R25 / R28 / R32 6 12 Degree Pilot Adapter Reaming Bit For Quarrying Drilling

R25 / R28 / R32 6 12 Degree Pilot Adapter Reaming Bit For Quarrying Drilling 
 

R25 / R28 / R32 6 12 Degree Pilot Adapter Reaming Bit For Cut Holes Quarry Mining  




Introduction: 
 

Reaming bits is used for making large cut holes in drifting and tunneling. A smaller hole is first drilled and then reamed to the final size in combination with a pilot adapter. 

Button bit and Insert types

Spherical Button Characteristics
1. Universal button
2. Good wear resistance
3. Best suited for hard ground
4. 27000-48000PSI(180 to 320Mpa)
5. Suited for abrasive to very abrasive drilling conditions 

Ballistic Button Characteristics
1. Fast Penetration
2. Best suited for soft rock
3. 10000-20000PSI(70 to 140Mpa)
4. Suited for non-abrasive drilling conditions

Description: