Maximize your deep-hole drilling efficiency with the HD712 T45 D51 790 shank adapter. Specifically engineered for HD712 series hydraulic rock drills, this 790mm extra-long striking bar features a heavy-duty T45 thread and a massive 51mm diameter. Fully carburized for superior fatigue resistance and maximum linear energy transmission in high-torque hard rock tunneling.
Key Performance Advantages
Massive D51 Structural Rigidity: The 51mm cross-section provides extreme resistance to bending and shearing stresses, ensuring superior hole straightness even at extended 790mm lengths.
High-Torque T45 Connection: Designed for heavy production drill strings, the T45 thread prevents thread stripping or "cold welding" under maximum rotational forces.
Premium Wear & Fatigue Life: Full-body carburization and shot peening create a "glass-hard" surface to withstand bushing friction while preserving a highly ductile core.
Primary Applications
Underground Production Mining: Large-scale long-hole stoping and fan drilling.
Extra-Long Tunnelling: Rapid face development and complex umbrella arch support systems in hard rock.
Bench Drilling: High-penetration blasting for large-scale quarrying and civil foundation excavation.
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