RKL4744 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4744 is part of the RKL Motor Power Cables series and features a cable diameter of 30.8 mm with a PUR jacket. It is equipped with three power conductors at 35.0 mm² each, four control conductors of 1.5 mm², and is suitable for drag chain use with both static and dynamic bend radii specifications.
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Product Description:
The RKL4744 cable belongs to the RKL Motor Power Cables series manufactured by Bosch Rexroth Indramat. It is a hybrid power-and-control cable intended for connecting servo drives to motors in automated machinery. The cable delivers three-phase power while carrying auxiliary feedback or brake signals through separate control cores. Its construction supports continuous-flex applications such as cable carriers and moving gantries, where the routing path changes repeatedly during machine operation.
A power circuit built on three conductors, each with a cross-sectional area of 35.0 mm², handles the motor’s operating current with low resistive loss. The cable has an overall outside diameter of 30.8 mm, which must be considered when selecting cable glands and calculating carrier fill. Long-run voltage drop is limited by a conductor resistance of 0.554 Ω/km at 20 °C, permitting accurate torque delivery at the motor terminals. When routed in dynamic tracks, the jacket requires a minimum bend radius of 7.5 × D. This radius helps preserve the integrity of the copper strands during repeated flexing. The sheath has a high-contrast RAL 2003 (orange) color, making energized motor cables easier to identify in crowded panels and machine assemblies.
The outer sheath is made of PUR, which provides abrasion resistance, oil tolerance, and halogen-free performance for demanding production environments. Four control cores, each with a cross-sectional area of 1.5 mm², support brake release, temperature sensing, or encoder reference signals within the same routed bundle. Combining these functions in one cable reduces the number of separately routed conductors required between the drive and motor. Capacitive coupling between the phases is limited to 1.2 nF/m, supporting servo drives that monitor insulation impedance. For fixed installation, the cable requires a minimum bend radius of 5 × D, allowing tighter panel routing than dynamic installation permits. The cable is approved for drag-chain use in moving machine assemblies.
