RKL4733 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4733 belongs to the RKL Motor Power Cables series and features 4 power conductors of 10 mm² each, along with 2 auxiliary conductors of 1.5 mm² and 2 control conductors of 1 mm². This cable has a bending radius of 5 times the diameter when fixed and 7.5 times when flexible, and is jacketed in PUR. It supports over 5 million bending cycles and has an outer diameter of 22.2 mm.
Internal Product Review
The RKL4733 is a robust motor power cable from Bosch Rexroth Indramat, featuring 4 x 10.0 mm² power conductors and 2 x 1.5 mm² auxiliary conductors for reliable current transmission. A high flexibility rating of 5,000,000 bending cycles and a PUR matte jacket ensure excellent durability in dynamic cable track applications. This cable stands out for its combination of mechanical endurance and stable electrical properties.
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Product Description:
The RKL4733 motor power cable is manufactured by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It provides the primary power link from an IndraDrive amplifier to a compatible synchronous servo motor, supporting fast installation in automated equipment that requires coordinated motion. The cable combines power, control, and auxiliary conductors in a single assembly. This arrangement carries torque-producing current while providing circuits for brake operation, thermal sensors, and other control functions in demanding production environments.
The cable has a diameter of 22.2 mm, which determines the required gland size and affects tray spacing inside a control cabinet. Four power cores with a conductor layout of 4 × 10.0 mm² carry the three phases and protective ground, providing sufficient cross-sectional area for medium-power motor axes. The mutual capacitance is 1.0 nF/m, keeping charging currents modest when the drive operates at high pulse-width modulation frequencies. Its DC loop resistance is 1.91 Ω/km, limiting voltage drop along extended cable runs and supporting stable torque production when the motor is located some distance from the inverter.
The cable is rated for 5,000,000 bending cycles, making it suitable for cable chains and other continuously moving applications. Static installations permit a minimum bend radius of 5 × D, while moving applications require a minimum bend radius of 7.5 × D to reduce conductor fatigue. Two auxiliary conductors with a cross-sectional area of 2 × 1.5 mm² support brake release or temperature-monitoring circuits. A separate pair of 1.0 mm² control conductors allows encoder or interlock signals to share the same sheath. The harness is supplied with an attached RLS0721 controller connector, reducing the amount of field wiring required during installation. Its matte, adhesion-free PUR outer jacket resists coolants and welding spatter while moving through cable carriers. The assembly uses INK0605 bulk cable, and an RLK1401 plug provides the connection at the motor end.
