WK Series High Air Pressure DTH Button Bit – Ultimate Lightweight Design for High-Speed Shallow Drilling (Φ108–Φ178mm)

The WK Series High Air Pressure Down-the-Hole (DTH) Button Bit is the ultimate lightweight solution for mainstream 4"/5" class high-pressure hammers, featuring an extremely short shank (143–170mm) that makes it the lightest among all series. This innovative design effectively reduces hammer load and enables high-speed drilling, making it the ideal choice for ultra-shallow holes and applications pursuing maximum drilling speed, such as foundation support and anchoring.

Engineered with a focus on speed and efficiency, the WK Series delivers exceptional penetration rates while maintaining reliable performance in medium-hard to hard rock formations. The lightweight construction reduces stress on drilling equipment, extends component life, and allows for faster feed rates and quicker cycle times.

Available in two model families – WK40 and WK50 – covering head diameters from Φ108mm to Φ178mm, the WK Series provides comprehensive coverage for shallow drilling applications where speed and maneuverability are paramount.

1. Foundation Support & Anchoring

The WK Series is the ideal choice for foundation support and anchoring applications where rapid drilling speed is critical, with the ultra-lightweight design enabling faster feed rates and quicker cycle times for shallow anchor hole installation.

2. Slope Stabilization

Widely applied in slope stabilization projects requiring rapid installation of rock bolts and anchors, where the lightweight construction reduces equipment fatigue and allows for high-speed drilling in medium-hard rock formations.

3. Ultra-Shallow Hole Drilling

Specifically engineered for ultra-shallow holes where maximum drilling speed is the primary objective, with the extremely short shank and minimal weight enabling exceptional maneuverability and rapid penetration.

4. Construction & Civil Engineering

Employed in various construction applications including micro-piling, foundation grouting, and light-duty drilling where speed and efficiency are paramount and hole depth is limited.

5. Underground Support

Used in underground construction for rapid rock bolting and support installation, where the lightweight design facilitates handling in confined spaces while maintaining high drilling speeds.

1. Ultimate Lightweight Design

Featuring the shortest shank among all series (143mm for WK40, 170mm for WK50) and weighing just 6.5–8.0 kg (WK40) and 12.6–17.2 kg (WK50), the WK Series is the lightest DTH button bit available, significantly reducing hammer load and enabling maximum drilling speed.

2. High-Speed Drilling Performance

The reduced weight and optimized design allow for faster feed rates, quicker retraction, and shorter cycle times, delivering exceptional productivity in shallow hole applications where speed is the primary performance metric.

3. Reduced Equipment Stress

The lightweight construction minimizes stress on drill rigs, feed systems, and hammers, extending equipment life and reducing maintenance costs while improving overall operational efficiency.

4. Optimized Button Configurations

Available with spherical + ballistic and domed button combinations, the WK Series delivers effective cutting action and wear resistance for medium-hard rock formations, balancing speed with reliable performance.

5. Versatile Face Designs

Available in convex, flat, and concave face configurations, the WK Series allows operators to select the optimal face design for their specific rock conditions and drilling requirements.

6. Mainstream Hammer Compatibility

The WK Series is designed for mainstream 4"/5" class high-pressure hammers, ensuring broad compatibility and easy integration with existing drilling equipment.

Q1: What makes the WK Series the ultimate lightweight DTH button bit?

The WK Series features the shortest shank among all series (143mm for WK40, 170mm for WK50) and is the lightest available, weighing just 6.5–8.0 kg for WK40 and 12.6–17.2 kg for WK50, effectively reducing hammer load and enabling high-speed drilling in shallow applications.

Q2: What are the head diameter ranges for the WK Series?

The WK40 covers Φ108–130mm while the WK50 covers Φ140–178mm, providing comprehensive coverage for shallow drilling applications including foundation support, anchoring, and slope stabilization.

Q3: What button types and face designs are available?

We offer spherical + ballistic and domed button combinations with convex, flat, and concave face designs, allowing you to select the optimal configuration based on your specific rock conditions and drilling requirements.

Q4: What is the expected service life of WK Series bits?

Service life varies depending on rock conditions and drilling parameters, but the lightweight design reduces impact stress on buttons while maintaining effective penetration, delivering reliable performance for shallow hole applications where speed is prioritized.

Q5: What are the shipping methods and delivery lead times?

We offer sea freight (20–30 days), air freight (5–7 days), and express courier (3–5 days), with standard production taking 15–20 working days and custom orders slightly longer – exact delivery schedules are confirmed upon order placement.

Q6: What after-sales service and technical support do you provide?

We provide a 12-month warranty against manufacturing defects, free remote technical support via phone, email, or video call, and on-site assistance upon request (travel costs apply) – maintenance manuals and genuine spare parts are also available for long-term support.

Q7: What payment methods do you accept?

We accept T/T (30% deposit + 70% before shipment), L/C at sight or usance, Western Union, and PayPal for samples, with Alibaba Trade Assurance also available – terms can be negotiated based on order volume and credit history.