REAMING SPEEDS & FEEDS
Carbide Tipped
RPM = Rotations Per Minute
SFPM = Surface Feet Per Minute
Reamer Diameter = Diameter of the
Speeds & feeds are starting recommendations only. Factors such as machine, fixture and tooling
rigidity, horsepower available, coolant application and others will affect the performance significantly. reamer in inches
Please read machine operators instructions and use all safety shields and glasses before performing
RPM=SFPM*3.82/REAMER DIAMETER
these operations. Use these charts for carbide tipped reamers.
GENERAL PURPOSE REAMING
CLASS OF
MATERIALS
MATERIAL
ALUMINUM ALLOY - WROUGHT
NON-FERROUS (SOFT)
NON-FERROUS
(HARD)
CAST IRON
LOW CARBON
STEELSt
MEDIUM
STRENGTH
STEELS
HIGH STRENGTH
STEELS
HIGH TEMP.
ALLOYS
MAGNESIUM ALLOY
LEAD ALLOY
NON-METAL AND PLASTIC
ZINC ALLOY - DIE CAST
ALUMINUM BRONZE
BRASS ALLOY - LEADED AND
FREE CUTTING
NICKEL SILVER
COPPER ALLOY - TOUGH
DUCTILE CAST IRON - AUSTENITIC
DUCTILE CAST IRON - FERRITIC
DUCTILE CAST IRON - MARTENSITIC
GRAY - PEARLITIC
GRAY - FERRITIC
MALLEABLE CAST IRON MARTENSITIC
LOW AND MEDIUM CARBON STEEL FREE MACHINING
LOW AND MEDIUM CARBON STEEL WROUGHT
LOW AND MEDIUM CARBON
ALLOY STEEL - FREE MACHINING
LOW AND MEDIUM CARBON
ALLOY STEEL
STAINLESS STEEL - 400 SERIES
STAINLESS STEEL - 400 SERIES
FREE MACHINING
HIGH STRENGTH STEEL WROUGHT & TOOL STEEL
HIGH TEMP ALLOYS
NICKEL & IRON BASE ALLOY
STAINLESS STEEL - 300 SERIES
STAINLESS STEEL - PH SERIES
TITANIUM ALLOY
COOLANT FED REAMING
CLASS OF
MATERIALS
MATERIAL
ALUMINUM ALLOY - WROUGHT
NON-FERROUS (SOFT)
NON-FERROUS
(HARD)
CAST IRON
LOW CARBON
STEELS
MEDIUM
STRENGTH
STEELS
HIGH STRENGTH
STEELS
HIGH TEMP.
ALLOYS
MAGNESIUM ALLOY
LEAD ALLOY
NON-METAL AND PLASTIC
ZINC ALLOY - DIE CAST
ALUMINUM BRONZE
BRASS ALLOY - LEADED AND
FREE CUTTING
NICKEL SILVER
COPPER ALLOY - TOUGH
DUCTILE CAST IRON - AUSTENITIC
DUCTILE CAST IRON - FERRITIC
DUCTILE CAST IRON - MARTENSITIC
GRAY - PEARLITIC
GRAY - FERRITIC
MALLEABLE CAST IRON MARTENSITIC
LOW AND MEDIUM CARBON STEEL FREE MACHINING
LOW AND MEDIUM CARBON STEEL WROUGHT
LOW AND MEDIUM CARBON
ALLOY STEEL - FREE MACHINING
LOW AND MEDIUM CARBON
ALLOY STEEL
STAINLESS STEEL - 400 SERIES
STAINLESS STEEL - 400 SERIES
FREE MACHINING
HIGH STRENGTH STEEL WROUGHT & TOOL STEEL
HIGH TEMP ALLOYS
NICKEL & IRON BASE ALLOY
STAINLESS STEEL - 300 SERIES
STAINLESS STEEL - PH SERIES
TITANIUM ALLOY
BRINELL
SPEED IN SFPM
HOLE DIAMETER YOU ARE DRILLING IN INCHES
FEED RATE (INCHES PER REVOLUTION)
3/8
1/2
5/8
3/4
1
GENERAL PURPOSE
1/8
1/4
11/4
11/2
150-250
.004
.006
.008
.011
.012
.013
.016
.019
.020
130-190
150-250
90-250
140-210
50-90
.005
.002
.004
.005
.004
.010
.006
.005
.007
.006
.012
.008
.007
.008
.010
.015
.012
.008
.010
.012
.016
.014
.009
.011
.014
.017
.015
.012
.012
.016
.020
.018
.014
.015
.018
.022
.021
.016
.018
.020
.025
.022
.018
.020
.022
10-100Rb
