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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
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121,132,211,311,321
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537,637
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5-7/8
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149.2
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136,211,311,321
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517,537,617,637,622,632
|
6
|
152.4
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136,211,216,311,321
|
517,537,617,637,737
|
6-1/8
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155.6
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321
|
537,637
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6-1/4
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158.7
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121,131,211,321,214,215
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622,632,732
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6-1/2
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165.1
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126,136
|
517,537,617,637
|
6-3/4
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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
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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
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8-1/2
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215.9
|
111,121,131,211,311,321,114,124,134,
214,116,126,136,216,117,127,137,217
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417,427,437,447,517,527,537,547,617,
637,737,837,515
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8-5/8
|
219.1
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211
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537,637
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8-3/4
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222.2
|
111,121,131,211,311,321,114,124,
134,214,116,126,136
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517,537,617,637,622,632,732,832
|
9-1/2
|
241.3
|
6-5/8
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121,131,211,114,124,134,116,126
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417,437,517,537,617,637,737,837,515
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9-5/8
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244.5
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121,131,211,114,124,134,126,136,216
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517,537,617,637,737,515
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9-7/8
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250.8
|
111,121,131,211,311,321,124,214,116,
126,136
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517,537,617,637,622,632,732,832
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10-5/8
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269.9
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121,131,211,126,136
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517,537,617,637,515,615,622,632,732,
832
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11
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279.4
|
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517,537,617,515,615,622,632,732,832
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12-1/4
|
311.1
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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
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342.9
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111,211
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517,515,615
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13-5/8
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346.1
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131
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0
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13-3/4
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349.3
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0
|
622,632,732,832
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14-3/4
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374.6
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7-5/8
|
121
|
615
|
15
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381
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0
|
622,632,732,832
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15-1/2
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393.7
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121,131
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0
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17-1/2
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444.5
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111,121,131,211,114,124,134,214
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415,435,515,535,615,517
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26
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660.4
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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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