Anyone in the automation equipment industry understands a painful truth: when a machine stops working at a customer’s site, it’s often not because the servo motor is broken, nor is the system crashed, but because the cable repeatedly bent in the cable carrier has “broken its core.”
A one-hour downtime for the customer can result in losses of tens of thousands of yuan. At this point, explaining that cables are consumables is useless; reputation is ruined.
We’ve seen far too many of these frustrating situations:
- Not just broken cores: Cables become tangled and twisted (serpentine deformation) while running in the cable carrier, the outer sheath wears down, leading to short circuits and sparks.
- Signal erratic behavior: The shielding mesh is too sparse, resulting in absurdly high interference, encoder errors, and the machine moving erratically like a drunkard.
- Environmental intolerance: Exposure to cutting fluid or low temperatures causes the outer sheath to crack like a parched earth.
What can we offer you?
- 20 million cycles tested: Our high-flexibility cable carrier series is made with Class 6 ultra-fine oxygen-free copper wire and short-pitch technology. We’ve spent years testing on our machines to ensure your products perform flawlessly at our clients’ sites.
- High-quality shielding: We maintain a minimum braiding density of 85%. While others cut corners by thinning the copper wire, we insist on a dense weave to suppress electromagnetic interference.
- PUR/Special PVC sheath: Oil-resistant, wear-resistant, and hydrolysis-resistant. Whether in an oily CNC workshop or a freezing cold storage facility, its resilience remains.
- Faster and cheaper than foreign brands: Our quality meets German standards, but our prices don’t have the exorbitant brand premium. Most importantly, we have the specifications you need in stock; for custom orders, we can produce samples in 3-5 days.
- More reliable than small workshops: Small factories only care about making the wire soft, not its tensile strength. Every batch of ours undergoes rigorous testing on our cable chain testing machines. We’re selling the “nervous system” of the machine, not just copper wire sold by weight.
If you’re currently struggling with disconnection issues, or want to reduce procurement costs but are hesitant to exchange products, you might want to try our products.
What is Flexible Control Cable?
Flexible Control Cable is designed for applications requiring frequent bending, twisting, and movement, capable of withstanding millions of dynamic bending cycles without breakage or performance degradation.
Unlike traditional fixed-installation cables, flexible control cables have a specially optimized internal structure—typically using multi-strand ultra-fine oxygen-free copper wires twisted together as the conductor, combined with high-strength insulation and an abrasion-resistant sheath.
From a cross-sectional perspective, high-quality flexible control cables typically include:
- Extremely fine flexible conductors: providing fundamental physical flexibility.
- Special insulation layers and cabling twisting methods: reducing internal friction and preventing core breakage.
- Shielding layer (optional): such as tinned copper wire braided mesh, for resisting electromagnetic interference (EMI).
- High-strength outer sheath: typically made of materials such as PVC, PUR, or TPE, providing external protection such as abrasion resistance, oil resistance, and flame retardancy.
Technical parameters
| Parameter categories | Typical parameter range/description | illustrate |
|---|---|---|
| Rated voltage | 300/300V 300 /500V 450 /750V 600V | Different standards and applications have different voltage levels. |
| Test voltage | 2000V Up to 4000V | Test voltage used to verify the insulation strength of cables. |
| Temperature range (dynamic installation) | -50°C to +90°C -40°C to +80°C -15°C to +70°C -5°C to +90°C | Different sheath materials and structural designs determine the applicable working temperature range. |
| Temperature range (fixed installation) | -50°C to +90°C -40°C to +80°C -20°C to +80°C | Cables that are not moved after installation typically have a wider temperature tolerance range. |
| Minimum bending radius (dynamic installation) | 7.5 x outer diameter Up to 12 x outer diameter Some high-performance products can reach 3 x outer diameter | This is the core indicator for measuring cable flexibility; the smaller the value, the better the flexibility. |
| Minimum bending radius (fixed installation) | 3 x outer diameter Up to 7.5 x outer diameter | |
| conductor | Bare copper wire or tinned copper wire , conforming to IEC 60228 Class 5 (fine stranded) or Class 6 (ultra-fine stranded) standards . | Class 6 conductors are thinner and more flexible than Class 5 conductors, making them suitable for higher-frequency reciprocating bending motions. |
| Sheath material | PVC , PUR TPE Special elastomers | PVC is economical; PUR is wear-resistant, oil-resistant, and has excellent weather resistance, making it suitable for complex and harsh environments; TPE combines elasticity and flexibility. |
| shield | Options include unshielded , tinned copper braided shielding (coverage typically ≥80% ), and aluminum foil shielding. | The shielding layer is used to combat electromagnetic interference (EMI) and ensure the accuracy of signal transmission . |
| Core wire marking | ≤0.5mm² uses colored wire cores; ≥0.5mm² uses black wire cores with white numerical coding . Wires with 3 or more cores usually include a yellow/green bicolor grounding wire . | It facilitates identification and wiring during installation. |
| Flame retardant properties | Compliant with IEC 60332-1-2 Standards, etc. | Ensure that the cable can self-extinguish if it catches fire, preventing the fire from spreading. |
