Packaging & Paper

The product description：We should try our best to choose the drill rods which have many advantages such as proper section,Website:http://www.qianruidrill.com, lighter weight, shorter length, good rigidity and long life with meeting the requirements of drill hole. For rock drilling with drill rod in person’s hands, H22 and H25 drill rods should be chose which are hexagonal drill rods with taped connection, and the size of the tail of drill rod is 108mmxH22, the material is 55SiMnMn, 95CrMo.etc; For rock drilling of drifting, we choose the drill rods such as the drill rods with hexagonal cross section,threaded connection and same-diameter, the drill rods with hexagonal cross section,threaded connection and different-diameter and quick-change drill rods (H25,H28、H32,H35) generally. For rock drilling for production (underground mining and strip mining), we choose the drill rods such as the drill rods with circular cross section,threaded connection and same-diameter, the drill rods with circular cross section,threaded connection and different-diameter and quick-change drill rods (D35,D38 ,D45、D51、D60、D65、D76、D87) generally.?Matters needing attention1.Properly choose the appropriate drill rod per the testing comparison or the product recommendation of our company.2.Please make sure that the drill rod is well fit with the bit (uniform tamper); if the taper of drill rod is less than that of the bit, the top-point will be easily broken.?3.It is recommended to use the bill rod sets for place where the depth of rock drilling hole is more than 2.0m. That means firstly open the pore with a short bill rod and then continue to punching with a long drill rod to extend the working life of drill rod (based on different depth of the rock drilling hole, two or three drill rod sets could be used)?4.Please keep in a stable condition while opening pore and accordingly reduce the pushing air volume, the bill rod is not permitted working under bending-stressed condition, otherwise, the work