Thanks Chris,

I bought some nice new 6 and 8mm 2 flute Hi-Helix 45° cutters.
On the same material as before I managed to pocket a 52mm dia hole 16mm deep.
Feed was 400mm per minute at 1mm deep. I never been that brave before.
Hood suggested that my machine looks as though it should cope with 2mm depth per pass so I may try that next.

I still think that 2100rpm on the spindle is a bit slow so I might consider making a new pulley to up the speed to around 4,000.

Regards

George

Just watch you don't go over the speed rating of your spindle bearings! Most have ratings for oil, grease and oil bath. I'd check what you have then check on a bearing site like NSK or similar.

Not being insulting, cause i have done if before, and the resulting mess kinda looked like that.

Is the spindle turning the correct direction?

did this multiple times yesterday, spend half the day scratching my head before i realised, :s