R32 Thread Button Bit 43/45/48/51mm

R32 is the most widely used drill bit for underground drifting. It is made of alloy steel and carbide , has wear resistance and corrosion resistance. Different button shapes are used in different rock formation structures, including excavation, hole expansion, etc. Different shaped head structures,

Thread: R32

Diameter: 43-127mm

Head shape: flat face, pilot ,dome

button:spherical,ballistic ,pike