220 Series

Tool 220i250C

The 220i250C is a 1/4" 2-flute ball nose from the 220 Series, for contoured surfaces and 3D toolpaths in aluminum. Length of cut is 0.500" (2x diameter), the stiffest option in the 220 Series at this size.

On contoured surfaces and radius features, the ball leaves a small scallop you size with your stepover, where a flat end mill leaves steps.
Two flutes give you the chip clearance aluminum finishing needs on contour passes, where depth and direction keep changing.
The ball radius is 0.125", and Sonic grinds its profile to a lineform accuracy of 0.0002".
The end is center cutting, and Sonic shapes the center to reduce marking on the part.
TiB2 resists aluminum sticking to the edge, so you can run higher speeds and feeds than with an uncoated tool.