SD Series High Air Pressure DTH Button Bit – Heavy-Duty Large Diameter First Choice, Engineered for Sandvik SD Hammers (Φ108–Φ305mm)

The SD Series High Air Pressure Down-the-Hole (DTH) Button Bit is the heavy-duty large diameter first choice for the most demanding drilling applications, specifically optimized for Sandvik SD series hammers. Engineered to balance penetration speed and service life, this series delivers exceptional performance in ultra-hard rock, deep holes, large-diameter blast holes, piling, and other heavy-duty applications.

Manufactured from premium alloy steel with precision-engineered tungsten carbide spherical buttons, the SD Series features robust construction and optimized button configurations that provide superior impact resistance and wear characteristics in the most abrasive rock conditions. The precision-machined shank and spline configurations ensure perfect compatibility with Sandvik SD series hammers, maximizing impact energy transfer to the rock face.

Available in three model families – SD4, SD6, and SD8 – covering head diameters from Φ108mm to Φ305mm, the SD Series provides comprehensive coverage for large-scale drilling operations. Whether you are drilling large-diameter blast holes in open-pit mines, deep piling holes for foundation projects, or exploration holes in ultra-hard formations, the SD Series delivers the durability and performance required for the most challenging heavy-duty applications.

1. Heavy-Duty Large Diameter Mining

The SD Series is the first choice for large-diameter blast hole drilling in open-pit mining operations, with the SD8 series delivering exceptional performance in Φ203–305mm holes for high-intensity production blasting in ultra-hard rock formations.

2. Deep Hole Drilling

Specifically engineered to maintain performance in deep hole applications where energy transmission efficiency is critical, with the heavy-duty construction and optimized shank design ensuring consistent impact energy delivery even at extended depths.

3. Piling & Foundation Engineering

Widely applied in large-diameter piling projects for bridges, high-rise buildings, and heavy infrastructure, where the SD8 series provides the durability and penetration power required for drilling through ultra-hard rock formations.

4. Ultra-Hard Rock Quarrying

Employed in quarry operations extracting the hardest rock types including granite, basalt, and quartzite, with the spherical button configurations providing superior wear resistance and impact strength for the most abrasive conditions.

5. Large-Diameter Water Well Drilling

Used for large-diameter production water wells in challenging geological conditions, where the SD6 and SD8 series deliver reliable performance and exceptional hole quality.

1. Optimized for Sandvik SD Hammers

The SD Series is specifically engineered for Sandvik SD series hammers with precision-matched shank lengths (260mm for SD4, 322mm for SD6, 321mm for SD8) and optimized 8-spline configurations, ensuring perfect compatibility and maximum energy transfer.

2. Heavy-Duty Construction

Built with premium alloy steel and precision heat treatment, the SD Series features robust construction designed to withstand the extreme forces encountered in large-diameter and deep hole drilling applications, delivering exceptional durability and service life.

3. Spherical Button Technology

The spherical button configuration provides superior impact resistance and wear characteristics in ultra-hard rock formations, with optimized gauge protection ensuring maximum utilization of each button and extended service life.

4. Convex–Concave Face Design

Available in convex, flat, concave, and innovative convex–concave face designs (SD8, Φ275–305mm), the SD Series allows operators to select the optimal face configuration for their specific rock conditions and drilling requirements.

5. Comprehensive Large Diameter Coverage

With head diameters ranging from Φ108mm to Φ305mm across three model families, the SD Series offers the most comprehensive coverage for heavy-duty large diameter drilling applications, allowing operators to standardize on a single product family for large-scale operations.

6. Balanced Performance

Specifically engineered to balance penetration speed and service life, the SD Series delivers optimal drilling efficiency while maximizing bit longevity, reducing cost per drilled meter in the most demanding applications.

Q1: What makes the SD Series the first choice for heavy-duty large diameter drilling?

The SD Series is specifically optimized for Sandvik SD series hammers with heavy-duty construction, spherical button technology, and head diameters up to Φ305mm, delivering exceptional durability and performance in ultra-hard rock, deep holes, large-diameter blast holes, and piling applications.

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

The SD4 covers Φ108–130mm, the SD6 covers Φ154–203mm, and the SD8 covers Φ203–305mm, providing comprehensive coverage from small-to-medium diameter drilling through to extra-large piling and heavy mining applications.

Q3: What button types and face designs are available?

We offer spherical buttons with convex, flat, concave, and innovative convex–concave face designs – spherical buttons provide superior impact resistance for ultra-hard rock, and the face design should be selected based on your specific application and rock conditions.

Q4: What is the difference between the SD6 and SD8 series?

The SD6 covers Φ154–203mm with a 322mm shank length and weighs 25.0–32.5 kg, while the SD8 covers Φ203–305mm with a 321mm shank length and weighs 41.3–70.5 kg – the SD8 is designed for the heaviest large-diameter applications including piling and extreme mining.

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

Service life varies depending on rock abrasiveness and drilling parameters, but the heavy-duty construction and premium spherical buttons typically deliver extended wear life even in ultra-hard rock 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.