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Prevents Jamming and Sticking: The "retrac" skirt acts as a reamer when pulling the drill string back. If rock fragments fall behind the bit face, the grooves and rear cutting edges help crush the debris, allowing for a smoother withdrawal.
Improved Hole Straightness: The extended, reinforced body provides better centering within the borehole, significantly reducing hole deviation even in complex or changing geological conditions.
Enhanced Flushing Efficiency: The longitudinal grooves on the skirt provide extra space for air or water to carry rock cuttings out of the hole, keeping the bit face cleaner and maintaining high penetration rates.
Reduced Downtime: By minimizing "stuck drill" incidents, these bits save hours of labor and prevent the loss of expensive drill rods and hammers in collapsed holes.Versatility: Available in common thread standards like R32, T38, T45, and T51, they are easily integrated into existing top-hammer drilling rigs for mining and tunneling.
