📦 DTH Drill Rods
Kaishan COUPLING-SLEEVES DTH Drill Rod Coupling Sleeve
Model: COUPLING-SLEEVES
Kaishan COUPLING-SLEEVES are precision-engineered coupling sleeves for DTH drill rods, designed to connect and transmit torque and impact energy in down-the-hole drilling. Manufactured from high-strength alloy steel with wear-resistant threads, they ensure secure joints, reduced downtime, and extended service life in mining, water well, and quarry applications. Compatible with common DTH rod diameters and thread types, these coupling sleeves maintain alignment under high vibration and repeated impact. Ideal for use with Kaishan and other major DTH drilling systems, they help optimize drilling efficiency and lower cost per meter. Each sleeve undergoes strict quality control for dimensional accuracy and thread integrity, ensuring reliable performance in demanding conditions. Available in various sizes and thread configurations to match specific drill rod requirements. Backed by Kaishan's global service network, these coupling sleeves are a dependable choice for professionals seeking durable, high-performance drilling tool accessories.
Best For
Technical Specifications
| Model | COUPLING-SLEEVES |
| Type | DTH Drill Rod Coupling Sleeve |
| Size | 2 3/8" - 4 1/2" (60mm - 114mm) outer diameter, various thread types |
| Application | Connecting DTH drill rods in mining, water well, quarry, construction |
| Material | High-strength alloy steel, heat-treated |
| Weight | Approx. 2.5 kg to 15 kg depending on size |
| Packing | Wooden case or pallet, anti-rust protection |
Product Details
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.
Weight
Approx. 2.5 kg to 15 kg depending on size
Model
COUPLING-SLEEVES
Type
DTH Drill Rod Coupling Sleeve
Size
2 3/8" - 4 1/2" (60mm - 114mm) outer diameter, various thread types
Application
Connecting DTH drill rods in mining, water well, quarry, construction
Material
High-strength alloy steel, heat-treated
Packing
Wooden case or pallet, anti-rust protection
Not sure this model fits? Tell us the hole diameter and depth — we will confirm the matching rig, compressor and hammer.
Check with an engineerKey Advantages
High-strength alloy steel construction for durability
Precision-machined threads for secure joint integrity
Heat-treated for optimal wear and fatigue resistance
Compatible with common DTH rod sizes and thread types
Reduces energy loss and improves drilling efficiency
Corrosion and abrasion resistant surface treatment
Applications
📍 Mining Blast Hole Drilling
Used in open-pit and underground mines to connect DTH drill rods for blast hole drilling.
Solution: Kaishan coupling sleeves ensure reliable joints under high impact, reducing downtime and improving hole accuracy.
📍 Water Well Drilling
Essential for deep water well boreholes where rod connections must withstand continuous vibration.
Solution: Precision threads and heat-treated steel provide secure coupling, minimizing risk of joint failure and extending rod life.
📍 Quarry and Construction
Ideal for drilling anchor holes, foundation piles, and rock bolts in quarry and construction sites.
Solution: Durable coupling sleeves maintain alignment and torque transmission, enhancing drilling efficiency in abrasive conditions.
📍 Geothermal and Exploration
Suitable for geothermal drilling and mineral exploration where reliable rod connections are critical.
Solution: Kaishan coupling sleeves offer consistent performance, reducing operational costs and ensuring sample integrity.
Accessories Series Models
Compare specifications across the series to find the right model.
| ☑ | Model | Model | Type | Size | Application | Material | Inquire |
|---|---|---|---|---|---|---|---|
| COUPLING-SLEEVESThis model | COUPLING-SLEEVES | DTH Drill Rod Coupling Sleeve | 2 3/8" - 4 1/2" (60mm - 114mm) outer diameter, various thread types | Connecting DTH drill rods in mining, water well, quarry, construction | High-strength alloy steel, heat-treated | Get a Quote | |
| SHANK-ADAPTERS | SHANK-ADAPTERS | DTH Drill Rod Adapter | 2"-8" (51mm-203mm) or as per hammer shank | Mining, water well, quarry, construction DTH drilling | High-strength alloy steel, heat-treated | Get a Quote |
Compare 2–3 models? Tick the boxes and send them together — we will quote each one for you.
Tip: select multiple models and click “Inquire All” — the selected models are added to the quote form automatically, so you get a faster quotation.
Not sure which model fits your project? Send us your working pressure and air demand — our engineers will recommend the right one.
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.
Frequently Asked Questions
What is the purpose of a coupling sleeve in DTH drilling?+
A coupling sleeve connects two DTH drill rods, transmitting torque and impact energy while maintaining alignment and protecting rod threads.
Are Kaishan coupling sleeves compatible with other brands of DTH rods?+
Yes, Kaishan coupling sleeves are designed to match common industry thread types and sizes, making them compatible with many major brands.
What material are these coupling sleeves made of?+
They are made from high-strength alloy steel, heat-treated for optimal wear resistance and toughness.
How do I choose the correct coupling sleeve for my drill rod?+
You need to match the thread type, diameter, and rod size. Consult our technical team for assistance.
What is the warranty period for Kaishan coupling sleeves?+
We offer a 12-month warranty against manufacturing defects under normal use.
Can I get customized sizes or thread types?+
Yes, we can produce custom coupling sleeves based on your specifications. Please contact us for details.
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Where This Machine Is Used
Is This Rig Right for My Project?
Answer seven questions about your hole, depth and rock — get a matched rig, compressor, hammer, bit and rod.
Need Technical Support?
Request information and get a quote from our engineers.
Recommended System
Rig + air compressor + drilling tools matched to your project. Get pre-matching advice from our engineers.
Recommended Equipment Configuration
Matched from real machine parameters — rig, compressor, hammer, bit and rod working as one system.
KAISHAN KL511
- Hole range
- 64–127
- Drilling depth
- 25 m
Why matched
Parameter-matched to the machine on this page.
K10
- Hole range
- 254–311
- Air flow
- 22–65 m³/min
- Working pressure
- 10+ bar
- Bit shank
- K10**
Why matched
Hole range 254–311 mm covers your requirement ?–? mm.
K10
- Hole range
- 275–350
- Pressure class
- 高风压 (High pressure)
Why matched
Hole range 275–350 mm covers your requirement ?–? mm.
System requirement: 10 bar / 65 m³/min · ?–? mm
