أكمام التوصيل

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

Accessories Series Models

Compare specifications across the series to find the right model.

Tip: select multiple models and click “Inquire All” — the selected models are added to the quote form automatically, so you get a faster quotation.

Main Components

• Alloy steel body
• Precision-cut internal threads
• External wear-resistant surface
• Heat-treated zones
• Thread relief grooves
• Chamfered ends
• Identification markings
• Protective coating

Working Principle

Coupling sleeves for DTH drill rods function as the mechanical link between adjacent rods in a drill string. During drilling, the top hammer or DTH hammer generates impact energy and rotation, which are transmitted through the drill rods to the bit. The coupling sleeve, threaded onto the rod ends, ensures a rigid, concentric connection that efficiently transfers axial impact forces and torque while maintaining alignment. Its design must withstand high cyclic stresses, vibration, and abrasive environments. The threads are engineered to distribute load evenly, preventing loosening or fatigue failure. Additionally, the sleeve protects the rod threads from damage and wear, extending the life of the entire drill string. Proper selection of material and heat treatment is crucial to resist galling, corrosion, and impact wear, ensuring reliable performance in demanding drilling operations.

Detailed Features

• ▸High tensile strength for heavy-duty drilling
• ▸Precise thread geometry ensures easy make-up and break-out
• ▸Heat treatment optimizes hardness and toughness
• ▸Resistant to galling and thread wear
• ▸Compatible with Kaishan and other DTH rods
• ▸Available in various sizes and thread types
• ▸Strict quality control for dimensional accuracy
• ▸Cost-effective replacement extends drill string life

Packaging & Shipping

Kaishan COUPLING-SLEEVES are packed in sturdy wooden cases or pallets, with each sleeve protected by anti-rust oil and wrapped in moisture-barrier material. Customized packaging is available for bulk orders. Standard export packing ensures safe transport by sea or air. Container load quantities depend on size; typically 20-24 tons per 20ft container. Delivery time is 15-30 days after order confirmation, depending on quantity. Ports of shipment include Shanghai, Ningbo, or as per customer request. Tracking and documentation are provided for smooth customs clearance.

After-Sales Service

Kaishan offers a 12-month warranty against manufacturing defects for COUPLING-SLEEVES. Our global service network provides 24-hour technical support and quick response to inquiries. We offer training for proper installation and maintenance to maximize product life. A full range of spare parts is available for immediate shipment. Our engineers can assist with selection and compatibility to ensure optimal performance. Customers benefit from our commitment to after-sales support, including troubleshooting and replacement services.