STEEL TOOTH BITS for Soft Formation
Available sizes: From 2 7/8 to 26"
Advantage: Most favourable price and high quality
Bearing type: Sealed bearing and non-sealed bearing
Metal sealed journal bearing
Rubber sealed journal bearing
Cutting structure: The back cone and the teeth all surface is are hardfaced strengthening, improved steel tooth shape and welding materials, showing teeth higher
Application formation: Soft with low compressive strength and high drillability, such as shale, clay, salt bed and etc
All our activities are accredited to ISO 9001: 2008 and API, both in products and services, at the same time, mature production technology ensuring the quality satisfy international request.
| Rock formation |
Bit type |
Bit size |
Drilling weight |
Rotary speed |
| mm |
inch |
kN/mm |
r/min |
| Very soft |
Soft Marl, Clays, Sands, Salts etc. |
1 |
187.3~346.1 |
7 3/8~13 5/8 |
441~735 |
120~50 |
| soft |
Clays, Soft Shale, Marl, Sands, Salts etc. |
2 |
95.2~174.6 |
3 3/4-6 7/8 |
245-490 |
100-50 |
| 187.3~346.1 |
7 3/8-13 5/8 |
490-784 |
90-40 |
| Medium soft |
Shale, Marl, Sandstone, Soft Limestone etc. |
3 |
95.2~174.6 |
3 3/4-6 7/8 |
245-490 |
80-40 |
| 187.3~311.1 |
7 3/8- 12 1/4 |
490-784 |
80-40 |
| medium |
Hard Shale, Limestone, Medium/Hard Sandstone etc. |
4 |
95.2~174.6 |
3 3/4-6 7/8 |
294-539 |
80-60 |
| 187.3~241.3 |
7 3/8-9 1/2 |
539-833 |
60-40 |
| medium hard |
Hard Dolomite, Limestone, Hard Sandy, Rock etc. |
5 |
95.2~174.6 |
3 3/4-6 7/8 |
294-539 |
80-60 |
| 187.3~241.3 |
7 3/8-9 1/2 |
539-833 |
60-40 |
| hard |
Sandy, Shale, Quartzite, Hard Dolomite, Hard Sandstone etc. |
6 |
95.~-174.6 |
3 3/4-6 7/8 |
294-539 |
80-40 |
| 187.3-215.9 |
7 3/8-8 1/2 |
580-882 |
60-40 |
| Very hard |
Quartzite, Chert, Basalt Granites, Pyrites etc. |
7 |
95.2-174.6 |
3 3/4-6 7/8 |
294-539 |
80-40 |
Audited Supplier 
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