This solid carbide slotting endmill is used to cut slots for use with the 1/8" SmartVac 3 vacuum gasket. This special endmill also cuts a chamfer at the top of the groove. The smaller slot width puts just enough compression on the gasket to hold it snugly in place. Dimensions: Groove depth should be cut to .100" deep. Shank diameter is .1875". Chamfer is 45 deg. Slot width is .118". 3 Flutes, High Helix Feeds and Speeds: 250 SFM (8100 RPM recommended) .001" IPT (24 IPM recommended) Full Depth of cut MAXIMUM coolant/air possible for chip evacuation Also compatible with the SmartVac II System.