Gold Member Since 2014
Audited Supplier
Xiamen Bestlink Factory Co., Ltd.

Bits, DTH Bits, Button Bit manufacturer / supplier in China, offering Factory Price Middle Air Pressure DTH Drill Bits for Mining, Veneer Stone Splitting Machine for Making Backsplash Tiles, Mission 40 High Air Presure DTH Button Bits and so on.

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Factory Price Middle Air Pressure DTH Drill Bits for Mining

FOB Price: US $2,000 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $2,000/ Piece
Get Latest Price
Production Capacity: 5000 PCS / Month
Transport Package: Wooden Case
Payment Terms: L/C, T/T, Money Gram, Western Union

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Basic Info
  • Model NO.: BR3
  • Material: Tungsten Carbide
  • Model Number: Br1, Br2
  • Application: Energy, Transportation, Metallurgy, Building etc.
  • Hole Diameter: 64mm - 90mm
  • Specification: ISO
  • HS Code: 82071990
  • Type: Center Drill Bit
  • Usage: Well Drilling, Rotation Impact Drilling
  • Machine Type: Drilling Tools
  • Condition: New
  • Trademark: BESTLINK
  • Origin: Xiamen, China
Product Description
DTH bit is also our main product. After mang years search, we have rich experience in development and manufacturing high quality products, which adopted high-quality raw materials, advanced technology and passed through strictly inspection.
1.Various air pressure down-the-hole drill bits 
2.Low air pressure hole Dia.:65-220mm  
3.High air pressure hole Dia.:85-305mm  
4.Face type: drop center / concave / convex / double gauge / flat  
 
Technical Data:
Drill BitsBit Dia. (mm)NO. of Air holesGauge ButtonsFront ButtonsWeight (KGS)Part No.
BR16426×φ103×φ102.6HBR1-64
7026×φ124×φ92.8HBR1-70
7626×φ125×φ103.2HBR1-76
BR27626×φ125×φ103.6HBR2-76
8026×φ135×φ104HBR2-80
9026×φ136×φ104.2HBR2-90
HD257626×φ135×φ103.6HD25-76
8226×φ144×φ114HD25-82
9028×φ125×φ124.2HD25-90
 We can design and manufacture according to customer's requirement of the bit dia., no. of air holes, carbide button shape and face shape.
 
----Selection of DTH BIT FACE SHAPE AND CARBIDE BUTTON SHAPE----
 
A: Bit face shape selection

DropCenter Bit
For high penetration rates in soft to medium-hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.
Concave face
The all-round application bit face specifically for medium hard and homogenerous rock formations. Good hole deviation control and good flushing capacity.
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 the load and wear on the gauge buttons, but poor hole deviation control.
Double Gauge face
This kind of face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressures and good resistance to steel wash step gauge bit.
Flat Face Bit
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.
 
B: Insert Carbide Button Shape Selection
 
Matching the insert to the job requirements is essential in achieving the desired results.  Different buttons is ideal for different ground conditions, abrasion levels, PSIs and penetration levels.  In general, the larger the number of gauge buttons the better overall performance, especially in hard rock.
 
Hemispherical
Height 0.5 Ø
Application Strength - multipurpose
Best suited to hard ground
25,000 to 45,000 PSI (170 to 300 MPa)
Abrasive to very abrasive
Ballistic Button
Height 0.75 Ø
Application Strength - fast penetration
Best suited to soft ground
10,000 to 20,000 PSI (70 to 140 MPa)
Non abrasive ground
Parabolic Button (semi ballistic)
Height 0.6 Ø
Application Strength - fast penetration
Best suited to medium ground
15,000 to 25,000 PSI (100 to 170 MPa)
Mildly abrasive ground
Conical Button
Height 0.65 Ø
Application Strength - fast penetration
Suited for all non-abrasive ground types
Smaller contact area
Best suited for smaller diameter bits
 
 
 
 
 
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