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BR33-95 Dth Button Bits

● Bit Diameter: 64mm to 90mm ● Bit Face: Flat, Concave, Convex and Drop-Center ● Button Shape: Spherical, Ballistic, Parabolic and Conical ● Bit Shank: Sandvik, Atlas Copco, Ingersoll-Rand, Halco, Bulroc etc. ● High quality alloy steel and tungsten carbide, Optimum design, Multiple precision heat-treatment.

HAMMER INCH

BIT DIA(MM)

BIT DIA(INCH)

SHANK

1

64MM-76MM

2 1/2"-3"

BR1

2

76MM-90MM

3"-3 1/2"

BR2/PAD320

3

85MM-105MM

3 2/5"-4"

BR3/DHD330/COP32/PAD330

3.5

85MM-110MM

3 2/5"-4 1/3"

DHD3.5/IR3.5/COP34/QL30/PAD3.5

4

105MM-140MM

4"-5 1/2"

DHD340/COP44/QL40/SD4/MISSION40/PAD340

5

127MM-200MM

5"-8"

DHD350/COP54/QL50/SD5/MISSION50/PAD350

6

152MM-254MM

6"-10"

DHD360/COP64/QL60/SD6/MISSION60/PAD360

8

195MM-350MM

7.2/3"-13 4/5"

DHD380/COP84/QL80/SD8/MISSION80/PAD380

10

254MM-380MM

10"-15"

SD10/NUMA100/DHD1100/PAD1100

12

305MM-457MM

12"-18"

SD12/NUMA120/DHD1120/PAD1120

1. Flat Face 

 

This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.

 

2. Convex Face

 

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 theload and wear on the gauge buttons, but poor hole deviation control.

 

3. Concave Face

 

The all-around application bit face specifically for medium hard and homogeneous rock formations.

QQ截图20180507154420.jpg

 


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