Mobidrill - Products

Down-The-Hole Hammers GD 3.5 Configuration: Hammer length without bits: Thread: Outer diameter: Wrench Flat: Weight (kg): 908mm API 2.3/8” REG 80mm 60mm 25.5kg Technical Specifications: Working pressure (Bar): Air consumption (M3/min): Working pressure: Shank style: 10 - 18 - 24 4.8 - 6.8 - 12.6 10~24 bar DHD3.5

The impregnated diamond bits are the most commonly used bits in the mineral exploration industry as they have the widest range of applications.

Drag Bits Drag bits have short blades, each forged with a cutting edge and faced with tungsten carbide tips. A blade bit is a drag bit in which the blades can be replaced.

Tungsten Carbide Insert Bits have carbide inserts pressed onto the cone. The carbide teeth are extremely hard and act as chisels to break up the formation. Due to the initial cost of the type of bit, longer runs are insured with the use of sealed bearings. Carbide button bits have useful life even if several carbide inserts are broken off, chipped, or missing. This extended life feature ensures maximum payoff in increased run time and less actual cost per metre.

Tooth bits have milled teeth in various patterns about the cone, to provide chisels that rotate to break up the material being drilled. Teeth are made of special steel and are subject to abrasive wear. The pattern of the tooth placement along with the number and shape of the teeth will determine the formation that best can be drilled with a certain bit. Formations that can be drilled range from extremely soft to extremely hard.