



89mm-T51 retract top hammer bit uses YK05 or GF20G as materials of button and 23CrNi3Mo or 45CrNiMoV as materials of body. 89mm T51 bit has Flat face and retract body with 8*12mm gauge round buttons and 6*12mm front round buttons. 89mm T51 retract bit is widely used on quarrying and surface mining.
Model |
89mm T51 Retract |
Material |
Button: YK05 OR GF20GBody: 23CrNi3Mo, 45CrNiMoV |
Thread Type |
T51 |
Head Dia. |
89mm |
Face Design |
Flat Face, Drop Center, Convex, Dome, Reamer |
Button Set |
8*12mm+6*12mm |
Button Shape |
Spherical, Ballistic, Semi-ballistic, Conical |
Body type |
Regular, Retrac, Pilot |
Application |
Quarrying, Surface Mining, Underground Mining, Tunneling, Bolting, Well Drilling, Foundation Drilling |
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