In the production of overhead transmission conductors and specialty cables, achieving consistent lay length, excellent roundness, and stress-free wire properties is critical to long-term performance and reliability. Traditional tubular or planetary stranders often introduce torsional stress into individual wires during the stranding process, which can negatively affect conductor flexibility, fatigue resistance, and electrical characteristics.
The RLB Cage Type Stranding Machine (Models 500 and 630) addresses these challenges through its advanced 100% back-twist design. By maintaining bobbin orientation throughout the rotation cycle, this machine completely eliminates internal torsional stress in the wires. The result is a high-quality stranded conductor with superior mechanical and electrical properties.
This stranding solution is particularly well-suited for manufacturers in Saudi Arabia and the GCC producing ACSR (Aluminum Conductor Steel Reinforced), AAAC, bare copper and aluminum conductors, OPGW (Optical Ground Wire), and multi-core control and instrumentation cables. With flexible configurations from 6B to 24B and robust engineering, it supports both high-volume standard production and specialized cable requirements.
Core Technology & Engineering Advantages
True 100% Back-Twist Stranding Technology
The defining feature of this cage-type strander is its ability to perform genuine 100% back-twist stranding. Unlike conventional stranders that apply twist to individual wires, the cage design keeps each bobbin level during rotation. This eliminates torsional stress within the wires, resulting in conductors with improved flexibility, better fatigue resistance, superior roundness, and enhanced long-term electrical performance — particularly important for overhead lines subjected to wind, ice, and thermal cycling.
Precision Constant Tension Control System
The machine is equipped with magnetic hysteresis tension controllers combined with automatic bobbin diameter detection. Real-time data is fed to the PLC, enabling automatic tension compensation from full to empty bobbin. This ensures highly stable tension throughout the entire production run, significantly reducing wire breakage, minimizing scrap, and improving overall conductor quality.
Advanced Drive System and Full-Line Synchronization
Available with either a DC main motor with ground shaft transmission or individual AC servo motors for each cage section. The intelligent MMI + PLC control system allows precise pre-setting of stranding pitch, stranding direction, and automatic tension compensation. Full synchronization with the dual-wheel capstan and take-up unit ensures smooth, stable operation even at high speeds.
Flexible Configuration and Heavy-Duty Design
The machine supports configurations from 6B to 24B, with options for additional filling devices. It accommodates large payoff reels (PN500/PND500) and take-up reels up to PN2500, with a maximum stranded conductor outer diameter of up to Φ50 mm. Bobbin handling can be performed using loading cranes or automatic loading cars, improving safety and reducing changeover time.
High Productivity with Low Maintenance
Stepless lay length adjustment, robust mechanical construction, and seamless integration with downstream equipment (such as filling, taping, or armoring lines) enable efficient multi-layer cable production. The design prioritizes reliability and ease of maintenance for continuous 24/7 operation.
Technical Specifications
| Model | Single Wire Diameter (mm) | Max. Stranded Conductor OD (mm) | Max. Rotating Speed (rpm) | Max. Pulling Speed (m/min) | Payoff Reel in Cage | Center Payoff Reel | Take-up Reel |
|---|
| 500 | Copper: Φ1.5–3.0 Aluminum: Φ1.8–4.0 Insulated: Φ3.0–8.0 | Φ45 | 6B: 100 12B: 100 18B: 70 24B: 62 | 51 | PN500/PND500 | PN800/PN1600 | PN1600/PN2500 |
| 630 | Copper: Φ1.5–5.0 Aluminum: Φ1.8–5.0 Insulated: Φ3.0–10.0 | Φ50 | 6B: 70 12B: 70 18B: 62 24B: 50 | 42 | PN500/PND500 | PN800/PN1600 | PN1600/PN2500 |
Central height: 1000 mm. Stranding lay length is step-less and fully adjustable. Custom configurations available.
Primary Applications
- Overhead Transmission Conductors: ACSR, AAAC, and aluminum clad steel conductors for power grid projects
- Optical Ground Wire (OPGW): Composite overhead ground wires combining lightning protection and fiber optic communication
- Bare Conductors: High-quality bare copper and aluminum conductors for power cables and distribution lines
- Multi-Core Control Cables: 19-core and 37-core instrumentation and control cables
- Specialty Stranded Products: Steel wire armoring and other custom stranded constructions
Why Choose Our Cage Type Stranding Machine?
- Superior Conductor Quality: True 100% back-twist technology produces stress-free conductors with excellent roundness, flexibility, and electrical performance.
- Stable & Efficient Production: Advanced tension control and full-line synchronization deliver consistent quality with reduced scrap and downtime.
- Flexible & Scalable: Multiple cage configurations (6B–24B) and strong integration capability with downstream equipment.
- Robust & Reliable: Heavy-duty construction designed for continuous high-volume operation with low maintenance requirements.
- Local Expertise & Support: Full turnkey solutions, installation, operator training (English/Arabic), and long-term technical support with spare parts availability in Saudi Arabia.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of 100% back-twist stranding compared to other technologies?
True 100% back-twist eliminates torsional stress in individual wires. This results in conductors with better flexibility, improved fatigue resistance, superior roundness, and enhanced long-term electrical and mechanical performance — especially valuable for overhead lines exposed to environmental stress.
Q2: Can this machine produce both overhead conductors and control cables?
Yes. It is highly versatile and suitable for ACSR, bare conductors, OPGW, and multi-core control cables up to 37 cores.
Q3: How does the tension control system work?
The machine uses magnetic hysteresis tension controllers with automatic bobbin diameter detection. Tension is continuously monitored and adjusted in real time by the PLC, maintaining stable tension from full to empty bobbin.
Q4: What configurations are available?
Standard configurations include 6B, 12B, 18B, and 24B. Additional filling devices and different drive systems (ground shaft or individual AC servo motors) are available.
Q5: What is the maximum conductor size this machine can produce?
Up to Φ50 mm outer diameter, depending on the model and configuration.
Q6: Do you provide installation, training, and after-sales support in Saudi Arabia?
Yes. We offer complete turnkey installation, commissioning, operator training, 24/7 remote diagnostics, and local spare parts support.
Inquiry Now
Contact our technical team today. Within 48 hours we will provide a detailed configuration proposal, ROI calculation, layout drawings, and reference cases from similar projects in Saudi Arabia and the GCC.
Ready to upgrade your stranding capabilities with true 100% back-twist technology and reliable performance? Inquiry Now — Let us deliver the professional Cage Type Stranding Machine that supports your production goals in Saudi Arabia and the GCC.
Cage Type Stranding Machine – Reliable Cable Machinery
High-performance Cage Type Stranding Machine with 100% back-twist technology. Ideal for ACSR, aluminum clad steel, bare copper/aluminum conductors, OPGW, and multi-core control cables (up to 37 cores). Models 500 & 630 with flexible 6B–24B configurations. Superior roundness, stable tension, and high productivity for Saudi Arabia and GCC cable manufacturers. Inquiry Now.
Product SKU:
Stranding Machine 500
Product Brand:
Reliable Machinery
Product Currency:
USD
Product Price:
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Product In-Stock:
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