Tricone Bit
|
Recommended torque by bit size |
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|
Bit size |
API screw |
Recommended torque |
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|
in |
mm |
in |
mm |
ft-lbs3 |
N-M |
|
3 1/2~4 1/2 |
89~114 |
2 3/8 REG. |
60 |
3000-3500 |
4000-4800 |
|
4 5/8~5 |
118~127 |
2 7/8 REG. |
73 |
6000-7000 |
8000-9500 |
|
5 1/8~7 3/8 |
137~187 |
3 1/2 REG. |
89 |
7000-9000 |
9500-12000 |
|
7 5/8~9 |
194~229 |
4 1/2 REG. |
114 |
12000-16000 |
16000-22000 |
|
9 1/2 ~28* |
241~711 |
6 5/8 REG. |
168 |
28000-32000 |
38000-43000 |
|
14 3/4~28* |
375~711 |
6 5/8 REG. |
168 |
28000-32000 |
38000-43000 |
|
|
|
7 5/8 REG. |
194 |
34000-40000 |
46000-54000 |
|
18 1/2~28* |
470~711 |
7 5/8 REG. |
194 |
34000-40000 |
46000-54000 |
|
|
|
8 5/8 REG. |
219 |
40000-60000 |
54000-81000 |
|
* Torque is largely related to a standard for a connected screw by bit size. |
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