Whitney Tool Company

Speed and Feed Calculator

Speed
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.

Feed
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.