12 1-4 inch Tricone hard rock drill bit for water well drilling 
Basical Specification
Size of tricone bit: 12 1-4 inch;311mm
Thread Connection: 6 5/8'' API reg pin
IADC Code: 517
Bearing type: Rubber/Metal bearing

Operating Parameters
WOB(Weight on bit): 0.5-1.0 KN/mm (bit Dia.)
Rotary speed: 140-60 r/min
Make up torque: 38~43.4KN.M

Formation: soft formation with low compressive strength and high drillability,such as mudstone,gypsum,salt,soft shale,soft limestone,etc.

Advantage
1. High-strength, high flexibility, high temperature and high wear resistance.
2. High-precision metal seal.
3. Locking roller ball, to adapt to high-speed.
4. The use of high strength high toughness carbide teeth,
5. Hours in the rotary cone bit with the impact, crushing and shearing the role of broken rock.
6. Cone bit to adapt to the soft, medium and hard of various strata.
7. Reasonable price and long working life.