Its a 2 flute solid carbine 3mm bit from Cutwell. Done very slowly indeed at 65mm/min and 0.5mm cut depth. I think I could have done it at 1mm cut depth for the pocketing, but I didn't want to push it since the cutter already snapped once finding a good speed! I also put some marker points where I need to drill holes; much quicker to make holes with the pillar drill.

Still, the machine ran for about 3 hours no problems :)