Tianjin Grand Construction Machinery Technology Co., Ltd. deeply engaged in rock breaking tools more...
Hardfaced head bearing surface. Cone bearing inlaid with friction-reducing alloy and then silver plated. Abrasion resistance and seizure resistance of the bearing are improved.View More
Surface of the high precision bearing heat treated by using advanced heat treatment process to improve the load capacity and service life of the bearing.View More
Famous company cutters, umicore silver solder and saint-gobain high wear material, Good wear resistance enables you to complete the drilling task with one bit.View More
These kingdream drill bit, kingdream tricone bit, kingdream roller bit, kingdream drill bit are used to drill soft formation with low compressive strength and high drill ability, such as shale, clay, sandstone and soft limestone, etc.View More