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12 1/4" SGA745R

12 1/4" SGA745R is part of mining tri-cone drill bit, which is mainly used in large open-pit mining operations, such as open-pit coal mine, copper mine, molybdenum mine, iron ore mine and other non-ferrous metal mine.

PRODUCT SPECIFICATION

CUTTING STRUCTURE
Spherical on gage, double spherical on inner rows.
Designed for high compressive strength, hard and abrasive formations, such as granite, limestone, sandstone, dolomite.
Compressive strength: 46,000-56,000 psi/317-386 MPa
SHIRTTAIL PROTECTION
Hard welding and wear resistant carbide protection on shirttail lip and lug
PRODUCT SPECIFICATION
IADC Code: 745
Bearing Type: Roller-Ball-Roller-Thrust Button/Sealed Bearing
Circulation Type: Jet Air
Cutting Structure:
Inner and Nose Rows: Double spherical
Gage Rows: Spherical
Auxiliary Carbide: Spherical
Pin Connection: 6 5/8″ API REG
Metric Bit Diameter: 311mm
Product Weight: 215 lbs/98 kg
OPERATING SUGGESTIONS 
Weight on Bit: 49,000-85,750lb/22.2-38.9T
Rotational Speed: 60-90 rpm
Air Back Pressure: 29-58 psi/0.2-0.4 MPa

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NEWS

The History of Cemented Carbide

The initial development of cemented and sintered carbides occurred in Germany in the 1920s. ThyssenKrupp says, "Sintered tungsten carbide was developed by the "Osram study

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