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Rock
Bits
 
Rock
bits include steel teeth and tungsten carbide bits. Special types
of bits can also be customized: e.g. tricone bits equipped with
a center nozzles, extended nozzles, dual nozzles, erosion resistant
watercourse, diamond enhanced gage and OD stabilizing pad, as well
as small size single cone bits.
Rock
Bit Sizes and Types
|
Bit
Size
|
API
Reg.
Pin Shank Size(in)
|
Steel
Teeth Bits
|
Tungsten
Carbide Bits
|
|
in
|
mm
|
|
3-3/8
|
85.7
|
2-3/8
|
331,321
|
617
|
|
3-1/2
|
88.9
|
321
|
|
|
3-7/8
|
98.4
|
211
|
537,617,637,737,837
|
|
4
|
101.6
|
|
537
|
|
4-5/8
|
117.5
|
2-7/8
|
211,311,321
|
537,617,637,737,837
|
|
4-3/4
|
120.6
|
321
|
7 |
|
5-1/8
|
130.2
|
3-1/2
|
121,321
|
637
|
|
5-5/8
|
142.9
|
121,132,211,311,321
|
537,637
|
|
5-7/8
|
149.2
|
136,211,311,321
|
517,537,617,637,622,632
|
|
6
|
152.4
|
136,211,216,311,321
|
517,537,617,637,737
|
|
6-1/8
|
155.6
|
321
|
537,637
|
|
6-1/4
|
158.7
|
121,131,211,321,214,215
|
622,632,732
|
|
6-1/2
|
165.1
|
126,136
|
517,537,617,637
|
|
6-3/4
|
171.4
|
121,131,211,311,321
|
537,637,837,622,632,732
|
|
7-1/2
|
190.5
|
4-1/2
|
121,131,211,311,321
|
537
|
|
7-5/8
|
193.7
|
121,211,114,124,126
|
537,637
|
|
7-7/8
|
200
|
111,121,131,211,311,321,114,124,116,
126,136,216
|
437,517,537,617,637,737,837,515,622,
632,732
|
|
8-3/8
|
212.7
|
116,126,136
|
517,537,617,637
|
|
8-1/2
|
215.9
|
111,121,131,211,311,321,114,124,134,
214,116,126,136,216,117,127,137,217
|
417,427,437,447,517,527,537,547,617,
637,737,837,515
|
|
8-5/8
|
219.1
|
211
|
537,637
|
|
8-3/4
|
222.2
|
111,121,131,211,311,321,114,124,
134,214,116,126,136
|
517,537,617,637,622,632,732,832
|
|
9-1/2
|
241.3
|
6-5/8
|
121,131,211,114,124,134,116,126
|
417,437,517,537,617,637,737,837,515
|
|
9-5/8
|
244.5
|
121,131,211,114,124,134,126,136,216
|
517,537,617,637,737,515
|
|
9-7/8
|
250.8
|
111,121,131,211,311,321,124,214,116,
126,136
|
517,537,617,637,622,632,732,832
|
|
10-5/8
|
269.9
|
121,131,211,126,136
|
517,537,617,637,515,615,622,632,732,
832
|
|
11
|
279.4
|
|
517,537,617,515,615,622,632,732,832
|
|
12-1/4
|
311.1
|
121,131,211,311,114,124,134,214,116,
126,136,216,117,127,137,217
|
417,427,437,447,517,527,537,547,617,
637,737,837,515,615,622,632,732,832
|
|
13-1/2
|
342.9
|
111,211
|
517,515,615
|
|
13-5/8
|
346.1
|
131
|
0
|
|
13-3/4
|
349.3
|
0
|
622,632,732,832
|
|
14-3/4
|
374.6
|
7-5/8
|
121
|
615
|
|
15
|
381
|
0
|
622,632,732,832
|
|
15-1/2
|
393.7
|
121,131
|
0
|
|
17-1/2
|
444.5
|
111,121,131,211,114,124,134,214
|
415,435,515,535,615,517
|
|
26
|
660.4
|
8-5/8
or 7-5/8
|
111
|
|
|
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Copyright 2002
© Unitech Asia Pacific Limited
All rights reserved.
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