RKL4569 by Bosch Rexroth Indramat

The Bosch Rexroth Indramat RKL4569 is a flexible power lead in the RKL Motor Power Cables series. Designed to link drive controllers to servo motors, the cable transfers three-phase energy while remaining pliable for moving-axis installations in machining centers, gantries, and material-handling stations. Its construction combines finely stranded copper conductors with a wear-resistant polyurethane jacket, allowing reliable power delivery inside cable chains and robotic wrists where continual motion is required.

For thermal compatibility with factory environments, the cable functions from -30 °C up to 80 °C, keeping insulation and conductor resistance within safe limits during cold starts or when routed near warm enclosures. A nominal outer diameter of 25.5 mm sets the minimum space needed through carriers and gland plates. Each power core has a cross-sectional area of 16.0 mm², supporting current levels typical of mid-frame servo drives without unacceptable voltage drop. Mechanical endurance is verified by a flex rating of 5,000,000 cycles, so conductor strands resist fatigue even under high-speed reciprocating motion. Two paired 1.5 mm² control cores housed in the same sheath provide brake release or sensor signals, simplifying harness design and reducing panel terminations.

Installation rules specify a static bend radius of 5 × D for fixed routing, while dynamic motion must stay above 7.5 × D to prevent sheath buckling. The outer layer is a PUR jacket that withstands cutting fluids and abrasion, safeguarding dielectric strength during continuous drag-chain travel. Line-to-ground capacitance of 1.2 nF/m keeps reactive current low, enabling drive amplifiers to maintain short-circuit detection accuracy over long cable runs. The cable is suitable for high-cycle pick-and-place systems and multi-axis transfer lines that require dependable, low-loss power distribution.