RKL4751 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4751 is part of the RKL Motor Power Cables series and features a cable construction of 4x35.0 plus 2x(2x1.5) mm² with a jacket made from PUR. This cable supports an operating voltage of 600 V AC, has an overall diameter of 30.8 mm, and allows for ambient temperatures from -30 to +40 °C for fixed installation and -20 to +40 °C for flexible installation.
Internal Product Review
The RKL4751 is a robust motor power cable from Bosch Rexroth Indramat, featuring PUR jacket material and a cable construction of 4x35.0 + 2x(2x1.5) mm² for reliable power transmission. It supports operating voltages up to 600 V AC and offers a dynamic bending radius of 7.5xD, making it suitable for demanding industrial environments. The cable is an excellent choice for applications requiring durability and flexibility.
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Product Description:
The RKL4751 is a motor power cable manufactured by Bosch Rexroth Indramat for the RKL Motor Power Cables series. It serves as the primary power link between a drive controller and an induction or synchronous motor in automated machinery, carrying three-phase energy together with auxiliary conductors for temperature sensors or brake circuits. Preassembled on the controller side and left open on the motor end, the cable reduces installation work inside cabinets and along moving axes while maintaining the electrical integrity required in industrial automation.
The cable has an operating limit of 600 V AC, allowing it to connect directly to medium-power inverters without additional insulation measures. Current is distributed through a stranded copper conductor layout of 4 × 35.0 mm² + 2 × (2 × 1.5 mm²); the four 35.0 mm² cores carry motor phase power, while the paired 1.5 mm² conductors support sensors or brakes. A PUR sheath made from thermoplastic polyurethane protects the assembly against oil, coolant, and abrasion encountered on production lines. Space inside drag chains remains manageable because the cable has an overall diameter of 30.8 mm. On the converter side, termination with an RLS0724 (K35) circular connector eliminates field crimping and provides consistent contact geometry for compatible Rexroth power modules.
The cable supports a dynamic bending radius of 7.5 × D for continuous movement in cable tracks, while a static bending radius of 5 × D applies to fixed routing within panels. The jacket remains flexible from -20 °C to +40 °C during moving operation. Permanently installed sections can operate within a temperature range of -30 °C to +40 °C, allowing the cable to function in unheated industrial facilities. At the motor end, the conductors terminate inside the RLK1401 terminal box, which accommodates the appropriate gland size and strain-relief arrangement for compatible Rexroth compact motors.
