RKL4529 by Bosch Rexroth Indramat

The RKL4529 is a motor power cable manufactured by Bosch Rexroth Indramat as part of the RKL Motor Power Cables series. It serves as the movable link between a drive controller and a servomotor in industrial automation systems, carrying three-phase power and protective earth conductors through drag-chain guides. The cable is built for repetitive motion, tight routing spaces, and electrically noisy environments, allowing stable power delivery during continuous machine operation.

The cable is rated for 5 million flex cycles, indicating the level of repeated bending it can withstand during dynamic use. Its dynamic bend radius is 7.5 x D, so routing must stay at or above that curvature to reduce the risk of conductor damage during continuous travel. An outer diameter of 25.5 mm helps determine the space required in carrier trays and conduit runs. Each power core has a cross-section of 16.0 mm², which supports the current demand of servo motor power transmission. The DC loop resistance is 1.21 ?/km, which helps limit voltage drop and unwanted heating over longer cable lengths.

The cable also includes a separate 1.5 mm² conductor for auxiliary functions such as holding brakes, temperature monitoring, or interlock circuits. Its jacket color is RAL 2003, which makes the cable easier to identify inside machine enclosures and cable carriers. The outer sheath uses PUR, providing a matte, adhesion-free surface that resists cutting oils and moves smoothly against drag-chain links. A linear mass of 1.140 kg/m provides a clear value for moving-load calculations, while the static bend limit of five times the cable diameter supports fixed installation at cabinet exits. This combination of flexible construction, auxiliary wiring, and abrasion-resistant jacket material suits applications that require repeated motion and dependable power transmission.