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RKL4533 Bosch Rexroth Indramat

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The Bosch Rexroth Indramat RKL4533 is a motor power cable from the RKL Motor Power Cables series with an outer diameter of 18.5 mm and a jacket made from PUR material. It features a 6.0 mm² power wire cross-section, 5 million bending cycles, and crimp pin plug connectors. The cable supports wire temperatures up to 90°C when fixed and 80°C when flexible.

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Product Description:

The RKL4533 cable is a motor power lead manufactured by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It is intended to connect servo drives to Indramat motors in automated machinery where continuous motion and high current draw require a dedicated, preassembled cable. The cable carries the three-phase supply, protective earth, and auxiliary control cores in a single jacket, allowing cabinet builders to route one harness instead of separate power and sensor lines. The protective earth conductor is color-coded green and yellow for clear identification, and factory-crimped contacts at each end maintain consistent electrical resistance and mechanical retention in dynamic cable chains.

The motor phase conductors have a cross-sectional area of 6.0 mm², which limits voltage drop during acceleration currents. Two auxiliary pairs are integrated for holding-brake or temperature-sensor circuits. The first pair uses 1.0 mm² copper conductors to minimize bulk, while the second pair uses 1.5 mm² conductors for higher load capacity. The overall bundle follows the wiring pattern 4x6.0 + (2x1.0)StC + (2x1.5)StC, so the required power and auxiliary conductors reach the motor through one molded plug. At the drive end, the connector has 3 + PE power contacts. Seven additional crimp-pin terminations carry control signals and keep high-current connections segregated from low-level circuits.

The PUR sheathing sustains flexing over 5 million carrier movements without cracking, and its matte, adhesion-free surface slides easily along guide channels. During installation, the cable can be looped in energy chains down to a radius of 7.5 × D, preserving conductor geometry and signal integrity. The cable can operate at up to +90 °C in fixed installations, while moving sections remain flexible at temperatures up to +80 °C. Its nominal diameter of 18.5 mm provides enough internal spacing for the current-carrying conductors while still fitting standard 20 mm gland plates. The polyurethane jacket also protects the conductor bundle from abrasion caused by repeated travel through cable carriers. Proper bend-radius control reduces mechanical stress on the copper strands and molded connector terminations during continuous motion.

Aux Wire Cross-section (5,6)
1.0 mm²
Aux Wire Cross-section (7,8)
1.5 mm²
Bending Cycles
5 million
Cable Construction
4x6.0 + (2x1.0)StC + (2x1.5)StC
Jacket Material
PUR (adhesion-free, matte)
Min Bend Radius (flexible)
7.5 x D
Outer Diameter
18.5 mm
Pe Conductor Color
Green/Yellow
Plug Connector Contact Type
Crimp (Pin)
Plug Connector Contacts (control)
7
Plug Connector Contacts (power)
3 + PE
Power Wire Cross-section
6.0 mm²
Wire Temperature (fixed)
+90 °C
Wire Temperature (flexible)
+80 °C

Frequently Asked Questions about RKL4533:

Q: What is the power wire cross-section size of the RKL4533 cable?

A: The RKL4533 features a power wire cross-section of 6.0 mm² for efficient current handling.

Q: What is the outer diameter of the Bosch Rexroth RKL4533 cable?

A: The outer diameter of the RKL4533 motor power cable is 18.5 mm.

Q: What type of jacket material is used on the RKL4533 cable from Bosch Rexroth?

A: The RKL4533 is designed with a PUR jacket that is adhesion-free and matte for added durability and flexibility.

Q: How many bending cycles can the RKL4533 motor power cable endure?

A: The RKL4533 can withstand up to 5 million bending cycles, supporting high-flex applications.

Q: What type of plug connector contact is featured on the RKL4533 cable?

A: The plug connectors on the RKL4533 use crimp (pin) contacts for secure electrical connections.


Internal Product Review

  • ‘‘The RKL4533 power cable from Bosch Rexroth Indramat features a durable PUR matte jacket and a power wire cross-section of 6.0 mm², ensuring robust performance in demanding environments. With a bending cycle rating of 5 million and flexible operation down to a 7.5 x D minimum bend radius, this cable is well-suited for dynamic industrial applications. Reliable contact design and sustained temperature ratings highlight its suitability for frequent motion scenarios.’’

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