Crawler rotary drill
max. ø 3 m | SR420 SANY Heavy Industry

- Large Drill depth: With Max. drilling depth 110m and Max.diameter 3m, it is used in big and deep pile foundation construction such as urban high-rise building, railway,highway, bridge and so on;
- Intelligence king:Judge manual operation rationality intellectually by electric control signal. When accident occurs,controller will control the machine temporarily and maximally avoid human error accident;
- Energy-saving king; Equipped with the most advanced anti-saturated load sensitive system, the hydraulic system of compensation behind valve and the caterpillar C15 engine adopting ACERT technology to reduce oil consumption and emission;
- Pioneered automatic pulse feeding rock crushing technology greatly enhances rock drilling efficiency through applying the periodic pulse pressure conforming to rock crushing mechanism and finally realizes automatic rock drilling;
- 5-level anti-vibration technology absorbs drilling vibration all-directionally to guarantee high stability;
- Rotary drive is equipped with 3 sets of motors and reducers,providing 420kN.m torque output; unique high efficiency lubrication system is provided to ensure normal operation under high temperature environment; three drilling modes of common, low speed high torque, high speed low torque; spin off is optional to meet various construction requirements;
- The upper part of mast adopts truss structure, lower part adopts box structure. It can bear strong bending and pressure, as well as absorb vibration;
- Crowd winch has two operation modes-normal lifting and fast lifting to improve push efficiency;
- The main winch has highlights of touch-bottom protection,priority control and fast line speed;