Cable failure inside drag chains is one of the top maintenance headaches on CNC machines, robotic cells, and automated production lines. Repeated bending causes conductor breakage. Hydraulic oil and coolant eat through the jacket. Every unplanned downtime costs hours of lost output. You need a control cable built to move — not just sit there.DOROU 3G 4.0mm² 3-Core Flexible Drag Chain Cable is engineered for exactly that. Made by Shanghai Derou, this oil-resistant, bend-tolerant control cable uses high-purity oxygen-free copper conductors with a specialized compound jacket. It handles millions of flex cycles in energy chains and cable carriers without cracking or losing signal integrity. Designed for dynamic motion applications where standard control cable fails in weeks.
Core Specifications
| Parameter | Detail |
|---|---|
| Model | DOROU 3G 4.0 |
| Conductor | 3 × 4.0 mm² stranded OFC copper |
| Core Count | 3-core |
| Jacket Material | Oil-resistant PVC / PUR (optional) |
| Operating Temp | -20°C to +80°C (PVC) / -40°C to +105°C (PUR) |
| Min. Bend Radius | 7.5 × cable diameter (dynamic) |
| Rated Voltage | 300/500V AC |
| Standard | VDE 0295 / IEC 60228 Class 5 |
| Application | Drag chain, cable carrier, towline system |
Why It Holds Up Where Others Don’tTested to 10 million bend cycles. The stranded OFC copper and lay-length optimized core construction absorb repeated flex stress inside energy chains. No conductor fatigue, no intermittent signal loss — even at high traverse speeds on gantry machines.Oil, coolant, and chemical resistant jacket. PUR jacket option resists hydraulic oil, cutting fluid, and common workshop solvents. PVC version handles light oil exposure. The jacket stays flexible at low temp and won’t swell or crack in oily environments typical of CNC and injection molding setups.Compact OD for tight cable carriers. The 3G 4.0mm² design keeps overall diameter under 13mm, fitting standard 15×15mm to 25×38mm drag chains without forcing. Leaves room for signal lines and hose bundles in crowded cable trays.Stable electrical performance under motion. Consistent impedance and low capacitance per core ensure reliable sensor and servo signal transmission — critical for closed-loop CNC axes and robot feedback lines that can’t afford noise or dropouts.
Typical Applications & Industries
- CNC machining centers (travel axes, tool changer lines)
- Industrial robots and robotic arms (joint cable routing)
- Injection molding machines (platen movement, ejector circuits)
- Welding equipment and plasma cutters (torch carriage feeds)
- Automated assembly lines, palletizers, conveyor systems
- Any towline or energy chain system requiring 3-core power or control
Shanghai Derou — Factory Direct, No MiddlemanDOROU cables ship from our Shanghai production facility with full batch traceability and test reports. We support custom lengths, core counts, jacket materials, and connector terminations for your specific machine build. Standard lead time: 7–12 working days for stock items.Need a cable spec for a new machine design? Send us your drag chain size, travel length, and motion profile — our engineering team will recommend the right construction and send a quote within 24 hours.Request a quote or download the full datasheet →