| Oil resistance | Compliant with EN 50363-4-1 DIN VDE 0473 811-2-1 Standards, etc. | This is crucial for industrial environments exposed to oil contamination. |
Common models
| Standards system | Common models | Model number breakdown meaning | Key features and typical application scenarios |
|---|---|---|---|
| International (European Standard EN/IEC) | H05RN-F | H: Harmonized (Harmonized Standard) 05: Rated Voltage 300/500V R: Rubber Insulation (Natural/Synthetic) N: Neoprene Sheath F: Fine Stranded (Fine Stranded Flexible Conductor) | Oil-resistant, wear-resistant, weather-resistant, and bending-resistant; suitable for power and control connections in harsh environments such as engineering machinery, port equipment, and mobile robots. |
| H07RN-F | H: Harmonized 07: Rated voltage 450/750V R/N/F: Same as H05RN-F | High-voltage flexible rubber cable; suitable for high-voltage applications such as large mobile equipment and mining machinery. | |
| H05V-R | H: Harmonized ; 05: 300/500V ; V: PVC insulation; R: Flexible conductor (EN 50525 specifies Class 5 stranded) + PVC sheath. | General-purpose PVC flexible cable, low cost and good flexibility; suitable for general industrial bending applications such as internal wiring in control cabinets and connection of light equipment. | |
| LiYCY | Li: Low smoke zero halogen; Y: PE insulation; C: Copper braid shield; Y: Sheath (for halogen-free type, it is polyolefin). | Halogen-free, low-smoke, shielded, and with a flexible conductor; suitable for control signal transmission in applications such as subways, hospitals, and data centers where environmental protection, fire prevention, and interference resistance are critical. | |
| China (National Standard GB/T 9330) | KVVR | K: Control cable; V: PVC insulation; V: PVC sheath; R: Flexible conductor (stranded) | Basic flexible control cable; suitable for control circuits in general industrial equipment and automated production lines that require frequent bending. |
| KVVRP | K/V/V/R: Same as KVVR P: Copper wire braided shielding | Flexible and shielded; effectively suppresses electromagnetic interference; suitable for interference-sensitive applications such as frequency converters, servo systems, and PLC signal lines. | |
| KYJVR | K: Control cable; YJ: Cross-linked polyethylene insulation; V: PVC sheath; R: Flexible conductor. | High heat resistance (90℃) and excellent electrical performance; suitable for flexible control scenarios with high insulation requirements, such as high-temperature workshops and metallurgical equipment. | |
| ZR-KVVR | ZR: Flame retardant (usually refers to ZC grade) K/V/V/R: Same as KVVR | Low flammability upon contact with fire; suitable for control circuits in high-rise buildings, public facilities, and other applications requiring basic flame retardancy. | |
| WDZ-KYJYR | WDZ: Halogen-free, low-smoke, flame-retardant; K: Control cable; YJ: Cross-linked polyethylene insulation; Y: Polyolefin sheath (halogen-free) ; R: Flexible conductor. | Halogen-free, low-smoke, flame-retardant, high-temperature resistant, and flexible; suitable for high-end control needs in densely populated areas such as airports, subways, and schools, where fire prevention and environmental protection requirements are extremely high. |
Key Features of Flexible Control Cable:
High Flexibility: Utilizing multi-strand stranded conductors and a flexible insulation layer, it can withstand high-frequency bending and torsion. Typical lifespan exceeds 5 million bending cycles, suitable for robotic arms or cable chain systems.
Oil and Chemical Resistance: The outer sheath commonly uses PUR (polyurethane) or PVC materials, resisting oil, acids, alkalis, and solvents, suitable for factory workshops or chemical environments.
Shielding Performance: Many models are equipped with aluminum foil or braided shielding to reduce electromagnetic interference (EMI) and ensure stable signal transmission.
Wide Temperature Range: Operating temperatures typically range from -40°C to +80°C or even higher, adapting to extreme weather or high-temperature operations.
Multi-Core Design: Available in 2-core to dozens of cores, supporting various signal and power transmissions to meet complex control requirements.
Main Application Scenarios
Flexible Control Cable is widely used in industrial fields requiring dynamic power supply and signal transmission.
- Industrial Robotics Technology: Robotic arms require extremely high flexibility; flexible cables can adapt to multi-axis torsion and complex bending.
- CNC Machine Tools and Cable Carrier Systems: In the reciprocating motion components of machine tools, cables are placed in cable carriers, moving at high speeds with the equipment. Flexible cables are the only option for this type of application.
- Automated Production Lines and Warehousing Logistics: For example, Automated Guided Vehicles (AGVs) and stacker cranes in automated warehouses all rely on highly flexible cables to ensure reliable continuous operation.
How to Choose the Right Flexible Control Cable?
Assess the Motion Mode:
Is it a fixed installation? Occasional bending? Continuous high-speed reciprocating motion (cable carrier)? Or multi-axis torsion (robot)?
For cable carrier applications, a highly flexible cable marked “Suitable for cable carriers” must be selected.
Measure Environmental Risks:
Is the environment contaminated with oil or chemicals? Is there electromagnetic interference?
For oil contamination, choose a PUR-sheathed cable; for interference, choose a CY-type shielded cable.
Calculate the Bending Radius:
Measure the minimum installation space in the equipment.
Ensure the dynamic bending radius of the selected cable is ≤ the actual installation space.
Confirm electrical parameters:
Check the core wire cross-sectional area (0.75mm² to 2.5mm² is the common range) and current carrying capacity.