MILLING CUTTER, REAMER AND TAP FLUTES

THE following tables give the number of teeth or flutes suitable for milling in various types of cutters, reamers, taps, etc., and also show the forms of fluting cutters used.

SHELL END MILLS; STRAIGHT OR SPIRAL INSERTED TOOTH CUTTERS, P. & W. FORM

TEETH

Plain cutters of 3-inch face and over are generally made with spiral teeth. The 12-degree angle on side of fluting cutter gives ample clearance for cutting spiral grooves with the 12-degree face set on the center line of the work.

For milling teeth on periphery of straddle mills use angular cutter with 60 degree angle at A; for milling teeth on sides of cutters use 70°, 75° or 80° cutter according to number of teeth in cutter to be milled.