RKL4403 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4403 is part of the RKL Motor Power Cables series and features a 600 V voltage rating with a PUR jacket in RAL 2003 orange. This cable has an outer diameter of 18.5 mm, a conductor configuration of 4x6.0 + 2x1.0 + 2x1.5 mm², and supports a minimum bending radius of 5 times the diameter when fixed and 7.5 times when flexible.
Internal Product Review
The RKL4403 is a robust power cable from the RKL Motor Power Cables series by Bosch Rexroth Indramat, designed for dynamic industrial environments. Its halogen-free PUR jacket and suitability for drag chain applications ensure safety and flexibility during operation. With a 600 V voltage rating and low conductor resistance, this cable delivers reliable power transmission and long-term performance.
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Product Description:
The RKL4403 is a motor power cable produced by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It is intended to carry drive output to servo or spindle motors in automated machinery while maintaining reliable insulation and mechanical flexibility inside cable chains or static harnesses. By pairing with Rexroth drive systems, the cable helps maintain signal integrity and safe voltage delivery between cabinet-mounted inverters and moving machine axes, reducing installation time compared with individually terminated conductors.
The cable’s outer sheath measures 18.5 mm in diameter, a size that balances current-carrying capacity with routing space in control cabinets and energy chains. Its insulation system is rated for 600 V, allowing standard low-voltage motor feeds without requiring special overvoltage protection. When installed in a fixed run, a minimum bend of 5 x D is permissible; during continuous motion the limit changes to 7.5 x D, preventing conductor fatigue in dynamic applications. The stranded copper layout of 4x6.0 + 2x1.0 + 2x1.5 mm² separates power, brake, and feedback cores for reduced crosstalk. Line resistance is specified at 3.30 Ohm/km, so voltage drop remains low on typical machine-length runs and does not interfere with torque production at the motor terminals.
Additional characteristics support extended service life. The polyurethane jacket is colored RAL 2003 for quick identification and the material itself is PUR, giving high abrasion resistance and coolant tolerance. A discharge capacitance of 0.8 nF/m limits reactive current that could otherwise stress the drive output stage. With a dedicated power core cross section of 6.0 mm², the cable accommodates the continuous currents common to mid-frame synchronous motors. It is suitable for drag chain operation, and because the compound is halogen-free it avoids corrosive gas emission during a fire, supporting safety requirements in enclosed production areas.
