Origin

China

1.journal bearing.hardfaced head bearing surface.cone bearing inlaid with friction reducing alloy the silver plated. The load capacity and seizure resistance of the bearing is greatly improved
2.O-ring seal is made of the more wear resistance high saturated buna-N with the section and precissely designed sealing flange in the cone sealingarea increased the reliability of the seal.
3.the bit bearing is ball which can be applied to high rotary speed drilling
4.new type of grease that can sustain high temperature up to 250 å ì™ì˜™utilized
5.high wear resistance and excellent cutting ability of the insert bit are given full play by using carbide compacts of high strength and high touchness in combination with optimized comjpact numbers and rows, the exposure height and special shaped compacts