But there are steps users can take to end vibration with both milling cutters and endmills. Milling cutter chatter Use cutters with fewer inserts. Although it may seem counter-intuitive, the first step to reducing chatter in milling operations is to switch to a cutter with fewer teeth. In general, the coarser the cutter pitch, the lesser the chance of harmonic vibration. The larger the cutter, the better.
Conditions permitting, larger cutters provide more choices about how to approach the workpiece.
Varying relative position often helps damp vibration. Manufacturing engineers should try to keep the cutter diameter 20 to 50 percent larger than the width of the cut. The cutter should be sized so that no more than two-thirds of the inserts are engaged in the cut at any time. These guidelines help produce an ideal entry angle, thereby reducing cutting forces and vibration. Optimize insert geometry.