RKL4705 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4705 is a power cable in the RKL Motor Power Cables series. This cable features four power conductors with a 2.5 mm² cross-section and two control pairs of 1.0 mm² each. It has a PUR jacket in RAL 2003 orange color, a minimum bend radius of 5 times the diameter when fixed, and supports up to 5,000,000 bending cycles in drag chains.
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Product Description:
The RKL4705 is a motor power cable produced by Bosch Rexroth Indramat for the RKL Motor Power Cables series. Designed for permanent installation or drag-chain motion between a servo drive and its motor, the cable carries three-phase power and auxiliary circuits through a single jacket. By combining drag-chain endurance with reliable electrical performance, it simplifies cable routing inside gantries, packaging cells, and other equipment with moving axes.
With an outer diameter of 14.8 mm, the cable fits standard energy-chain separators while leaving space for surrounding airflow. Its power element consists of four cores (3 + PE), allowing the three line phases and protective earth conductor to share the same routing and flex behavior. Each power core has a cross-sectional area of 2.5 mm², limiting voltage drop and supporting typical medium-frame servo motor currents. The copper resistance is 7.98 Ω/km, which can be used to calculate electrical losses over long cable runs. For cyclic motion, the cable withstands 5,000,000 bending cycles. The minimum bend radius is 5 × D for fixed installation and 7.5 × D during flexing, helping prevent conductor fatigue under repetitive motion. The PUR sheath resists oil and abrasion, protecting the insulation during high-speed travel.
The cable has a capacitance of 0.7 nF/m. Auxiliary circuits are supported by two 1.0 mm² balanced control pairs and four 1.0 mm² auxiliary conductors. These conductors can serve brake-release circuits, temperature sensors, or encoder power supplies without requiring a separate cable, which reduces the number of cabinet penetrations. The jacket has a RAL 2003 orange finish that makes the cable easy to identify inside machinery. Its abrasion-resistant polymer remains flexible during repeated movement in continuous-motion cable tracks. The shared jacket keeps power, grounding, and secondary circuits together while maintaining organized routing between the servo drive and motor.
