BR Series Middle-Low Air Pressure DTH Bit – Small Diameter Medium-Pressure Solution for Anchoring & Micro-Piles (Φ76–Φ108mm)

The BR Series Middle-Low Air Pressure Down-the-Hole (DTH) Bit is a small diameter medium-pressure solution designed for anchoring, micro-piles, slope treatment, and other small to medium-scale projects. Engineered for compatibility with low air pressure hammers, this series delivers reliable performance with simple operation and easy maintenance.

Available in two model families – BR2 and BR3 – covering head diameters from Φ76mm to Φ108mm, the BR Series provides comprehensive coverage for small diameter drilling applications. Featuring ballistic and spherical+ballistic button combinations with flat face designs, these bits deliver effective cutting action and wear resistance for medium-hard rock formations.

Important Note: The BR Series has two interface variants internally – 4-spline and 6-spline configurations – and strict matching with your hammer is required. Please confirm your hammer's spline configuration before ordering to ensure compatibility.

1. Small-Diameter Anchoring

Widely used for rock anchoring in slope stabilization and civil engineering projects, where the compact design and reliable performance ensure efficient installation of anchor bolts in medium-hard rock formations.

2. Micro-Pile Installation

Employed in micro-pile construction for foundation support and structural reinforcement, with the BR Series delivering consistent penetration and hole quality for small-diameter piling applications.

3. Slope Treatment

Applied in slope treatment and hillside stabilization projects, where the small diameter and lightweight design facilitate handling and maneuverability on challenging terrain.

4. Small to Medium-Scale Construction Projects

Used in various construction applications including foundation grouting, light-duty drilling, and support installation where equipment requirements are modest and hole diameters are limited.

1. Small Diameter Medium-Pressure Design

Specifically engineered for small diameters and medium-pressure operation, the BR Series delivers reliable performance with simple equipment requirements and low capital investment.

2. Flat Face Design for Effective Cutting

The flat face configuration provides excellent cutting action and hole cleaning, ensuring efficient penetration in medium-hard rock formations with minimal deviation.

3. Optimized Button Configurations

Available with ballistic and spherical+ballistic button combinations, the BR Series delivers effective cutting action and wear resistance for small-diameter drilling applications.

4. Compact & Lightweight Construction

Weighing just 2.7–4.8 kg across the series, the BR bits are easy to handle, transport, and install, reducing manual handling requirements and improving job site efficiency.

5. Standardized Shank Length

With a consistent 165mm shank length across both models, the BR Series simplifies inventory management and ensures compatibility with a wide range of low-pressure hammers.

6. Low Equipment Cost

With simple construction and low manufacturing costs, the BR Series offers exceptional value for small to medium-scale projects, delivering reliable drilling without over-investment.

Q1: What is the most important consideration when ordering BR Series bits?

The BR Series has two interface variants internally – 4-spline and 6-spline configurations – so strict matching with your hammer is required; please confirm your hammer's spline configuration before ordering to ensure proper compatibility.

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

The BR2 covers Φ76–90mm while the BR3 covers Φ90–108mm, providing comprehensive coverage for small diameter anchoring, micro-piles, and slope treatment applications.

Q3: What button types and face designs are available?

We offer ballistic and spherical+ballistic button combinations with flat face designs, delivering effective cutting action and wear resistance for medium-hard rock formations in small-diameter drilling applications.

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

Service life varies depending on rock conditions and drilling parameters, but the ballistic and spherical+ballistic button configurations deliver reliable performance for small to medium-scale projects, with reconditioning possible through specialist service providers.

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 – 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.