In the production of power cables and overhead conductors, achieving consistent lay length, excellent compaction, and stress-free wire properties is essential for both electrical performance and long-term mechanical reliability.
The RLB Tubular Stranding Machine (also known as tubular type stranding machine or tubular strander) is a heavy-duty, high-speed solution engineered for precision stranding of 7-wire, 12-wire, and 19-wire round or sector-shaped copper and aluminum conductors, as well as galvanized steel wires.
Featuring true 100% back-twist technology within a rigid rotating seamless steel tube supported by large precision bearings and automatic lubrication systems, this machine delivers silent, vibration-free operation at speeds up to 1200 rpm. It produces conductors with superior flexibility, uniform lay length, tight compaction, and excellent electrical properties — making it a preferred choice for cable manufacturers in Saudi Arabia and the GCC.
Technological Process For Tubular Stranding Machine
Individual wires from pay-off drums (single or batch loading) → Enter the seamless steel tubular cage → 100% back-twist stranding at high rotor speed → Constant tension control via band-type or hysteresis brakes → Independent servo-driven pulling capstan → Finished high-quality stranded conductor ready for insulation, compaction, or armoring.
The tubular design provides a smooth wire path, perfect mechanical and electrical synchronization, and low-noise operation, enabling reliable continuous 24/7 production.
Core Technical Advantages & Operational Excellence
True 100% Back-Twist Technology The tubular cage maintains bobbin orientation during high-speed rotation, completely eliminating internal torsional stress in the wires. This results in conductors with superior flexibility, excellent electrical performance, and enhanced long-term fatigue resistance — a significant advantage over non-back-twist or planetary stranders.
High-Speed Rigid Rotating Tube The seamless steel tube is supported by large heavy-duty precision bearings with an automatic pump lubrication and cooling system. This ensures stable, low-noise, and vibration-free operation even at rotor speeds up to 1200 rpm, supporting high-volume production with minimal maintenance.
Precise & Stable Tension Control Band-type brakes or optional German hysteresis brakes with electromagnetic compensation maintain constant wire tension from full to empty bobbin. This reduces wire breakage, minimizes scrap, and ensures consistent lay length and conductor quality throughout the production run.
Independent Servo Drive & Intelligent Control The main rotor, pulling capstan, and take-up unit are driven independently by servo motors. The advanced HMI + PLC control system allows easy pre-setting of stranding pitch, automatic tension compensation, and full-line synchronization with real-time monitoring.
Heavy-Duty Construction & Safety Features Designed for continuous 24/7 operation, the machine handles copper and aluminum wires from 0.8 mm to 5.0 mm as well as steel wires. Safety features include wire-break detection and door-open stoppage for operator protection.
Compared with planetary or drum-type stranders, the tubular design generally offers higher output, lower scrap rates, better compaction, quieter operation, and reduced maintenance requirements.
Technical Specifications
| Model | Configuration | Pay-Off Drum (mm) | Take-Up Drum (mm) | Copper Wire (mm) | Aluminum Wire (mm) | Rotor Speed (rpm) | Line Speed (m/min) | Main Motor Power (kW) |
|---|
| RLB-50 | 7B / 12B | 500 | 1250 | 0.8–3.2 | 1.2–4.0 | 1200 / 850 | 120 | 75 / 130 |
| RLB-56 | 7B / 12B | 560 | 1600 | 1.0–3.6 | 1.4–4.5 | 1000 | 120 | 75 |
| RLB-63 | 7B / 12B | 630 | 1800 | 1.2–4.0 | 1.6–5.0 | 900 | 120 | 95 |
Custom configurations and higher-capacity models available upon request.
Primary Applications
- Power Cables: 7/12/19-wire stranded copper or aluminum conductors for low- and medium-voltage cables
- Overhead Conductors: AAC, AAAC, ACSR, and steel-cored aluminum conductors
- Steel Wire Stranding: Galvanized steel strands for ACSR cores and guy wires
- Specialty Conductors: Compressed or sector-shaped conductors for high-current applications
- Optional integration with filling and taping devices for complete multi-layer cable production lines
Why Choose Our Tubular Stranding Machine?
- Superior Conductor Quality: True 100% back-twist technology delivers stress-free wires with excellent flexibility and electrical performance.
- High Productivity & Low Noise: Stable high-speed operation up to 1200 rpm with minimal vibration and maintenance.
- Reliable Tension Control: Advanced braking systems ensure consistent quality from full to empty bobbin.
- Vision 2030 Ready: High-efficiency, low-maintenance technology supporting local cable manufacturing and power infrastructure development in Saudi Arabia and the GCC.
- Full Local Support: Turnkey installation, operator training, remote diagnostics, and spare parts availability in the region.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of tubular stranding compared to planetary stranding?
The tubular design with true 100% back-twist provides higher speed, lower noise and vibration, better compaction, and significantly reduced maintenance — ideal for high-volume production of quality conductors.
Q2: Can this machine handle steel wire stranding?
Yes. It is fully suitable for galvanized steel wire stranding and ACSR core production in addition to copper and aluminum conductors.
Q3: How is wire tension controlled?
The machine uses band-type brakes or optional German hysteresis brakes with electromagnetic compensation to maintain constant tension from full to empty bobbin.
Q4: Is the operation automated?
Yes. Independent servo drives with HMI + PLC control allow easy pre-setting of stranding pitch, automatic synchronization, and real-time monitoring.
Q5: Can it be integrated into a complete production line?
Yes. We provide full turnkey solutions including pay-off, stranding, optional filling/taping, and take-up systems.
Q6: Do you provide installation and 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 GCC projects.
Ready to upgrade your stranding production with high-speed, low-noise tubular stranding technology? Inquiry Now — Let us deliver the reliable Tubular Stranding Machine that powers your cable manufacturing success in Saudi Arabia and the GCC.
Tubular Stranding Machine
High-speed Tubular Stranding Machine with 100% back-twist technology for 7/12/19 wire copper, aluminum and steel conductors. Rotor speed up to 1200 rpm, constant tension control, HMI+PLC automation.
Product SKU: TUBULAR-50 / TUBULAR-63
Product Brand: Reliable Machinery
Product Currency: USD
Product Price: Contact for Quote
Product In-Stock: InStock
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