Speed and Feed Calculator
Cutter
Diameter
Enter Cutter Diameter and Surface Speed to Calculate the R.P.M.

For deep slots reduce the Ft./Min. by 20 to 40%
Surface Speed
Ft./Min.
R.P.M.


No. of
Teeth
Enter the No. of Teeth and the Chip Load per Tooth to Determine the Feed Rate (In./Min.)

Use .002-.005 as starting chip load per tooth
Chip Load
per Tooth
Feed Rate in
In./Min.


SCROLL UP/DOWN TO SELECT MATERIAL AND SUGGESTED STARTING SURFACE FOOTAGE
REFERENCE: MACHINING DATA HANDBOOK; MACHINABILITY DATA CENTER
Material High Speed Steel Cobalt Tool Steel Uncoated Carbide

Coated Carbide
NON-FERROUS MATERIAL
ALUMINUM ALLOYS 600+ FT./MIN. 1200+ FT./MIN.
MAGNESIUM ALLOYS 600+ FT./MIN.   1000+ FT./MIN.
BRASS 300+ FT./MIN.   800 FT./MIN. 650+ FT./MIN.
BRONZE 80-100 FT/MIN. 250-300 FT./MIN.
TITANIUM (DOUBLE STARTING FEED RATES)
COMMERCIALLY PURE 115-140 FT./MIN. 275-325 FT./MIN.
ALPHA & ALPHA-BETA ALLOYS 30-50 FT./MIN. 200-225 FT./MIN.
FERROUS MATERIAL
STEELS
FREE MACHINING CARBON STEEL 130-180 FT./MIN. 450-500 FT./MIN. 750-900 FT./MIN.
LOW CARBON STEEL 120-170 FT./MIN. 400-450 FT./MIN. 600-650 FT./MIN.
MEDIUM CARBON STEEL 100-120 FT./MIN. 375-425 FT./MIN. 550-600 FT./MIN.
ALLOY STEEL 100-120 FT./MIN. 375-425 FT./MIN. 550-600 FT./MIN.
ALLOY AND MED. CARBON HEAT TREATED
(Rc 26-32)		 75-100 FT./MIN. 250-300 FT./MIN. 450-500 FT./MIN.
ALLOY AND MED. CARBON HEAT TREATED
(Rc 36-40)		 50-60 FT./MIN. 180-200 FT./MIN. 225-275 FT./MIN.
ALLOY AND MED. CARBON HEAT TREATED
(Rc 40-48)		 40-50 FT./MIN. 150-180 FT./MIN. 220-250 FT./MIN.
ALLOY AND MED. CARBON HEAT TREATED
(Rc 48+)		 20-30 FT./MIN. 100-120 FT./MIN.
TOOL STEEL (WROUGHT) 40-60 FT./MIN. 180-200 FT./MIN. 350 FT./MIN.
STAINLESS STEELS
FREE MACHINING 80-110 FT./MIN. 100-140 FT./MIN. 140+ FT./MIN.
STAINLESS (300 SERIES) 50-70 FT./MIN. 80-100 FT./MIN. 100+ FT./MIN.
17-4PH ANNEALLED 50-80 FT./MIN. 150-190 FT./MIN. 190+ FT./MIN.
17-4PH 200,000 PSI 30-50 FT./MIN. 100-140 FT./MIN. 140+ FT./MIN.
HIGH TEMP. ALLOYS
HASTELOY X, INCONEL 15-20 FT./MIN. 45-55 FT./MIN.  
INCONEL X 20-25 FT./MIN.  
MONEL NICKEL ALLOY 20-25 FT./MIN.
CAST IRON
MALLEABLE IRON 100-140 FT./MIN. 400-450 FT./MIN. 540-700 FT./MIN.
GRAY CAST IRON 65-110 FT./MIN. 220-300 FT./MIN. 340-450 FT./MIN.
DUCTILE IRON 80-125 FT./MIN.   300-350 FT./MIN. 460-550 FT./MIN.

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