Customer Info
Mr. Tao Jigong, working on the Outer Ring Expressway project in Guilin, Guangxi.
Project Application
Advance drilling for bridge pile foundations in a karst area, known for complex and variable limestone formations.
Product Used
Fengsu 91# FS 4th-Generation Spiral Alloy Bit for Granite
(Designed for hard and abrasive rock layers, optimized for fast penetration and long service life.)
Ground Conditions
Limestone formation in a typical karst terrain, with fractured and variable rock structures that are often challenging for drilling equipment.
Performance Feedback
Mr. Tao reported impressive results:
- Drilling speed: 4–6 meters per hour in limestone
- Drill bit condition: Over 100 meters drilled so far with no visible wear or damage
Customer Review
Mr. Tao is highly satisfied with the durability and speed of the Fengsu bit. The bit performs well under high-speed drilling conditions and maintains excellent stability in complex formations.
Additional Info
Below is a video showing the actual drilling speed on-site, along with formation photos and geological information provided from the jobsite.
