RKL4412 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4412 is part of the RKL Motor Power Cables series and features a PUR jacket in RAL 2003 orange. Its core configuration includes 4x4.0 mm², 2x1.0 mm², and 2x1.5 mm² conductors, with a cable outside diameter of 17.0 mm. The cable is drag chain compatible, supports up to 5,000,000 bending cycles, and uses ring terminals for motor-end termination.
Internal Product Review
The RKL4412 from Bosch Rexroth Indramat is a robust motor power cable designed for dynamic industrial environments, featuring a highly flexible PUR jacket and drag chain compatibility. With a rated bending cycle of 5,000,000 and a core configuration of 4x4.0 mm² plus auxiliary conductors, this cable is built for durability and efficient power transmission. Its reliability stands out for demanding automation applications.
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Product Description:
The RKL4412 motor supply cable is produced by Bosch Rexroth Indramat for the RKL Motor Power Cables series. It serves as the primary conductor set between a Rexroth drive controller and the associated rotary motor, carrying stator power and auxiliary brake leads in automated machinery. The cable is engineered for continuous motion in energy-chain assemblies, so it maintains low voltage drop and resists mechanical fatigue in packaging lines, pick-and-place robots, and other high-cycle industrial automation axes.
The mechanical endurance rating is 5,000,000 cycles, indicating the number of flexing events that the jacket and conductors can withstand under established chain conditions. When the cable moves, a minimum dynamic bend radius of 7.5 × D helps prevent copper strand migration and protects the insulation from mechanical stress, while fixed routing permits a tighter radius of five cable diameters. The cable has an outside diameter of 17.0 ± 0.5 mm, and this controlled tolerance simplifies cable-gland sizing. Line-to-shield capacitance remains at 0.8 nF/m, limiting reactive current during long cable runs. The conductor arrangement of 4 × 4.0 mm² + 2 × 1.0 mm² + 2 × 1.5 mm² separates the power, brake, and protective-earth conductors to support consistent electrical performance.
Low-loss power delivery is supported by a DC loop resistance of 4.95 Ω/km, so heat buildup remains moderate at nominal servo currents. The cable has a drag-chain-compatible construction with a pressure-extruded inner filler that resists axial compression during rapid acceleration. For resistance to chemicals and coolants, the outer jacket is made from PUR with an adhesion-free, matte finish. This jacket can be wiped clean and helps prevent sticking or slipping irregularly inside the guide track. At the motor end, factory-crimped ring terminals (AEH/RKS) eliminate the need for field soldering and support consistent tightening on the terminal studs. The terminated motor end reduces the amount of cable preparation required during installation while preserving secure electrical contact in moving-axis applications.
