RKL4572 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4572 is part of the RKL Motor Power Cables series and features a cable construction of 4x16 mm² plus 2x(2x1.5 mm²) with four power conductors. It has a PUR jacket in RAL 2003 color, an outer diameter of 25.5 mm, and a conductor resistance for power of 1.21 Ω/km. The cable supports a maximum wire temperature of 90 °C when fixed and 80 °C when flexible.
Internal Product Review
The RKL4572 is a robust power cable from Bosch Rexroth Indramat, constructed with 4x16 mm² power conductors and dual shielded control pairs for reliable signal transmission. Its PUR jacket is both adhesion-free and matte, offering durability and ease of installation. With a conductor resistance of 1.21 Ω/km and a maximum fixed wire temperature of 90°C, this cable is well-suited for demanding industrial environments.
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Product Description:
The RKL4572 is a factory-assembled motor power cable manufactured by Bosch Rexroth Indramat as part of the RKL Motor Power Cables series. Designed for industrial automation lines, the cable carries drive output to synchronous or asynchronous motors while also routing temperature or brake signals through its integrated control pairs. Its single composite package simplifies routing in machine frames and reduces panel interconnect points compared with separate power and feedback lines.
For the main current path, the cable follows a 4x16 mm² + 2x(2x1.5 mm²) StC layout, providing four equally sized phase conductors and two shielded twisted pairs for sensors or brakes. Each phase conductor has a cross-section of 16.0 mm², supporting high continuous currents with limited thermal rise. The power-loop copper has a resistance of 1.21 Ω/km to minimize voltage drop over long runs. The dielectric between the conductors contributes a discharge capacitance of 1.2 nF/m, which must be considered when selecting output filters. The outer sheath is molded from PUR (adhesion-free, matte), a material chosen for abrasion resistance and oil tolerance in cable chains. Four dedicated power conductors eliminate the need for split feeds and help keep phase impedance symmetrical.
The finished cable has a diameter of 25.5 mm, so fixed installations require clearance for a minimum bend radius of 5 × D. Dynamic routing in drag chains must maintain a bend radius of 7.5 × D to prevent conductor fatigue. The cable supports a continuous operating temperature of 90 °C when clamped and 80 °C when flexed, allowing installation near motors and braking resistors without premature insulation aging. Two internal control pairs each have a 1.5 mm² cross-section for auxiliary signals. The orange RAL 2003 jacket also makes the cable easier to identify within mixed harnesses.
