Quote Originally Posted by ngwagwa View Post
The cutter is a 2mm extended neck ball nose and the 4mm shank is flush with the collet. I have to use a 20mm long tool as the next size down (10mm) is too short. As for the feed rate I run them at the recommended 210mm/min but in this case as the slot is only 2.059 wide I prefer to reduce the feed
OK I understand with the shank but if all it's doing is the finish pass like what your showing then you could easily go well past the recommended feed rate as the WOC/DOC is so tiny. There is hardly any tool pressure on it so it's not likely to break.!
Regards the Slot then I'd Cam that up as a separate feature because what's the point of slowing the whole job just for that one area where you need to be careful.?

Recommendations are ok but you have to assess to each job and I can see that your slowing the job down and probably getting a worse finish because of it due to running too slow. Will be worth you experimenting with Feeds and slightly different strategies for areas like slots etc.