Pneumatic DTH Hammer/hydraulic hammer for sale(NR90):
1. 10 years manufacturing experience;
2. Certificate: ISO9001:2008
3. Material: Carbide
NR Series DTH hammer, a kind of valve-equipped Low-Air-Pressure hammer with a single piston, a plate valve and a central exhaust structure. The compressed air is adopted as the driving force. To prevent dust pollution and get a better performance, some high-pressure water may be added into the air for wet rock drilling.
1. the strong energy of single impact and the low energy consumption in rock crushing;
2. the weight ratio of piston and bit almost reaches 1:1 to provide long effective acting time, which leads to the improved efficiency in rock crushing and to extended service life of the drilling tool;
3. a good performance in central air exhaust and cuttings discharge, which reduces the repeated crushing of rock;
4. a check valve device is available to drill holes under water.
The NR Series dth hammer , an ideal drilling tool, is widely used in such industries relating to energy, transportation, metallurgy, building etc.
NR90 DTH Hammer Technical Data
Length (Without Bit)
Weight (Without Bit)
Impact rate at 0.5Mpa
Recommended rotation speed
1. Top Sub
2. valve Seal
3. Check Valve
5. Compression Buffer
7. Valve cover
8. Guide Tube
10. Air Distributor
11. Internal Cylinder
13. External Cylinder
14. Guided Sleeve
15. Stop Ring
16. Drive Chuck
17. Drill Bit
We have advanced production equipments & talented researchers & technicians & rich experiences in R & D and production.
We use the best quality raw materials.
We adopt advanced production technology & strict testing procedure.
We passed ISO9001 quality management system certification.
We accept OEM manufacturing and produce on your design.