BIT 38 MM SR28(R28) for drifting ,tunneling and stone quarrying

Made from high alloy steel and tungsten carbide as same grade as internationally well-known brand
Apply “hot (thermal) -insertion” processing procedure to insert the buttons as same as internationally well-known brand
Entire CNC processing procedure ensure the quality consistency
Military grade requirements of heat-treatment guarantee durability

Fast penetration rates, and straight and clean hole quality. Long life of drilling holes.

Q7-38-R25 Threaded Button Bit

Code No.: Q7-38-R25
Thread Type: R25
Diameter: 38mm
Length: 90mm
Gauge Buttons: 9mm*5
Front Buttons: 7mm*2
Carbide Design: Semi-ballistic
Skirt Design: Standard
Weight: 0.51kg
Water Holes: 1 on front, 1 on side

Q7-43-R28 Threaded Button Bit

Code No.: Q7-41-R28
Thread: R28
Diameter: 43mm
Gauge Buttons: 5*9.5mm
Front Buttons: 2*8mm
Skirt Design: Standard
Weight: 0.68KG
Carbide Design: Ballistic
Face Design: flat

R25-45mm Threaded Cross Bit

Code No.: S1-45-R25-105
Diameter: 45mm
Length: 105mm
Thread Type: R25
Carbide Dimension: 14mm*8mm
Water Holes: 1 on front, 4 on side
Weight: 0.66Kg