RPM=SFPM*3.82/REAMER DIAMETER
Speeds & feeds are starting recommendations only. Factors such as machine, xture and tooling
rigidity, horsepower available, coolant application and others will aect the performance signicantly.
Please read machine operators instructions and use all safety shields and glasses before performing
these operations. Use these charts for carbide tipped reamers.
CLASS OF
MATERIALS
MATERIAL BRINELL
SPEED IN SFPM
HOLE DIAMETER YOU ARE DRILLING IN INCHES
FEED RATE (INCHES PER REVOLUTION)
GENERAL PURPOSE
⁄ ¼ ⁄ ½ ⁄ ¾ 1 1¼ 1½
NON-FERROUS (SOFT)
ALUMINUM ALLOY - WROUGHT
30-150
(500kg)
150-250 .004 .006 .008 .011 .012 .013 .016 .019 .020
MAGNESIUM ALLOY 50-90 130-190 .005 .010 .012 .015 .016 .017 .020 .022 .025
LEAD ALLOY 10-20 150-250 .002 .006 .008 .012 .014 .015 .018 .021 .022
NON-METAL AND PLASTIC – 90-250 .004 .005 .007 .008 .009 .012 .014 .016 .018
ZINC ALLOY - DIE CAST 80-100 140-210 .005 .007 .008 .010 .011 .012 .015 .018 .020
NON-FERROUS
(HARD)
ALUMINUM BRONZE 40-175 50-90 .004 .006 .010 .012 .014 .016 .018 .020 .022
BRASS ALLOY - LEADED AND
FREE CUTTING
10-100Rb 100-250 .005 .008 .011 .015 .017 .018 .020 .022 .025
NICKEL SILVER 10-100Rb 50-90 .004 .006 .008 .010 .011 .012 .014 .015 .016
COPPER ALLOY - TOUGH 40-200 50-90 .005 .006 .008 .010 .011 .012 .014 .016 .017
CAST IRON
DUCTILE CAST IRON - AUSTENITIC 120-275 45-70 .004 .006 .007 .008 .010 .013 .015 .018 .020
DUCTILE CAST IRON - FERRITIC 140-270 50-90 .004 .005 .008 .010 .012 .014 .017 .020 .023
DUCTILE CAST IRON - MARTENSITIC 270-400 35-60 .004 .006 .007 .008 .009 .010 .012 .014 .016
GRAY - PEARLITIC 220-320 45-70 .004 .006 .008 .009 .010 .012 .014 .018 .020
GRAY - FERRITIC 120-220 65-135 .005 .008 .010 .011 .013 .016 .020 .022 .025
MALLEABLE CAST IRON -
MARTENSITIC
200-320 45-70 .004 .006 .008 .010 .012 .013 .015 .018 .025
LOW CARBON
STEELSt
LOW AND MEDIUM CARBON STEEL -
FREE MACHINING
100-250 70-100 .005 .008 .010 .012 .014 .015 .020 .025 .030
LOW AND MEDIUM CARBON STEEL -
WROUGHT
100-375 30-85 .004 .008 .009 .011 .013 .015 .018 .020 .022
MEDIUM
STRENGTH
STEELS
LOW AND MEDIUM CARBON
ALLOY STEEL - FREE MACHINING
100-275 65-100 .005 .008 .010 .015 .017 .018 .022 .025 .027
LOW AND MEDIUM CARBON
ALLOY STEEL
85-375 40-85 .005 .010 .012 .015 .018 .020 .025 .027 .030
STAINLESS STEEL - 400 SERIES 135-325 40-90 .003 .005 .006 .007 .008 .008 .010 .011 .012
STAINLESS STEEL - 400 SERIES
FREE MACHINING
135-275 65-100 .004 .006 .007 .008 .009 .009 .010 .011 .012
HIGH STRENGTH
STEELS
HIGH STRENGTH STEEL -
WROUGHT & TOOL STEEL
175-400 35-70 .004 .006 .007 .008 .009 .010 .011 .012 .013
HIGH TEMP.
