Description
Description
The ND35A is a 3-inch high-pressure Down-the-Hole (DTH) hammer engineered for fast and reliable drilling in hard rock formations. It’s widely used in ore mining, water well drilling, construction, and geotechnical exploration, especially where smaller boreholes are required.
Highlights
- No Foot Valve Bit Design: Eliminates issues related to valve breakage or thermal expansion, improving reliability.
- Simplified Internal Structure: Fewer parts and heat-treated components make maintenance easier and extend service life.
- High Impact Frequency: Offers 15–30% faster drilling speeds compared to foot-valve-equipped hammers.
- Forged Steel Construction: Ensures durability in demanding drilling environments.
- Convex Face Bit Compatibility: Designed to work with convex face bits featuring wear-resistant buttons for stable performance
Specifications
- Hole Range – 90mm-115mm
- Hammer Length (Bitless)-886mm
- Weight – 24.2kg
- Outer Diameter – 82mm
- Connection – API 2 3/8″ Reg
- Work Pressure – 1.0 – 1.7 Mpa
- Recommended Roration Speed – 30-50 rotations/min.
- Air Consumption – For 1.0Mpa = 4m3/min, For 1.5Mpa = 6.5m3/min.
