This is a kind of high air pressure DTH hammer to fit DTH bits with air tubes (foot valve)
It has the characteristics as below:
1. Valve air distribution. More reliable and stable.
2. Simple design of the piston. Long service life.
3. More efficient energy transfer, faster drilling speed, lower air consumption, and lower oil consumption.
4. Fewer internal parts, simple structure, longer life, less failure and easier to maintain because all the spare parts are heat treated.
5. Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multistep thread.
You can find the DTH hammer model QL50 by clicking the link:
https://www.worldrill.com/bolehole-drilling-ql50-dth-hammer.html
