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END MILLS. D. A. C. B. E. F. G. Purpose: Used to face, cut outside and inside contours, cut slots and cut pockets in hard and soft materials. Types: Flat end mill bit A. 4 Flutes with hole B. Left-hand C. Roughing D. 4 Flutes w/out hole (center cutting)
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END MILLS D A C B E F G Purpose: • Used to face, cut outside and inside contours, cut slots and cut pockets in hard and soft materials. Types: Flat end mill bit A. 4 Flutes with hole B. Left-hand C. Roughing D. 4 Flutes w/out hole (center cutting) E. 2 Flutes w/out hole (center cutting) Ball end mill bit F. 4 Flutes G. 2 Flutes Example Mill Slot Cut Rules of Thumb to follow:-Mill bits with a hole can not be used to plunge-4 flute mill bits are used for harder materials ie. Steel-2 flute mill bits are used for softer materials ie. Aluminum -Ball end mill are used when a 3D contour is desired-Mill bits are precision tools with exception of roughing mill bits
END MILL SIZES A C E F D G B