Im using a 3/8 2-Flute Carbide Endmill. Plunging with full cutter width at 80mm/min, then feeding at 350mm/min down the X axis.

The plunge works great, no chatter. Most of the run down X is find too. Its the transition from the plunge to the X-feed. It hums BAD right at that moment. All the chips on the workbench hop. Im afraid that will damage my mill. Comments?

How could I avoid all the chatter I am getting between the plunge and x-feed?

Thanks,
Swami