Description

The REXROTH MKD071B-035-KG0-KN is a high-performance permanent magnet synchronous servo motor from Bosch Rexroth’s IndraDyn S series, designed for demanding motion control applications in industrial automation, machine tools, robotics, and packaging systems. As part of the modular MKD (Medium Compact Dynamic) family, this motor delivers exceptional torque density, dynamic response, and positioning accuracy when paired with Rexroth’s IndraDrive servo amplifiers.

Model code breakdown:

• MKD071B: Frame size 071, B-length (medium stack length)

• 035: Rated power ≈ 3.5 kW

• KG0: Natural convection cooling (no fan), smooth shaft end

• KN: Single-turn incremental encoder (2048 pulses per revolution), no brake

Engineered for continuous operation in harsh industrial environments, the MKD071B-035-KG0-KN features an IP65-rated housing (dust-tight and protected against water jets), robust bearings for high radial/axial loads, and a thermally optimized stator design. Its compact footprint and high efficiency make it ideal for space-constrained machines requiring rapid acceleration, precise speed control, or repetitive positioning—such as CNC axes, printing presses, or assembly robots.

Technical Specifications

Main Features and Advantages

✅ High Dynamic Performance: Low rotor inertia and high torque-to-inertia ratio enable ultra-fast acceleration/deceleration cycles—critical for pick-and-place, cutting, or indexing applications.

✅ Robust Industrial Design: IP65 protection and sealed bearings ensure reliable operation in dusty, humid, or washdown environments (e.g., food & beverage, metalworking).

✅ Fanless Operation: The KG0 variant uses natural cooling, eliminating fan noise, maintenance, and potential failure points—ideal for cleanrooms or quiet production areas.

✅ Seamless Drive Integration: Fully compatible with Rexroth IndraDrive Cs/CsH/M servo drives. Auto-identification via motor ID chip (if equipped) simplifies commissioning in IndraWorks engineering suite.

✅ Precision Feedback: Built-in 2048 ppr incremental encoder provides accurate speed and position feedback for closed-loop control without external sensors.

✅ Modular Flexibility: Part of a scalable platform—same flange and mounting dimensions across MKD071 variants, allowing easy power upgrades or downgrades.

Application Field

The MKD071B-035-KG0-KN excels in applications requiring high precision, repeatability, and reliability:

• Machine Tools: Feed axes in milling machines, lathes, and grinders where smooth motion and minimal vibration are essential.

• Packaging Machinery: Filling, capping, labeling, and cartoning systems needing synchronized multi-axis coordination.

• Material Handling: Robotic arms, gantries, and conveyor diverters benefiting from rapid start-stop cycles.

• Printing & Converting: Web tension control, register correction, and reel drive systems demanding constant torque at low speeds.

• Automation Cells: Assembly, testing, and inspection stations in automotive or electronics manufacturing.

Related Products

• MKD071B-035-KG3-KN: Same motor with integrated holding brake

• MKD071B-045-KG0-KN: Higher power variant (4.5 kW) in same frame

• MSK071B-035: Alternative series with different thermal design or feedback options

• IndraDrive CsB03.5: Compatible compact servo amplifier for this motor

• HMS071B-035: Hollow shaft version for direct coupling to ball screws or gears

• RKB071: Mounting kit or adapter flange for non-standard installations

Installation and Maintenance

? Installation Tips:

• Ensure proper grounding via the motor’s grounding terminal to prevent bearing currents.

• Use shielded motor and encoder cables, grounded at the drive end only, to minimize EMI.

• Align coupling carefully to avoid excessive radial loads (> specified limit in datasheet).

• Verify encoder cable pinout matches IndraDrive requirements (typically 15-pin DSUB or hybrid connector).

?️ Maintenance:

• No routine maintenance required (sealed bearings, no brushes).

• Inspect shaft seal and housing annually in aggressive environments.

• Monitor operating temperature—continuous overload may reduce lifespan.

• Avoid condensation during shutdown in high-humidity areas.