... alloy steelThe chains are high precision and high strength chains with forced lubrication.The drum is grooved. The high speed ... (14 ×56 1/4 )Sand drum capacity (14.5 drill line) m(ft)3500 (11480 )4500 (14760 )6000 (19685 ) ... us your inquiry.3. When our trade manager is off line, please feel free to leave a message, and tell ... Rig,JC30,JC40,JC50,JC70,JC90New Arrivel,American Quality,Competitive Price