Kaishan 76mm DTH Drill Rods for Mining & Water Well

Technical Selection

Key parameters for matching this machine to your job. Send us your hole diameter, depth and rock condition and our engineers will confirm the right configuration.

Key Advantages

Applications

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Main Components

• Rod body
• Male thread (pin)
• Female thread (box)
• Upset ends
• Friction weld joint
• Internal air passage
• Thread protector
• Surface treatment

Working Principle

DTH drill rods function as the mechanical link between the drill rig and the down-the-hole hammer. The rig applies rotation, feed force, and compressed air through the rod string. The rods transmit torque to rotate the hammer and bit, and transfer feed force to maintain optimal bit loading. Simultaneously, the rods convey compressed air from the rig to the hammer, which powers the piston to deliver high-frequency impacts to the bit. The rod's internal passage allows air to flow to the bit for flushing cuttings out of the hole. The threaded connections must withstand repeated make-and-break cycles and transmit high torque without loosening. The 76mm diameter provides a balance of stiffness and weight, ensuring efficient energy transfer and minimizing hole deviation. Proper rod selection and maintenance are critical for maximizing drilling efficiency and tool life.

Detailed Features

• ▸High-grade alloy steel for strength and toughness
• ▸CNC-machined threads for precise fit
• ▸Friction welding for robust joints
• ▸Heat treatment for wear resistance
• ▸Straightness controlled for accurate drilling
• ▸Corrosion-resistant surface finish
• ▸Compatible with standard DTH hammers
• ▸Available in multiple lengths and threads

Packaging & Shipping

Kaishan 76mm DTH drill rods are packed in sturdy wooden crates or steel bundles, with thread protectors installed to prevent damage during transport. Each bundle is securely strapped and labeled for easy identification. Standard export packaging ensures safe delivery to any port worldwide. Container loading: 20ft container can hold approximately 200-300 rods depending on length. Delivery time is typically 15-30 days after order confirmation, depending on quantity and customization. Shipping ports include Shanghai, Ningbo, or as per customer request.

After-Sales Service

Kaishan offers a comprehensive after-sales service package. All drill rods come with a 6-month warranty against manufacturing defects. Our technical support team is available 24/7 to assist with product selection, troubleshooting, and maintenance advice. We provide on-site training for proper rod handling and care to maximize service life. A full range of spare parts and accessories is available for quick shipment. Our global network of distributors ensures timely local support. Customer satisfaction is our priority, and we continuously improve our products based on field feedback.

Frequently Asked Questions