High-flexible drag chain cable models and specifications are typically indicated by a combination of letters, with different letters corresponding to the cable's structural characteristics and functional design. The following are the main models, their meanings, and applications:
Core Models and Letter Meanings
TRVV
Construction: Copper core, nitrile polyvinyl chloride (PVC) insulation, and nitrile polyvinyl chloride (PVC) jacket
Letter Meanings: T (drag chain cable), R (flexible cable), V (PVC insulation), V (PVC jacket)
Applications: Suitable for dry or humid indoor environments, commonly used in applications requiring frequent bending, such as CNC machine tools and logistics conveying systems.
TRVVP
Construction: TRVV cable with an additional tinned copper wire braided shield
Letter Meaning: P (shielded)
Applications: Applications requiring electromagnetic interference (EMC) resistance, such as servo systems and automated production lines.
TRVVSP
Construction: Twisted pair core design + overall shield (twisted pair shield)
Letter Meaning: S (twisted pair), P (shielded)
Application: Signal transmission in high-electromagnetic interference environments, such as encoder and sensor connections.
Technical Parameters and Design Features
Conductor: Multiple strands of ultra-fine oxygen-free copper wire (diameter 0.1 ± 0.004 mm) for enhanced flexibility.
Jacket Material: High-pressure molded PVC or elastomer (such as TPE or PUR) for wear, oil, and flex resistance.
Flexibility: Minimum bend radius is 4 times the cable diameter when fixed and 7.5 times when moving; flex cycle life ≥ 5 million cycles.
Applicable Environment: Moving speed ≤ 3 m/s, reciprocating frequency ≤ 30 cycles/minute, temperature range -30°C to +70°C (fixed) or -15°C to +70°C (moving). Selection Recommendations
If shielding is not required: TRVV is preferred, as it is economical and practical.
If interference resistance is required: Select TRVVP or TRVVSP. Whether a twisted pair structure is required depends on the signal type (single-ended/differential).
For extreme environments: Consider the outer sheath material (such as improved materials that are oil-resistant and UV-resistant).
