What's this Carbide coating.

[Boyan Silyavski]

I remember somebody using plan drill bits for the purpose. A good bit like Dormer is quite balanced. Leave, flatten or ball nose the face. But a proper reamer I belive is what will do the job.
As you can see bellow more or less the special foam cutters look similar.
http://www.3dcutting.com/solutions/frogtools.html

so why not just buy proper foam cutter or try some of what I suggest for a diy solution

Look at this baby
http://www.ballewsawandtool.com/inde...hk=1&Itemid=31

[charlieuk]

The frog tools are pretty expensive at nearly $300 dollars befor shipping and tax and the other is only a max of 1/2" dia so a little on the small side ideally but maybe a possibility if I can't find anything else

many thanks

[gavztheouch]

How big is your max size collet on the spindle?

[charlieuk]

It's a er20 collet so 13 mm

many thanks

[charlieuk]

http://www.copycarver.com/images/Sab...Burr%20Set.jpgI found this picture so it looks like it is some sort of coating that they put on.

[Boyan Silyavski]

There is no free lunch this size. You want fast, means you are making £££.
Now you wouldn't like cheap not perfectly balanced tool this size on your spindle.

Your best bet is custom tool, should be cheaper than what they want. Later can be re sharpened many times so that's even better money wise.
But as you see the burrs are not the proper tool, even if they work fine.