Rock drilling tools manufacturer ProDrill offers a wide string of rock drill percussive drill bits: T38,T45,T51 Threaded Button Bits are one of the most important size for benching. rock drill bits are used in Sandvik , Epiroc, Furukawan, Sooson etc heavy duty top hammer focusing big and long hole drilling for bench and surface mining.
T51 BUTTON BITS
Diameter
(Metric)
Diameter
(Imperial)
Thread
Grade
Flat Face
hemispheric
Drop Centre
Hemispheric
Drop Centre
Ballistic
Drop Centre
Retrac
89mm
3 1/2"
T51
Standard/Heavy Duty
√
√
√
√
102mm
4"
T51
Standard/Heavy Duty
√
√
√
√
114mm
4 1/2"
T51
Standard/Heavy Duty
√
√
√
√
127mm
5
T51
Standard/Heavy Duty
√
√
√
√
152mm
6
T51
Standard/Heavy Duty
√
√
√
√
T45 BUTTON BITS
Diameter
(Metric)
Diameter
(Imperial)
Thread
Grade
Style
76mm
3"
T45
Standard
Flat Face
hemispheric
89mm
3 1/3"
T45
Standard
102mm
4"
T45
Standard
114mm
4 1/2"
T45
Standard
127mm
5
T45
Standard
T38 BUTTON BITS
Diameter
(Metric)
Diameter
(Imperial)
Thread
Grade
Style
76mm
3"
T38
Standard
Flat Face
hemispheric
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