Rotary Blast Hole Drill Bits
Rotary drill bits for mining The BD Drill range of rotary drilling bits includes geometries and cemented carbide grades for different surface and compressive strengths, abrasiveness, massiveness and homogeneity of rock as well as for various penetration rates and capabilities and characteristics...
Rotary drill bits for mining
The BD Drill range of rotary drilling bits includes geometries and cemented carbide grades for different surface and compressive strengths, abrasiveness, massiveness and homogeneity of rock as well as for various penetration rates and capabilities and characteristics of the drill rig. Innovative bearing technology and improved geometry, materials and machining methods provide longer bearing life.
The selection of BD Drill rotary drill bits covers both blast hole bits for mining applications and bits suitable for construction and civil engineering applications. The product covers hole diameters from 159 to 406 millimeters (6 ¼ to 16 inches). Both air-cooled and sealed bearings are available, as well as various carbide grades and insert geometries with cutting structures optimized for all conditions.
1. Insert shapes and grades designed to provide long life and high productivity
2. Longer service life for decreased machine downtime
3. Air-cooled bearing performance optimized for high hours by advanced metallurgy, proportioning of components, and optimized geometries
Specification: IADC CODE 435
Size: 9 inch – 229mm
Application for drilling soft formations with low compressive strength and high drillability, such as shale, soft limestone, sandstone, conglometare, soft dolomite and coal bed, etc(Protodikonov's Hardness Coefficient of Rock f=7)
Bearing structure: Roller-Ball-Second Thrust-Roller-First Thrust/Sealing, abrasion-resistance carbide button insert on the bearing surface.
Circulation Type: Jet Air
-Inner Rows: Conical
-Gage Rows: Chisel
-Gage Bevel Protection: Round
Pin connection: 4 1/2” REG(API)
Nozzel: Φ19.5mm(THREE pcs) Interchangeable
Metric Bit Diameter: 229mm
Product Weight: 50 KG
Bit Legs Protection
Carbide alloy button insert on the legs’ surface, back and top space of legs build up welding of abrasion-resistant alloy.
Weight on Bit: 9000-36000 Lbs
Rotary Speed: 120-90 RPM
Air Back Pressure: 0.2-0.4 Mpa