RKL4457 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4457 is part of the RKL Motor Power Cables series and has a cable diameter of 29.8 mm. It features a PUR jacket that is adhesion-free and matte, with a power wire cross-section of 25.0 mm² and control wire cross-section of 1.5 mm². The cable supports drag chain use with up to 5,000,000 bending cycles and a maximum travel velocity of 5 m/s.
Internal Product Review
The RKL4457 is a Bosch Rexroth Indramat motor power cable designed for drag chain use and rated for 5,000,000 bending cycles, ensuring durability in dynamic applications. Its PUR jacket is adhesion-free and matte, offering robust protection against mechanical stress. This cable stands out for long service life in demanding motion systems.
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Product Description:
The RKL4457 is a motor power cable manufactured by Bosch Rexroth Indramat for the RKL Motor Power Cables series. Designed to connect servo drives to synchronous or induction motors in automated machinery, the assembly transmits three-phase power and auxiliary control signals while tolerating continuous movement inside energy chains. Its construction supports dynamic routing on gantries, pick-and-place axes, and other applications where the cable bends with each machine cycle.
Its copper power cores have a cross-sectional area of 25.0 mm², providing ample current-carrying capacity for medium-to-large servo motors. The direct-current resistance of those conductors is limited to 0.78 Ω/km, which minimizes voltage drop over long machine runs. The overall cable diameter is limited to 29.8 mm, so it fits standard drag-chain dividers without crowding adjacent hoses. Parallel to the power cores, the design includes four signal leads, each with a cross-sectional area of 1.5 mm²; these auxiliary wires supply motor brakes or temperature sensors without separate harnesses. Mechanical durability is reflected by a service life of 5,000,000 bending cycles, supporting high-duty-cycle robots and transfer lines.
Electrical behavior is optimized for drive performance through a line-to-line discharge capacitance of 1.1 nF/m, a value low enough to keep common-mode currents within the limits of most inverter filters. The cable is specifically approved for drag-chain use, and its construction supports linear travel speeds up to 5 m/s without corkscrewing or jacket rupture. An abrasion-resistant PUR (adhesion-free, matte) outer sheath resists cutting oils and weld spatter while sliding smoothly inside cable carriers. The durable sheath also protects the conductors during repeated movement in packaging lines, machining centers, and other automated systems.
