Speed & Feed Rates

Recommended Cutting Speeds in Feet per Minute

Material
Tool Steels
Hardness, HB* Material
Condition*
Cutting Speed, fpm
Drilling Reaming
HSS HSS Carbide
Water Hardening          
W1, W2, W5 150-209 A 85 35 200

Shock Resisting
S1, S2, S5, S6, S7 175-225 A 50 35 175

Cold Work, Oil Hardening
O1, O2, O6, O7 175-225 A 45 30 150

Cold Work, High Carbon High
Chromium, D2, D3, D4, D5, D7 200-250 A 30 20 80

Cold Work, Air Hardening
A2, A3, A8, A9, A10 210-250 A 50 35 150
A4, A6   A 45 30 125
A7   A 30 20 100

Hot Work, Chromium Type
H10, H11, H12, H13, H14, H19 150-200 A 60 40 200
200-250 A 50 30 150
325-375 Q and T 30 20 100

Hot Work, Tungsten Type
H21, H22, H23, H24, H25, H26 150-200 A 55 35 150
200-250 A 40 25 125

Hot Work, Molybdenum Type
H41, H42, H43 150-200 A 45 30 150
200-250 A 35 20 125

Special Purpose, Low Alloy
L2, L3, L6 150-200 A 60 40 200

Mold
P2, P3, P4, P5, P6 100-150 A 75 50 225
P20, P21 150-200 A 60 40 200

High-Speed Steel
M1, M2, M6, M10, T1, T2, T6 200-250 A 45 30 150
M3-1, M4, M7, M30, M33,
M34, M36, M41, M42,
M43,
M44, M46, M47, T5, T8
225-275 A 35 20 100
T15, M3-2 225-275 A 25 15 80
Material
Stainless Steels
Hardness, HB* Material
Condition*
Cutting Speed, fpm
Drilling Reaming
HSS HSS Carbide
Free Machining Stainless Steel
Ferritic 430F, 430F Se 135-185 A 90 60 250
Austenitic 203EZ, 303, 303 Se, 303 MA, 303 Pb,
303 Cu, 303 Plus X
135-185 A 85 55 225
225-275 CD 70 45 200
Martensitic 416, 416 Se, 416 Plus X, 420F, 420F Se, 440F, 440F Se 135-185 A 90 60 250
185-240 CD 70 45 200
275-325 Q and T 40 25 150
375-425 Q and T 20 10 80

Stainless Steels
 
Ferritic 405, 409, 429, 430, 434, 436, 442, 445, 502 135-185 A 65 45 200
Austenitic 201, 202, 301, 302, 304, 304L, 305, 308, 321, 347, 348 135-185 A 55 35 150
225-275 CD 50 30 125
Austenitic 302B, 309, 309S, 310, 310S, 314, 316, 316L, 317, 330 135-185 A 50 30 150
Martensitic 403, 410, 420, 501 135-175 A 75 50 225
175-225 A 65 45 200
275-325 Q and T 40 25 125
375-425 Q and T 25 15 80
Martensitic 414, 431
Greek Ascoloy
225-275 A 50 30 150
275-325 Q and T 40 25 125
375-425 Q and T 25 15 80
Martesitic, 440A, 440B, 440C 225-275 A 45 30 125
275-325 Q and T 40 25 100
375-425 Q and T 20 10 75
Precipitation Hardening 15-5PH, 17-4PH, 17-7Ph,

17-14Cu Mo, AF-71, AFC-77, AM-350, AM-355,
AM-362,
Custom 455, HNM, PH13-8, PH14-8Mo,
PH15-7Mo, Stainless W
150-200 A 50 30 150
275-325 H 45 25 125
325-375 H 35 20 75
375-425 H 20 10 50
Material
Copper Alloys
(Copper Alloy Nos. as per the Copper Development Assn. Inc.)
Material
Condition*
Cutting Speed, fpm
Drilling Reaming
HSS HSS HSS
314 Leaded Commercial Bronze
332 High Leaded Brass
340 Medium Leaded Brass
342 High Leaded Brass
353 High Leaded Brass
356 Extra High Leaded Brass
360 Free Cutting Brass
370 Free Cutting Muntz Metal
377 Forging Brass
385 Architectural Bronze
485 Leaded Naval Brass
544 Free Cutting Phosphor Bronze
A 160 160 320
CD 175 175 360
226 Jewelry Bronze
230 Red Brass
240 Low Brass
260 Cartridge Brass 70%
268 Yellow Brass
280 Muntz Metal
335 Low Leaded Brass
365 Leaded Muntz Metal
368 Leaded Muntz Metal
443 Admiralty Brass (inhibited)
445 Admiralty Brass (inhibited)
651 Low Silicon Bronze
655 High Silicon Bronze
675 Manganese Bronze
687 Aluminum Brass
770 Nickel Silver
796 Leaded Nickel Silver
A 120 110 250
CD 140 120 275
102 Oxygen Free Copper
110 Electrolytic Tough Pitch Copper
122 Phosphorus Deoxidized Copper
170 Beryllium Copper
172 Beryllium Copper
175 Beryllium Copper
210 Guilding 95%
220 Commercial Bronze
502 Phosphor Bronze 1.25%
510 Phosphor Bronze 5%
521 Phosphor Bronze 8%
524 Phosphor Bronze 10%
614 Aluminum Bronze
706 Copper Nickel 10%
715 Copper Nickel 30%
745 Nickel Silver
752 Nickel Silver
754 Nickel Silver
757 Nickel Silver
A 60 50 180
CD 65 60 200
TCT-Reamer-Chart

Recommended material for

Hole Diameter Material Left (Diameter)
.090-.170 .005-.010
.171-.280 .008-.012
.281-.880 .010-.016
.881-2.50 .015-.030
0500-Drill

Feeds for Drilling

Feeds Diameter
.001-.003 IPR .1250 or less
.002-.006 IPR .1250-.250
.004-.010 IPR .250-.500
.007-.015 IPR .500-1.00
.010-.025 IPR 1.00 and up

Metric-to-Standard Conversion Formula (millimeters to inches)
mm 4 25.4 = inches
Example:
12.70 mm 4 25.4 = .500 inches

Calculating Revolutions Per Minute (RPM) from Surface Footage (SFPM) Diameter
12 x SFPM = RPM
p x diameter

Speeds and Feeds
.002 – .003 per flute per revolution
.0025 x number of flutes
= inches per revolution

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Freeport, IL 61032
Phone: 815-232-2300
Toll-free: 800-851-2874
Fax: 815-233-9729
sales@protocutter.com

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