RKL4786 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4786 is part of the RKL Motor Power Cables series and features a PUR jacket in RAL 2003 orange with an outer diameter of 29.8 mm. This cable supports up to 5,000,000 bending cycles, includes 4 control conductors of 1.5 mm² and 4 power conductors of 25.0 mm², and utilizes shielded control pairs.
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Product Description:
The RKL4786 motor power cable is manufactured by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It is intended for servo drive systems where the cable must flex repeatedly inside drag chains while maintaining reliable power and control transmission. Matched power, brake, and auxiliary conductors share a single sheath, simplifying cable routing between an Indramat inverter and its corresponding motor. This arrangement supports automated handling equipment, packaging lines, and other machinery that uses coordinated motion.
The cable can withstand up to 5,000,000 bending cycles without conductor fatigue when installed within the stated routing limits. Fixed installations require a minimum bend radius of 5 × D. When the cable moves, the minimum dynamic bend radius increases to 7.5 × D to prevent the jacket from kinking or placing excessive stress on the conductors. An overall diameter of 29.8 mm balances the required conductor cross section with the available space inside energy chains. The outer sheath is made from PUR, which provides abrasion resistance, oil tolerance, and low particulate shedding in high-cycle production cells. Its orange RAL 2003 finish makes the cable easier to distinguish from nearby wiring during inspection and service.
The four power conductors have a combined cross-sectional layout of 4 × 25.0 mm², allowing them to carry three-phase motor power while limiting voltage drop. Their electrical resistance is limited to 0.78 Ω/km at 20 °C. Control functions are supported by four 1.5 mm² auxiliary conductors and two shielded control pairs that carry brake or sensor signals with reduced crosstalk. The shielding helps separate low-level control signals from the higher currents passing through the power conductors. The drive cabinet end uses an angled RLS0727 (K25) connector, while the motor end uses an RLK1301 (K25) plug with matching keying. These keyed terminations support secure alignment and help prevent an incorrect connector orientation during installation.
