF I just used a cheap router cutter with a 1/4" shank and made an extension with it using 12mm steel bar. Then hardened it for good measure. I chose 12mm steel bar as being a slightly lower diameter than the cutter the extension cannot interfere with what you're cutting.
05-05-2012, 04:32 PM
I use long 6mm or 8mm twist drills reground (by eye/hand) to a round end. Works for me.
09-05-2012, 11:53 PM
High Density Foam? Best result I had was with a Burr bit :s or maybe I just got the whole spindle speed/feed rate wrong :)
10-05-2012, 02:03 PM
Aha, spindle speed? I don't know - I use a cheap 240volt router run at 100volts. It lasts for ever in that mode. A slow(ish) speed sometimes helps prevent the foam sticking to the bit with heat if you are cutting deep. That varies with the foam density and composition, of course.
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