RKL4745 Bosch Rexroth Indramat

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The Bosch Rexroth Indramat RKL4745 belongs to the RKL Motor Power Cables series and features four power conductors of 50.0 mm² and four control conductors of 2.5 mm². The cable supports a fixed bending radius of 184 mm, a flexible bending radius of 276 mm, and has a nominal diameter of 36.8 mm. It is halogen-free with a PUR jacket and is suitable for drag chain use.

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Product Description:

The RKL4745 is a motor power cable manufactured by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It is intended to connect drive controllers to servo motors in industrial automation systems, conveying three-phase power and auxiliary control signals while tolerating continuous motion inside drag-chain assemblies found on gantries, machine tools, and packaging lines.

This cable’s mechanical profile supports tight routing in stationary sections with a minimum fixed bending radius of 184 mm, while dynamic machine axes can move it repeatedly down to a flexible radius of 276 mm without exceeding conductor stress limits. A nominal outer diameter of 36.8 mm allows compact cable trays, and the matte, adhesion-free sheath is made from PUR to resist oils and abrasion common in factory environments. Material formulation is declared Halogen-Free, so combustion by-products do not release corrosive gases. Four power conductors and four separate control conductors are embedded under the jacket, and the overall construction is approved for drag-chain use, enabling several million bending cycles during service life.

Electrical characteristics complement the mechanical design. Each copper phase presents a conductor resistance of 0.386 ohm/km at 20 °C, limiting voltage drop on long runs, while the cable’s mutual capacitance is only 1.3 nF/m, reducing reactive current drawn by pulse-width-modulated drives. Control cores are dimensioned at 2.5 mm² to carry encoder supply or brake release signals with minimal loss, and the power cores are sized at 50.0 mm² to handle high motor currents without excessive heating. Together these parameters provide predictable impedance, thermal behaviour, and EMC performance for precise motion control applications.

Bending Radius (fixed)
184 mm
Bending Radius (flexible)
276 mm
Cable Diameter (nominal)
36.8 mm
Conductor Resistance (20°c)
0.386 ohm/km
Control Conductor Size
2.5 mm²
Control Conductors
4
Discharge Capacity
1.3 nF/m
Drag Chain Use
Yes
Halogen Content
Halogen-Free
Jacket Material
PUR (adhesion-free, matte)
Power Conductor Size
50.0 mm²
Power Conductors
4

Frequently Asked Questions about RKL4745:

Q: How many power conductors are provided in the RKL4745 cable and what is their size?

A: The RKL4745 uses four power conductors, each with a size of 50.0 mm².

Q: Is the RKL4745 cable suitable for use in drag chains during operation?

A: This cable supports drag chain applications for increased flexibility in moving machinery setups.

Q: What is the nominal cable diameter of the Bosch Rexroth Indramat RKL4745?

A: The nominal diameter of the RKL4745 cable is 36.8 mm, making it suitable for heavy-duty installations.

Q: What is the minimum bending radius required for fixed installation of the RKL4745 cable?

A: The minimum permitted bending radius for fixed installation is 184 mm.

Q: What material is used for the outer jacket of the RKL4745 cable and does it contain halogen?

A: The jacket of this cable is made from PUR (adhesion-free, matte) and is halogen-free for added safety.


Internal Product Review

  • ‘‘The RKL4745 motor power cable from Bosch Rexroth Indramat stands out with its durable PUR jacket and halogen-free construction, ensuring reliability and safety in demanding environments. Designed for high-performance applications, the cable features four 50.0 mm² power conductors and is fully compatible with drag chain systems. This robust cable is ideal for installations requiring flexibility and consistent electrical performance.’’

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