What mill bits?

[icedfusion]

@Jonathan - Which 6mm bits are you referring to? An item on the page in the link I posted or to the two ebay item links? I didn't think either of the ebay links were 6mm?? One is 0.125" (3.18mm) and the other 0.157"(3.9878mm)

I would also assume that I would need a 6mm collet to use 6mm bits with a Kress?

Cheers

ice.

[Jonathan]

@Jonathan - Which 6mm bits are you referring to?

These:
http://www.ebay.co.uk/itm/5x-6mm-Car...ht_2687wt_1037

I use them a lot... I've done anything up to 25mm thick with them.

I would also assume that I would need a 6mm collet to use 6mm bits with a Kress?

Yep, the bits don't squash that much :lol:

If you're cutting all the way through this 10mm aluminium then get the 6mm cutter as it's a huge amount more rigid than 1/8" and there's more space for the swarf to clear. That means you can cut faster (higher depth of cut and feedrate), and I guess the cutter will last longer too. I use mine on the router at 1.2mm depth of cut and 600mm/min @ 11000rpm, just putting coolant on with a pipette (so much easier than a brush) every so often. If you're using a rigid milling machine they will cut through 10mm in one pass, but on a router you need to use less as framework and spindle are not as strong.
A 1/8" wide slot 10mm deep is needlessly annoying if you can fit the 6mm cutter in.