A brief history of the development of hydraulic rock drilling machinery and equipment
2022-09-28
Now, the full hydraulic rock drilling rig has been widely used in infrastructure construction, highway, railway tunnel excavation and slope support, large and medium-sized open-air and underground mines, quarry, hydropower and water conservancy projects, national defense engineering construction and many other projects in the rock excavation, mineral resources mining, anchor bolt anchoring, and stone mining and other fields.
Overall carburizing finished brazing production process
2022-09-21
Overall carburizing finished brazing process: hollow steel incoming inspection-material screening-straightening-water needle hole processing-impact end processing
1. Tail shank Hex22 x 108mm, R25 thread, L:600mm
2022-09-21
2. Finished brazing rod Hex22 x 108mm, taper: 7 °, L: 600mm 3. Finished brazing rod Hex25 x 159mm, taper: 7 °, L: 350mm 4. Drill drill Hex22 x 108mm, D:20mm, L: 400mm
Drill bit diameter: 89mm,102mm,115mm,127mm,152mm
2022-09-15
Lianhuashan drilling tools, striving to pursue the high quality of drilling tools
T51-3660 thread drill pipe open-pit drill pipe
2022-09-08
T51-3660 thread drill pipe open-pit drill pipe
Production Process of Taper Drill Rod
2022-09-03
Production process of ordinary finished steel brazing: incoming inspection of hollow steel-material screening-straightening-water needle hole processing-impact end processing-pier squeeze collar plate-collar plate detection-brazing slight processing
Pay attention to lotus mountain drilling tools:
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