M40-146 DTH Hammer Bit

Rock drilling tools manufacturer ProDrill offers a comprehensive range of DTH drill bits with M shanks type for a wide range of hole sizes, which have been designed to match all conceivable applications for water well industries, mining and construction.

• Code No.: M40-146
• Diameter: 146mm
• Air Holes: 2
• Gauge Buttons: 7
• Front Buttons: 7
• Carbide Design: Dome, Ballistic
• Face Design: Convex
• Shank Type: M

Shank types: M 30, M 40, M 50, M 60/65, M 380.

DTH rock drill bits hole diameter: 3”, 4”, 5”, 6”, 8”(85mm-305mm)

 Convex Face

A classic design for soft to medium hard rock formation which is not so abrasive. This design have very excellent penetration rate but poor in hole deviation if rocks are hard.

For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and  may reduce the load and wear on the gauge buttons, but poor hole deviation control.

Dome/Hemispherical Buttons

Universal buttons for all rock formation, best suited to hardest and very abrasive rock formation.

Semi-Ballistic/Parabolic Buttons

Excellent penetration rate, but only suited to medium hard and not so very abrasive rock formation.

with convex face, 7 dome 7 ballistic carbide buttons for blasting bore holes, water well drilling.