Inner  opener bits

Crown  opener bits

External  pipe

Internal

pipe

Internal/External

pipe  adapter

Small/Big  adapter

146系列 146 Overburden Drilling

(mm)

Diameter

ø 156

ø 115

ø146

Ø76(ø73)

Ø75 /  ø146

Ø75 /ø146

(mm)

Length

-

-

2000

2000

250 /  300

350

Thread

R122-2/3

R56

R122-2/3

R56

R56 /  R122-2/3