Swede,
I would make sure that the endmill is being chucked quite short, in order to improve the stiffness of it. If you use an ER collet, you can actually chuck with some of the flute up inside the collet. This might improve the odds against premature breakage.
Use a light air blast. You don't want the tool stirring in a slurry of chips and a puddle of coolant.
The step-plunge motion maybe would be better replaced by ramping to depth. Does the part seem stiff enough when clamped for machining, or is there flex to it?
__________________
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |