RKL4508 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4508 is part of the RKL Motor Power Cables series and features phase conductors of 3x10.0 mm² with a PE conductor of 1x10.0 mm². This cable uses a PUR jacket material and has a cable outer diameter of 22.2 mm. It supports a static bending radius of 5xD and uses the RLK0004 motor-side connector.
Internal Product Review
The RKL4508 from Bosch Rexroth Indramat is a robust RKL Motor Power Cable designed for industrial automation, featuring 3x10.0 mm² phase conductors and a tough PUR jacket for high durability. The cable includes both RLS0721/K10 and RLK0004 connectors for secure controller and motor connections. With a dynamic bending radius of 7.5xD, this model is built for flexible installation in demanding environments.
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Product Description:
The RKL4508 cable is manufactured by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It is supplied as a finished motor power lead that connects an IndraDrive controller to a Rexroth synchronous servo motor in automated equipment. By combining power phases, protective earth, and auxiliary conductors under a single shielded jacket, the assembly simplifies cabinet wiring, guarantees dependable energy transfer on moving axes, and supports quick plug-and-play replacement during maintenance.
Inside the cable core, three phase conductors are sized at 3x10.0 mm², and a dedicated earth path uses 1x10.0 mm². Two low-current pairs for sensors or a brake are present as 2x1.0 mm² + 2x1.5 mm². The jacket diameter of 22.2 mm yields a compact yet robust bundle, while the polyurethane sheath marked PUR resists oil, coolant, and torsional fatigue. Copper cross-sections and strand class limit loop resistance to 1.91 Ω/km at 20 °C, keeping voltage drop within drive tolerances. Because the bulk cable type is INK0605, a concentric shield and drain line achieve a discharge capacitance of 1.0 nF/m, a parameter that controls switching losses at the inverter and reduces bearing currents during high-frequency PWM operation.
The assembled ends are finished with a controller-side connector RLS0721/K10 and a motor-side connector RLK0004, allowing direct coupling with standard Rexroth hardware. During continuous motion the cable must observe a dynamic bending radius of 7.5xD; when clamped in stationary trays the minimum static loop is 5xD. These limits prevent conductor fatigue and preserve shield integrity. Combined with the conductor set and controlled capacitance, the harness maintains stable power delivery to linear modules, gantry axes, and delta robots throughout high-cycle manufacturing.
