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- Insert fits in our FBD-875 to FBD-1031 flat bottom drills
- Insert size is 7.9mm square X 3.97mm thick X .6mm Corner Radius
- MariTool Brand
- This insert has 4 cutting edges
Speed and Feeds
Material sfpm Feed per revolution
Mild Steels 600-800 .003-.006
Medium Carbon Steels 400-500 .003-.005
High Alloy Steels 200-300 .0025-.004
Tool Steels 200-250 .0025-.004
Stainless Steels 300-400 .003-.004
Non Ferrous Metals 700-1000 .005-.009
Proper coolant pressure thru drill is critical
If long chips arise, introduce a pecking cycle
Same feedrate or 1.5X can be used when boring (much less when drill body is 4D or longer)
