RKL4774 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4774 is part of the RKL Motor Power Cables series and features a cable construction of 4x16.0mm² plus 2x(2x1.5mm²)StC. It has a PUR jacket material, supports a power operating voltage of 600 V AC, and offers 5,000,000 bending cycles for flexibility and durability. The cable has an outer diameter of 25.5 mm with a dynamic bending radius of 7.5 times the diameter.
Internal Product Review
The RKL4774 is a robust motor power cable from the RKL series by Bosch Rexroth Indramat, offering 5,000,000 bending cycles and a PUR jacket for superior durability in dynamic applications. Its cable construction supports 600 V AC power conductors and 300 V control lines, making it suitable for demanding industrial environments. The combination of high flexibility and reliable voltage handling defines this cable as a dependable choice for motion systems.
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Product Description:
The RKL4774 power cable is produced by Bosch Rexroth Indramat within the RKL Motor Power Cables series. This flexible, multicore assembly is intended to connect Rexroth drives to synchronous or induction motors in automated production cells. It combines high-current conductors with paired control cores in a single jacket, simplifying cable routing and reducing the required panel space. The cable maintains electrical integrity during continuous movement in drag chains, supporting speed and torque control in robotic axes, gantries, and machining centers.
The cable is rated for 5 million bending cycles before conductor fatigue becomes critical. During dynamic movement, the minimum bending radius is 7.5 × D, whereas stationary installation permits a smaller radius of 5 × D. These bending limits help prevent damage to the internal copper strands. A PUR sheath prevents contaminants from adhering to the surface and protects the composite core from abrasion. The cable has an outer diameter of 25.5 mm, allowing its required space within cable carriers to be calculated accurately. The power cores support up to 600 V AC, while the integrated signal pair carries control voltages up to 300 V. This electrical separation allows the power and control conductors to operate within the same cable jacket.
The conductor set uses four 16.0 mm² power cores and two pairs of 1.5 mm² control cores. The larger conductors carry motor phase current, while the smaller paired conductors support brake-release or temperature-sensor circuits. Tinned copper strands resist corrosion, and filler cords stabilize the internal bundle during high-speed movement. In fixed routing, the insulation supports continuous operation at temperatures up to 90 °C. The cable remains functional at temperatures up to 80 °C during flexing, making it suitable for warm machine enclosures. Its mixed conductor arrangement allows motor power and auxiliary signals to share one protected cable path without requiring separate assemblies.
