Hexagonal hollow driftter rod made by kat drill includes hex25 hex28 hex32 hex35

In Top Hammer Drilling, the hammer delivers a percussive force to the drill rods or tubes, which is then transmitted to the drill bit. The feed device is typically attached with a hinged boom to a mobile unit. The percussive system strikes the drill rod at a rate of 2,000-5,000 times per minute.
2.The rotation speed can range from 60 to 200 rounds per minute, allowing for the drilling of holes in even the hardest rock. To remove excess material (cuttings), pressurized air or water is used to flush it up from the bottom of the hole.
3.Top hammer drills are predominantly utilized in the mining, construction, and quarrying of rock materials. The combination of top hammer drilling with the “drill and blast” method results in an exceedingly efficient excavation process.