Tricone bit use Journal bearing,hardfaced head bearing surface.,cone bearing inlaid with friction reducing alloy and then silverplated. The load capacity and seizure resistance of the bearing is greatly improved. O-ring seal is made of the more wear resistance high saturated bunawith the increased seal section and precisely designed sealing flange in the cone sealing area increased the reliability of the seal. The bit bearing can be ball locked For steel tooth bit, the tooth surface is hardfaced with new type of wear resistan. Material and thus extended working life of the cutting structure while still maintaining high ROP ----Cutting Structure Steel Tooth: Premium tungsten carbide hard facing on the surface, it's greatly enhance the wear resistance of the tooth. Tungsten Carbide Inserts: Various type high quality tungsten carbide inserts can be equipped on the bits, professional and scientific selection of the inserts as per the different application and drilling process to achieve high efficient drilling production. 
| Basical Specification | |
| Size of Rock Bit | 8 1/2" |
| 215.90 mm | |
| Bit Type | Steel Teeth Tricone Bit/ Milled teeth Tricone Bit |
| Thread Connection | 4 1/2 API REG PIN |
| IADC Code | IADC 217 |
| Bearing Type | Journal Sealed Roller Bearing |
| Bearing Seal | Rubber Seal |
| Heel Protection | Available |
| Shirttail Protection | Available |
| Circulation Type | Mud Circulation |
| Drilling Condition | Rotary drilling,high temp drilling,deep drilling,motor drilling |
| Nozzles | 3 |
| Operating Parameters | |
| WOB (Weight On Bit) | 17,077-46,087 lbs |
| 76-205KN | |
| RPM(r/min) | 60~150 |
| Formation | Soft to medium formations with high compressive strength, such as mudstone,medium-soft shale,hard gypsum,medium-soft limestone,medium soft sandstone,soft formations with harder interbed ,etc. |
