RKL4578 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4578 is part of the RKL Motor Power Cables series and features a power cable cross-section of 16.0 mm² with total shield protection. This cable supports 5,000,000 bending cycles and is drag chain suitable, with a maximum current rating of 71.3 A at 40°C. It has a PUR outer jacket in orange, a cable gland thread of M40 x 1.5, and a maximum conductor temperature of 80°C.
Internal Product Review
The RKL4578 motor power cable from Bosch Rexroth Indramat stands out in dynamic applications, offering drag chain suitability and an impressive bending cycle rating of 5,000,000. With a robust 71.3 A current rating and durable PUR outer jacket, this cable is engineered for high-performance reliability. Total shielding further ensures dependable signal integrity in demanding environments.
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Product Description:
The RKL4578 motor power cable is produced by Bosch Rexroth Indramat within the RKL Motor Power Cables series. Designed for drive-to-motor connections in automated machinery, the assembly routes three-phase power along with auxiliary control cores to moving servo axes. Its design supports continuous flexing inside cable chains, allowing decentralized inverters to energize linear slides, gantries, and articulated robot joints without signal loss or premature conductor fatigue. By maintaining stable electrical characteristics during motion, the cable supports axis accuracy and throughput in packaging lines, pick-and-place stations, and material-handling systems.
The cable has a current capacity of 71.3 A at 40 °C, allowing inverters near 30 kW to operate without placing excessive stress on the conductors. This load is carried by a copper core with a cross-sectional area of 16.0 mm², while two twisted pairs measuring 2 × (2 × 1.5) mm² carry sensor or brake signals. A molded M40 × 1.5 metric gland provides a compatible connection to motor housings. The cable has an outer diameter of 25.5 mm, which must be considered when determining tray spacing and carrier clearance. A fixed bend limit of 5 × D protects the strands when the cable is clamped in a stationary installation. The orange RAL 2003 jacket improves visibility, while an 80 °C conductor temperature limit and drag-chain approval help establish suitable fuse sizes and operating cycle rates.
For moving axes, the cable permits a dynamic bend radius of 7.5 × D and is rated for 5,000,000 reciprocating cycles in drag-chain applications. A PUR outer jacket resists coolants, welding spatter, and abrasion, helping the cable retain its dielectric integrity over long service intervals. Inside the cable, a total shield made from tinned-copper braid and aluminum laminate surrounds every conductor set. This shielding reduces electromagnetic emissions and protects nearby encoder feedback lines from electrical interference. The conductor arrangement separates the high-current motor cores from the smaller auxiliary pairs, helping preserve control-signal quality during rapid changes in motor load. These features are suited to repeated movement in carriers used on automated gantries, robotic joints, and other servo-driven equipment.
