RKL4639 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4639 is part of the RKL Motor Power Cables series. This cable features a PUR jacket in orange, an outer diameter of 22.2 mm, and a conductor resistance of 1.91 ohm per kilometer at 20°C. It is rated for 5 million bending cycles and can operate in temperatures from -30 to +40°C when fixed.
Internal Product Review
The RKL4639 is a robust motor power cable from Bosch Rexroth Indramat, featuring a durable PUR jacket and a striking orange color for easy identification. With a typical capacitance of 1.0 nF/m and a conductor resistance of 1.91 Ω/km at 20°C, this cable supports efficient power transmission. Its ability to withstand up to 5 million bending cycles makes it ideal for dynamic industrial environments.
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Product Description:
The Bosch Rexroth Indramat RKL4639 belongs to the RKL Motor Power Cables series and is a flexible supply cable for servo and spindle motors in automated machinery. The cable delivers three-phase power together with auxiliary control pairs, allowing power, brake, and temperature connections to share a single routed assembly. It is designed for installation in energy chains or moving machine axes where continuous motion requires stable electrical properties and a predictable mechanical service life. This arrangement reduces the number of separate cables that must pass through crowded carriers while preserving dedicated conductors for each connected circuit.
The cable has a rated endurance of 5 million bending cycles, indicating the number of chain traverses that the jacket and conductors can tolerate before fatigue is expected. Its typical mutual capacitance of 1.0 nF/m limits reactive current at drive carrier frequencies, helping maintain clean waveform edges. Direct-current resistance at 20 °C is 1.91 Ω/km, which restricts voltage drop along extended cable runs. Two shielded feedback conductors are supplemented by power-relay leads measuring 2 × 1.0 + 2 × 1.5 mm², allowing brake and temperature signals to share the same assembly. The cable has an overall diameter of 22.2 mm with a tolerance of ±1.0 mm, supporting the selection of compatible cable glands, clamps, and drag-chain compartments.
The thermoplastic elastomer sheath is colored orange (RAL 2003) for quick identification in control cabinets and along production lines. Its outer layer is made from PUR, which resists oils, coolants, and abrasion during continuous movement. When fastened in place, the cable operates within a fixed temperature range of -30 to +40 °C. During dynamic operation, the permissible temperature range narrows to -20 to +40 °C to account for the additional stress associated with repeated flexing. The storage range extends from -30 to +40 °C, permitting pre-cut cable lengths to remain in unconditioned storage areas without adversely affecting their dielectric performance.
