Archive for June, 2012

Your Source for Automatic Drills, Multiple Spindle Heads, and more

Drilling Speed Chart

DrillingSpeedChart.pdf

Drilling Speed Chart
WIRE DRILLS CORE DRILLS AND SIMILAR BY OUTSIDE DIAMETER
.75 – 2.5 mm 1/8 to 1/2 inch 5/8 to 1-1/2 inch 1-3/4 to 2-3/4 inch 3 to 4 inch
30,000 TO 18,000 rpm 2,400 -1,000 rpm 1,250 – 1,000 rpm 1,100 – 850 rpm 850 – 200 rpm

Cutting Speeds Table #1 Chart

CuttingSpeedsTableNo1Chart.pdf

Suggested Cutting Speeds with High Speed Steel (HSS) Cutting Tools
Table No. 1
MATERIAL BRINELL (BHN) DRILLS  S.F.M. TAPS-S.F.M. THREADS PER INCH
3-7 1/2 8-15 16-24 25 UP
Aluminum 99-101 200-250 50 100 150 200
Aluminum Bronze 170-187 60 12 25 45 60
Bakelite 80 50 100 150 200
Brass 192-202 200-250 50 100 150 200
Bronze, Common 166-183 200-250 40 80 100 150
Bronze, Phos.; 1/2 Hard 187-202 175-180 25 40 50 80
Bronze, Phos.; Soft 149-163 200-250 40 80 100 150
Celluloid 100 50 100 150 200
Copper 80-85 70 40 80 100 150
Copper, Mang.; 30% Min. 134 15
Duralumin 90-104 200 50 100 150 200
Everdur 179-207 60 20 30 40 50
Iron, Cast; Soft 126 140-150 30 60 90 140
Iron, Cast; Med. Soft 196 80-110 25 40 50 80
Iron, Cast; Hard 293-302 45-50 10 20 30 40
Iron, Cast; Chilled 402 15 5 5 10 10
Iron Malleable 112-126 85-90 20 30 40 50
Monel 149-170 50 8 10 15 20
Nickel, Pure 187-202 75 25 40 50 80
Nickel Steel; 3 1/2% 196-241 60 8 10 15 20
Rubber, Hard 100 50 100 150 200
Screw Stock; C.R. 170-196 110 20 30 40 50
Steel, Carbon 175-225 70 30 40 50 50
Steel, Drop Forged 170-196 60 12 25 45 60
Steel, Machinery 170-196 110 35 50 60 85
Steel, Magnet; Soft 241-302 35-40 20 40 50 75
Steel, Magnet; Hard 321-512 15 5 10 15 25
Steel, Mang.; 7-13% 187-217 15 15 20 25 30
Steel, Mild; .20-.30C 170-202 110-120 40 55 70 90
Steel, Molybdenum 196-235 55 20 30 35 45
Steel, Spring 402 20 10 10 15 15
Steel, Stainless 150-225 50 8 10 15 20
Steel, Stainless 460-520 20 8 10 15 20
Steel, .40-.50C 170-196 80 20 30 40 50
Steel, Structural; A-36 160 110 40 55 70 90
Steel, Tool; S.A.E. and Forging 149 75 25 35 45 55
Steel, Tool; S.A.E. and Forging 241 50 15 15 25 25
Steel, Tool; S.A.E. and Forging 402 15 8 10 15 20
Zinc, Alloy 112-126 200-250 50 100 150 200

Note: 1) HSS reaming tools should be at approximately 2/3 of Drill RPM. 2) Carbide tools should be at approximately double above values.

Cutting Speeds Table #3 Chart

CuttingSpeedsTableNo3Chart.pdf

Table No. 3 – Tapping, MM of one (cast iron)
SIZE SERIES TAP    DRILL 75% RPM @             100 S.F.M. HP @    100 S.F.M. TORQUE IN-LBS.
6-32 UNC .1077 2775 .19 4.4
6-40 UNF .1138 2775 .12 2.9
8-32 UNC .1337 2335 .2 5.4
8-36 UNF .137 2335 .16 4.3
10-24 UNC .149 2016 .35 10.9
10-32 UNF .1597 2016 .2 6.4
12-24 UNC .175 1773 .36 12.6
12-28 UNF .1813 1773 .27 9.5
1/4-20 UNC .2115 1532 .51 21
1/4-28 UNF .2153 1532 .27 11
5/16-18 UNC .2589 1226 .64 33
5/16-24 UNF .2715 1226 .37 19.1
3/8-16 UNC .3144 1021 .82 50
3/8-24 UNF .334 1021 .38 23.3
7/16-14 UNC .3681 875.5 1.1 77
7/16-20 UNF .3890 875.5 .54 39
1/2-13 UNC .4251 766 1.25 102.6
1/2-20 UNF .4515 766 .55 45
9/16-12 UNC .4817 681 1.5 136
9/16-18 UNF .5089 681 .68 62.5
5/8-11 UNC .5365 613 1.75 180
5/8-18 UNF .5714 613 .68 70
3/4-10 UNC .6562 511 2.1 264
3/4-16 UNF .6894 511 .87 107
7/8-9 UNC .7667 438 2.7 382
7/8-14 UNF .8056 438 1.1 163
1″-8 UNC .8781 383 3.4 553
1-12 UNF .9192 383 1.5 253
1 1/8-7 UNC .9857 340 4.4 812
1 1/8-12 UNF 1.0442 340 1.6 286
1 1/4-7 UNC 1.1107 306 4.4 910
1 1/4-12 UNF 1.1692 306 1.6 320
1 3/8-6 UNC 1.2125 279 6 1356
1 3/8-12 UNF 1.2942 279 1.6 353
1 1/2-6 UNC 1.3375 255 6 1489
1 1/2-12 UNF 1.4192 255 1.6 387
1 3/4-5 UNC 1.5552 219 8.7 2496
2″-4 1/2 UNC 1.7836 191 10.7 3530
2 1/4-4 1/2 UNC 2.0336 170 10.8 4005
2 1/2-4 UNC 2.2565 153 13.7 5628
2 3/4-4 UNC 2.5065 139 13.8 6230
3″-4 UNC 2.7565 127 13.8 6831
3 1/4-4 UNC 3.0065 118 13.9 7433
3 1/2-4 UNC 3.2565 109 13.95 8035
3 3/4-4 UNC 3.5065 102 14 8636
4″-4 UNC 3.7565 96 14 9238

 

PIPE TAPS (TAPER)
The following H.P. and Torque specs are based on tapered hole. If hole is straight, multiply by (3) three.
1/8-27 NPT R 948 .54 36
1/4-18 NPT 7/16 706 1.17 103
3/8-18 NPT 37/64 565 1.69 133
1/2-14 NPT 23/32 455 2.00 277
3/4-14 NPT 59/64 364 2.06 356
1-11 1/2 NPT 1 5/32 291 3.07 663
1 1/4-11 1/2 NPT 1 1/2 231 3.48 950
1 1/2-11 1/2 NPT 1 47/64 201 4.08 1280
2-11 1/2 NPT 2 7/32 161 5.31 2080