Highly Flexible Drag Chain Cable (Continuous Flex Control Cable)

Engineered for reliability in moving applications, this highly flexible drag chain cable combines outstanding mechanical durability with consistent signal integrity. It withstands over 8 million bending cycles while resisting abrasion, oil, UV radiation, and flame. Designed as a control and power connection link, it performs reliably in cable carriers where continuous, stress-free flexing, free movement, and tight bend radii are demanded—all without derating electrical performance.

Typical applications include installations in dry or damp indoor environments where free, non-stop reciprocating motion is required without forced guidance. In practice, the cable runs inside a protective drag chain (cable carrier) to prevent tangling, wear, snagging, or scattering. The combination of a polyurethane jacket and a dense overall shield allows the cable to move back and forth with the carrier, resist mechanical damage, and provide effective electromagnetic interference (EMI) protection.

It is widely used in:

• Machine tools

• CNC machining centers & vertical lathes

• Glass processing machinery

• Woodworking equipment

• Robotic arms & manipulators

• Laser and plasma cutting machines

• Engraving machines

• Door & window production lines

• Other automated industrial equipment

Cable Construction

Electrical & Mechanical Performance

• Rated voltage
  ≥0.5 mm²: 300/500 V
  <0.5 mm²: 300/300 V

• Test voltage 2,500 V

• Temperature range
  Fixed installation: -40°C to +105°C
  Flexing / moving installation: -40°C to +105°C
  (Cable remains flexible even at sub-zero temperatures.)

• Minimum bending radius
  Fixed installation: 5 × outer cable diameter
  Moving installation: 7 × outer cable diameter

• Bending life > 8 million flex cycles (under standard dynamic test conditions)

• Flame retardance In accordance with IEC 60332-1 (vertical flame propagation test)

• Oil resistance Excellent – PUR outer jacket withstands contact with mineral oils, synthetic lubricants, and water-based coolants.

• UV resistance Suitable for partial outdoor exposure without rapid degradation.

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Frequently Asked Questions (FAQ)

1. What exactly is a drag chain cable and how does it differ from a standard flexible cable?
A drag chain cable (also called a continuous flex cable) is specifically engineered to operate inside a cable carrier that constantly moves back and forth. Unlike standard flexible cords, it uses extra-fine stranded conductors, specially formulated insulation and jacket materials, and a torsion-stable lay length to withstand millions of flexing cycles without conductor breakage or corkscrewing.

2. Can I get this cable with a different shield coverage or without shielding?
Yes. The standard design includes ≥85% tinned copper braid shielding for excellent EMI protection, but we can supply an unshielded version or increase the braid coverage to over 90% depending on your signal integrity requirements. Just specify your needs in the inquiry.

3. Is the PUR jacket resistant to welding spatter or hot metal chips?
Our PUR compound offers good resistance to intermittent contact with hot particles and is far tougher than standard PVC jackets in harsh industrial settings. For extreme hot-chip conditions we can also offer a special flame-retardant TPE or TPV jacket option on a custom basis—feel free to ask our engineers.

4. What core markings are available for identification?
We supply number-coded cores as standard (white numbers on black insulation). Color-coded cores following HD 308 or customer-defined color sequences, as well as color + number combinations, are available upon request. Please clarify your preference when ordering.

5. Do you provide testing certificates and data sheets?
Absolutely. Each production batch is tested for high-voltage integrity, insulation resistance, and dimensional compliance. A standard factory test report is included. Additional documentation—such as third-party test reports, bending cycle test records, or conformance certificates to specific standards—can be supplied on request.

6. Can I order a sample first and what is the typical lead time?
Yes, we encourage engineers to evaluate a sample under real operating conditions. Sample quantities are typically shipped within 5–7 working days. Production lead time depends on order volume and customization requirements; a detailed timeline will be provided with our quotation.

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Start a conversation with our engineering team today for a competitive quote, free technical recommendation, or sample request.