ALLOYS
HIGH TEMP ALLOYS
NICKEL & IRON BASE ALLOY
140-300 15-85 .003 .005 .005 .005 .006 .007 .008 .010 .012
STAINLESS STEEL - 300 SERIES 135-375 40-75 .003 .004 .005 .006 .006 .007 .008 .009 .010
STAINLESS STEEL - PH SERIES 150-440 35-70 .003 .004 .004 .005 .006 .007 .008 .009 .010
TITANIUM ALLOY 110-380 30-45 .004 .006 .008 .010 .011 .011 .012 .013 .014
CLASS OF
MATERIALS
MATERIAL BRINELL
SPEED IN SFPM
HOLE DIAMETER YOU ARE DRILLING IN INCHES
FEED RATE (INCHES PER REVOLUTION)
COOLANT FED
⁄ ¼ ⁄ ½ ⁄ ¾ 1 1¼ 1½
NON-FERROUS (SOFT)
ALUMINUM ALLOY - WROUGHT
30-150
(500kg)
200-300 – .008 .010 .013 .015 .017 .021 .022 .024
MAGNESIUM ALLOY 50-90 150-250 – .012 .015 .018 .019 .020 .024 .026 .028
LEAD ALLOY 10-20 200-300 – .008 .010 .016 .017 .018 .022 .024 .026
NON-METAL AND PLASTIC – 125-300 – .006 .008 .009 .010 .014 .016 .018 .020
ZINC ALLOY - DIE CAST 80-100 170-240 – .009 .011 .013 .014 .016 .020 .022 .025
NON-FERROUS
(HARD)
ALUMINUM BRONZE 40-175 70-105 – .008 .013 .015 .016 .018 .021 .024 .028
BRASS ALLOY - LEADED AND
FREE CUTTING
10-100Rb 125-300 – .010 .014 .020 .022 .024 .026 .028 .032
NICKEL SILVER 10-100Rb 70-190 – .007 .010 .012 .013 .014 .017 .018 .018
COPPER ALLOY - TOUGH 40-200 70-105 – .008 .010 .013 .014 .016 .018 .019 .020
CAST IRON
DUCTILE CAST IRON - AUSTENITIC 120-275 65-100 – .008 .009 .011 .014 .016 .018 .020 .025
DUCTILE CAST IRON - FERRITIC 140-270 70-105 – .007 .010 .012 .015 .017 .022 .024 .027
DUCTILE CAST IRON - MARTENSITIC 270-400 50-85 – .008 .009 .010 .011 .013 .014 .017 .019
GRAY - PEARLITIC 220-320 55-100 – .008 .010 .012 .014 .015 .018 .020 .026
GRAY - FERRITIC 120-220 95-190 – .010 .013 .014 .017 .020 .024 .028 .030
MALLEABLE CAST IRON -
MARTENSITIC
200-320 65-100 – .008 .010 .012 .014 .015 .020 .023 .030
LOW CARBON
STEELS
LOW AND MEDIUM CARBON STEEL -
FREE MACHINING
100-250 100-150 – .012 .014 .016 .018 .020 .025 .030 .035
LOW AND MEDIUM CARBON STEEL -
WROUGHT
100-375 40-110 – .009 .011 .013 .015 .017 .022 .024 .026
MEDIUM
STRENGTH
STEELS
LOW AND MEDIUM CARBON
ALLOY STEEL - FREE MACHINING
100-275 90-135 – .010 .012 .018 .020 .022 .025 .027 .030
LOW AND MEDIUM CARBON
ALLOY STEEL
85-375 65-100 – .012 .015 .018 .022 .024 .028 .030 .033
STAINLESS STEEL - 400 SERIES 135-325 50-100 – .007 .007 .008 .009 .009 .012 .014 .015
STAINLESS STEEL - 400 SERIES
FREE MACHINING
135-275 90-135 – .008 .009 .010 .011 .012 .013 .013 .014
HIGH STRENGTH
STEELS
HIGH STRENGTH STEEL -
WROUGHT & TOOL STEEL
175-400 50-100 – .007 .008 .009 .011 .012 .014 .015 .016
HIGH TEMP.
ALLOYS
HIGH TEMP ALLOYS
NICKEL & IRON BASE ALLOY
140-300 20-115 – .006 .007 .007 .008 .008 .010 .012 .015
STAINLESS STEEL - 300 SERIES 135-375 60-90 – .006 .007 .008 .008 .009 .010 .011 .012
STAINLESS STEEL - PH SERIES 150-440 50-90 – .006 .006 .007 .008 .009 .010 .012 .014
TITANIUM ALLOY 110-380 40-60 – .008 .010 .013 .014 .014 .016 .016 .018
RPM = Rotations Per Minute
SFPM = Surface Feet Per Minute
Reamer Diameter = Diameter of the
reamer in inches
MADE IN USA
ROCK RIVER TOOL, INC.
www.rockrivertool.com
PHONE (800) 345-8924 FAX (800) 867-9312
REAMING SPEEDS & FEEDS
Carbide Tipped
COOLANT FED REAMING
GENERAL PURPOSE REAMING