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OSG
TAPPING GUIDE |
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CARBON |
HIGH |
TOOL & DIE |
STAINLESS |
NICKEL ALLOYS |
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STEEL |
STRENGTH |
STEEL |
STEEL |
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1010-1050 |
4140-4340 |
D2,H13,S7,P20 |
304,316,400 |
TITANIUM, INCONEL |
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HR, CR, A36 |
UP TO 35 HrC |
UP TO 35 HrC |
UP TO 32 HrC |
PH SERIES UP TO 44
HrC |
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| SERIES |
HY-PRO |
HY-PRO |
HY-PRO |
EXO-VA3 |
EXOTAP VC-10, TI, NI |
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| LIST# INCH |
280, 289 POT |
280, 289 POT |
280, 289 POT |
300, 342 POT |
312, 312NI, 312TI,
344 POT |
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| LIST# METRIC |
290, 299 SFT |
290, 299 SFT |
290, 299 SFT |
303, 343 SFT |
313, 313NI, 313TI,
345 SFT |
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| CATALOG PAGE |
191-192,176-178 |
191-192,176-178 |
191-192,176-178 |
187-188,164-166 |
183-186, 159-163 |
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| SPEED |
30 SFM |
25 SFM |
15 SFM |
20 SFM |
8 SFM |
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| COOLANT &
DIN |
191-194,168-171 |
191-194, 168-171 |
191-194,168-171 |
USE HY-PRO BELOW |
N/A |
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| SPEED |
USE HY-PRO COOLANT THRU LIST 230,239 AND 260, 269 FOR BELOW
APPLICATIONS |
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| COOLANT ONLY |
100-200 SFM |
50-150 SFM |
40-120 SFM |
50-120 SFM |
N/A |
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| TAP, H LIMIT & DRILL SIZE |
RPM* |
RPM* |
RPM* |
RPM* |
RPM* |
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| 2-56 H2~.070 |
1,400 |
700 |
400 |
900 |
380 |
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| 4-40 H2~.093 |
1,000 |
800 |
500 |
700 |
270 |
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| 6-32 H2~.113 |
800 |
700 |
410 |
580 |
220 |
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| 8-32 H2~.136 |
700 |
580 |
325 |
440 |
185 |
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| 10-32 H3~.161 |
600 |
500 |
300 |
400 |
160 |
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| 1/4-20 H5~.205 |
430 |
390 |
230 |
300 |
120 |
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| 5/16-18
H5~.261 |
325 |
300 |
180 |
240 |
95 |
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| 3/8-16 H5~.316 |
300 |
250 |
150 |
200 |
80 |
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| 1/2-13 H5~.437 |
230 |
190 |
115 |
150 |
60 |
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| 5/8-11
H5~..535 |
190 |
160 |
90 |
130 |
50 |
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| 3/4-10 H5~.665 |
150 |
125 |
75 |
100 |
40 |
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| 1"-8
H5~.900 |
115 |
95 |
60 |
75 |
30 |
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HARD TAPPING FROM 42-65
HrC |
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| EXOTAP VCX |
CATALOG PAGE 218. POWDER METAL TAPS FOR MATERIALS
42-53 HrC.USE 8-15 SFM |
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| EXOCARB VCX |
CATALOG PGS 211-212. CARBIDE TAPS FOR MATERIALS
50-65 HrC. USE 3-10 SFM |
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| *RPM
IS SUGGESTED STARTING POINT AND MAY BE ADJUSTED FOR CONDITIONS, RPM IS STATED
SFM. DRILL SIZES AND H LIMITS |
| SHOULD
PRODUCE CLASS 2B-3B THREADS. PLEASE USE OSG DRILLS FOR BEST RESULTS AND HOLE
SIZE CONDITIONS. |
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| POT=
SPIRAL POINT FOR THRU HOLE, SFT= SPIRAL FLUTE FOR BLIND HOLE. |
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| THE
ABOVE CHART IS A GENERAL GUIDELINE.
OSG HAS MANY OTHER STYLES OF TAPS TO FIT SPECIFIC APPLICATIONS. |
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