July 28, 2010, SANYHM held the signing ceremony for the second generation of pilling equipment to present the newly launched rotary drill products. SR420Ⅱwhich has the largest capacity in Asia is the most attractive one.

The machine features max drill bore of 3m, max. drill depth of 110m, 420kN•m torque and extra pressure; larger lift capacity with rear-mounted single layer main hoist; highly intelligent power head adopts multi-gearshift control, which can be adapted to various tools and geological conditions. The dual big-triangle structure ensures the high stability and reliability, five-stage vibration-absorption technology, and steel wire guide device improves the reliability of the whole machine. The machine operation is more simple and convenient, and the work efficiency is improved. The SR420Ⅱ rotary drilling rig is a great success.