R32-102mm Drilling Tools: Pilot adaptor, button bit, and reaming bit

Integral reaming drill bit R32-102mm R32-102mm Drilling Tools: Pilot adaptor, button bit, and reaming bit;

Button bit reaming was a common practice in mining and quarrying for blast hole drilling.
Drilling accuracy and direction can be guaranteed with the use of pilot adapters.
Bit type: Reaming bits / Dome bits
Angle of Connection: 6 / 10 / 12 degrees
Pilot adaptor diameters: 26 / 28 / 35 / 40 mm, etc.
button bits with reaming diameters of 60, 64, 70, 76, 80, 89, 102, 127, and 150
Type of thread: R25, R28, R32, R38

Bits for Thread Reaming Drilling R32 Mining and well drilling 76mm, 89mm, and 102mm Top Hammer Rock Drilling Bits

Expert R32 Tunneling Accessories 102mm Drill Bit Reaming for Button Dome