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

121,126,136,216

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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