Large Diameter DTH Drill Bit for Pile Foundation Rock Drilling

• Customized: Customized
• Standard: API, ISO
• Type: DTH Drill Bit
• Material: Tungsten Carbide
• Usage: Well Drilling, Coal, Ore, Water Well
• Condition: New
• Model NO.: 311-1000mm
• Transport Package: in Plywood Case
• Specification: DTH
• Trademark: ND
• Origin: Changsha, Hunan, China
• HS Code: 8207199000
• Production Capacity: 100 Sets/Month

Product Description

1. Flat,concave and convex faces 
2. Spherical, ballistic, parabolic button 
3. Easy operation 

Features:
1. Applicable hard,very hard and medium soft rock formations.
2. Reliable quality, long service life,  rare abnormal breakage during service life.
3. Good flushing effect to ensure high drilling rate
4. Strict quality warranty and compensation rules

Order guide:
Bit Dia.+ Shank + Face shape + Carbide button shape
Examples For Ordinary Bits
Concave, spherical+ballistic(other designs of faces and inserts are available)