QL Series High Air Pressure DTH Button Bit – Engineered for Epiroc QL Hammers, High-Energy Hard Rock Drilling (Φ108–Φ178mm)

The QL Series High Air Pressure Down-the-Hole (DTH) Button Bit is specifically engineered for Epiroc (Atlas Copco) QL series hammers, ensuring optimal energy transfer and maximum drilling efficiency. Designed for medium-hard to ultra-hard rock formations including granite and basalt, this series delivers exceptional performance in deep hole drilling and high-intensity mining operations.

Manufactured from premium alloy steel with precision-engineered tungsten carbide buttons, the QL Series features optimized domed and ballistic button combinations that provide superior impact resistance and wear characteristics. The precision-machined shank and spline configurations ensure perfect compatibility with QL series hammers, maximizing impact energy transfer to the rock face.

Available in two model families – QL40 and QL50 – covering head diameters from Φ108mm to Φ178mm, the QL Series provides comprehensive coverage for demanding drilling applications. Whether you are drilling deep blast holes in underground mines, production holes in hard rock quarries, or exploration holes in ultra-hard formations, the QL Series delivers the performance and durability required for the most challenging conditions.

1. Underground & Open-Pit Mining

Used extensively in high-intensity mining operations for production blasting in hard and ultra-hard rock formations. The QL Series delivers the impact resistance and penetration rates required for efficient fragmentation in granite, basalt, and other competent rocks, with the QL50 series excelling in large-diameter blast hole applications.

2. Deep Hole Drilling

Specifically engineered to maintain performance in deep hole drilling applications where energy transmission efficiency is critical. The optimized shank and spline design ensures consistent impact energy delivery even at extended depths.

3. Hard Rock Quarrying

Widely applied in quarry operations extracting granite, basalt, and other hard dimension stones. The domed button configurations provide superior wear resistance and impact strength for the most abrasive rock conditions.

4. Exploration Drilling

Employed in mineral exploration programs targeting hard rock formations. The QL Series provides the reliability and penetration performance needed to achieve target depths in challenging geological conditions.

1. Engineered for Epiroc QL Hammers

The QL Series is specifically designed to match Epiroc (Atlas Copco) QL series hammers, with precision-machined shank lengths (280mm for QL40, 240mm for QL50) and optimized spline configurations (10 splines for QL40, 12 splines for QL50) ensuring perfect compatibility and maximum energy transfer.

2. Superior Hard Rock Performance

The domed and ballistic button combinations are specifically engineered for medium-hard to ultra-hard rock formations, with domed buttons providing exceptional impact resistance and wear life while ballistic buttons enhance cutting action for faster penetration.

3. Optimized Face Designs

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

4. Extended Service Life

Manufactured from high-grade alloy steel with precision heat treatment and premium tungsten carbide buttons, the QL Series offers exceptional resistance to wear and impact, ensuring maximum service life in the most demanding drilling conditions.

5. High-Intensity Mining Compatibility

Specifically designed for high-intensity mining operations where reliability and performance are critical. The robust construction and optimized energy transfer ensure consistent performance even under extreme drilling conditions.

Q1: What makes the QL Series different from other DTH button bits?

The QL Series is specifically engineered for Epiroc QL series hammers with precision-matched shank lengths (280mm for QL40, 240mm for QL50) and optimized spline configurations, ensuring superior energy transfer and performance in medium-hard to ultra-hard rock formations including granite and basalt.

Q2: What head diameters are available in the QL Series?

The QL40 covers Φ108–130mm while the QL50 covers Φ140–178mm, providing comprehensive coverage for small-to-medium and large-diameter drilling applications in high-intensity mining and deep hole drilling operations.

Q3: What button types and face designs are available?

We offer domed and ballistic button combinations with convex, flat, and concave face designs – domed buttons provide superior impact resistance for ultra-hard rock, ballistic buttons enhance cutting action, and the face design should be selected based on your specific rock conditions.

Q4: Are QL Series bits compatible with other hammer brands?

While the QL Series is optimized for Epiroc QL series hammers, the industry-standard shank and spline configurations may offer compatibility with certain other hammers – please verify specifications with our technical team before ordering.

Q5: What is the expected service life of QL Series bits?

Service life varies depending on rock abrasiveness and drilling parameters, but the premium materials and heat treatment processes typically deliver extended wear life even in ultra-hard granite and basalt formations, with reconditioning possible through specialist service providers.

Q6: 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.

Q7: 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.

Q8: 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.