100-250
.005
.008
.011
.015
.017
.018
.020
.022
.025
10-100Rb
40-200
120-275
140-270
270-400
220-320
120-220
50-90
50-90
45-70
50-90
35-60
45-70
65-135
.004
.005
.004
.004
.004
.004
.005
.006
.006
.006
.005
.006
.006
.008
.008
.008
.007
.008
.007
.008
.010
.010
.010
.008
.010
.008
.009
.011
.011
.011
.010
.012
.009
.010
.013
.012
.012
.013
.014
.010
.012
.016
.014
.014
.015
.017
.012
.014
.020
.015
.016
.018
.020
.014
.018
.022
.016
.017
.020
.023
.016
.020
.025
200-320
45-70
.004
.006
.008
.010
.012
.013
.015
.018
.025
100-250
70-100
.005
.008
.010
.012
.014
.015
.020
.025
.030
100-375
30-85
.004
.008
.009
.011
.013
.015
.018
.020
.022
100-275
65-100
.005
.008
.010
.015
.017
.018
.022
.025
.027
30-150
(500kg)
50-90
10-20
–
80-100
40-175
85-375
40-85
.005
.010
.012
.015
.018
.020
.025
.027
.030
135-325
40-90
.003
.005
.006
.007
.008
.008
.010
.011
.012
135-275
65-100
.004
.006
.007
.008
.009
.009
.010
.011
.012
175-400
35-70
.004
.006
.007
.008
.009
.010
.011
.012
.013
140-300
15-85
.003
.005
.005
.005
.006
.007
.008
.010
.012
135-375
150-440
110-380
40-75
35-70
30-45
.003
.003
.004
.004
.004
.006
.005
.004
.008
.006
.005
.010
.006
.006
.011
.007
.007
.011
.008
.008
.012
.009
.009
.013
.010
.010
.014
BRINELL
SPEED IN SFPM
HOLE DIAMETER YOU ARE DRILLING IN INCHES
FEED RATE (INCHES PER REVOLUTION)
3/8
1/2
5/8
3/4
1
COOLANT FED
1/8
1/4
11/4
11/2
200-300
–
.008
.010
.013
.015
.017
.021
.022
.024
150-250
200-300
125-300
170-240
70-105
–
–
–
–
–
.012
.008
.006
.009
.008
.015
.010
.008
.011
.013
.018
.016
.009
.013
.015
.019
.017
.010
.014
.016
.020
.018
.014
.016
.018
.024
.022
.016
.020
.021
.026
.024
.018
.022
.024
.028
.026
.020
.025
.028
10-100Rb
125-300
–
.010
.014
.020
.022
.024
.026
.028
.032
10-100Rb
40-200
120-275
140-270
270-400
220-320
120-220
70-190
70-105
65-100
70-105
50-85
55-100
95-190
–
–
–
–
–
–
–
.007
.008
.008
.007
.008
.008
.010
.010
.010
.009
.010
.009
.010
.013
.012
.013
.011
.012
.010
.012
.014
.013
.014
.014
.015
.011
.014
.017
.014
.016
.016
.017
.013
.015
.020
.017
.018
.018
.022
.014
.018
.024
.018
.019
.020
.024
.017
.020
.028
.018
.020
.025
.027
.019
.026
.030
200-320
65-100
–
.008
.010
.012
.014
.015
.020
.023
.030
100-250
100-150
–
.012
.014
.016
.018
.020
.025
.030
.035
100-375
40-110
–
.009
.011
.013
.015
.017
.022
.024
.026
100-275
90-135
–
.010
.012
.018
.020
.022
.025
.027
.030
30-150
(500kg)
50-90
10-20
–
80-100
40-175
85-375
65-100
–
.012
.015
.018
.022
.024
.028
.030
.033
135-325
50-100
–
.007
.007
.008
.009
.009
.012
.014
.015
135-275
90-135
–
.008
.009
.010
.011
.012
.013
.013
.014
175-400
50-100
–
.007
.008
.009
.011
.012
.014
.015
.016
140-300
20-115
–
.006
.007
.007
.008
.008
.010
.012
.015
135-375
150-440
110-380
60-90
50-90
40-60
–
–
–
.006
.006
.008
.007
.006
.010
.008
.007
.013
.008
.008
.014
.009
.009
.014
.010
.010
.016
.011
.012
.016
.012
.014
.018