Description
BOSCH REXROTH MKD090B-047-KG1-KN Servo Motor – Dynamic, precise motion for packaging, machine tools, and handling lines
The BOSCH REXROTH MKD090B-047-KG1-KN is a permanent‑magnet synchronous servo motor from the MKD series, built for high dynamics and repeatable positioning. From my experience, this 090 frame with the 047 winding hits a sweet spot: fast acceleration, stable continuous torque, and very clean positioning when paired with DIAX04 or IndraDrive controllers. You might notice that it’s often specified in indexing tables, pick‑and‑place gantries, and compact machining axes where uptime and quick cycle times matter.
Order Placement Process & Guarantees
- Warranty: 365 days
- Lead time: typically 1 week if in stock; no more than 1 month latest
- Payment: 50% advance payment; full payment prior to delivery
- Shipping: FedEx, UPS, DHL
Key Features
- High‑dynamic MKD platform – Low‑inertia rotor with strong magnets for rapid start/stop and tight following error.
- 047 winding code – Suits mid‑to‑high speed applications (typically around 3000 rpm rated, up to ~4500 rpm max) with stable continuous torque.
- G1 digital servo feedback – Bosch Rexroth digital feedback for precise position/velocity control with compatible drives.
- Mechanical K variant – Shaft with keyway and shaft seal for secure coupling and better ingress protection.
- Integrated holding brake (24 VDC) – Common on this KG1 configuration; helps maintain axis position when powered down.
- Industrial IP rating – In most cases IP65 at the housing when mated connectors are used; dependable in standard machine environments.
- Flange‑mount design (B5‑style) – Frame size 090 makes it easy to drop into existing MKD footprints or compact axis layouts.
- Thermal protection – Built‑in temperature sensor/thermal contact to protect the motor via the drive.
Customer note: “We swapped in the MKD090B-047-KG1-KN on a cartoner transfer axis. Tuning was quick and we shaved a few tenths off each cycle without raising temperatures.”
Technical Specifications
| Brand / Model | BOSCH REXROTH MKD090B-047-KG1-KN |
| HS Code | 8501.52 (AC multi‑phase motors >750 W and ≤75 kW) |
| Motor Type | Permanent‑magnet synchronous servo (MKD series) |
| Frame / Length | 090 frame, length B; flange‑mount (B5‑style) |
| Winding Code / Speed | 047 winding; rated ~3000 rpm, max up to ~4500 rpm (typical for this variant) |
| Continuous Torque (standstill) | ~9–14 Nm (typ., depends on cooling and drive settings) |
| Feedback System | G1 digital servo feedback to compatible Rexroth drive |
| Holding Brake | Integrated 24 VDC brake (KG1 configuration, release via drive I/O) |
| Power Requirements | Driven via Bosch Rexroth servo drive (DIAX04 / IndraDrive). DC bus supplied by the drive; no direct mains connection to motor. |
| Signal I/O Types | 3‑phase motor power, digital feedback connector, 24 VDC brake, integrated thermal sensor |
| Communication Interfaces | Proprietary Rexroth digital feedback interface; fieldbus is handled at the drive, not the motor |
| Protection / Cooling | Typically IP65 (with mated connectors); surface cooling (natural convection) |
| Operating Temperature | 0…+40 °C ambient (industrial standard environment) |
| Dimensions & Weight | Frame 090 (flange ~140 mm class), length B; approx. 10–14 kg depending on options |
| Installation Method | Flange mount; horizontal or vertical orientation (observe bearing load limits) |
Related or Supporting Products
- BOSCH REXROTH MKD090B-058-KG1-KN – Similar mechanics with a different winding (higher back‑EMF/speed behavior).
- BOSCH REXROTH MKD090B-024-KG1-KN – Lower winding number, typically higher torque at lower speed ranges.
- BOSCH REXROTH MKD071B-061-KG1-KN – More compact frame if space is tight with reduced torque envelope.
- BOSCH REXROTH MKD112B-048-KG1-KN – Larger frame for higher continuous torque applications.
- Rexroth Servo Drives: HDS04.2, DDS02.1, DKC (EcoDrive), HCS02/HCS03 (IndraDrive) – verified compatibility with MKD feedback and power interfaces.
- Cables & Accessories: Rexroth power cable set and digital feedback cable for MKD motors; compliant mating connectors and sealed glands to maintain IP rating.
Installation & Maintenance
- Mounting & alignment: Use the B5 flange with proper dowel/fit. Align couplings to avoid excessive radial/axial loads. Torque bolts per Rexroth spec.
- Cabinet & wiring: Route shielded motor and feedback cables separately from mains. Proper PE bonding is essential. From my experience, a clean ground makes tuning smoother.
- Ventilation: Ensure ambient airflow; keep the housing free from dust build‑up. Avoid direct oil spray on seals.
- Brake & safety: Test the 24 VDC brake release via the drive before commissioning. Lock‑out/tag‑out during mechanical work.
- Drive setup: Load the correct motor data set in the Rexroth drive (type plate / motor file). Perform feedback referencing and current loop autotune.
- Routine checks: Inspect connectors and cable strain relief. Clean fins, verify insulation resistance periodically, and review bearing noise or unusual heat.
- Firmware & backups: Keep drive firmware current and back up parameters after tuning. It typically saves hours during unplanned downtime.
Quality & Certifications
- Compliance: CE compliant; many variants are UL Recognized. RoHS alignment as applicable to industrial motors.
- Protection: Typically IP65 at housing with correctly mated connectors and seals.
- Warranty: 12 months (365 days) coverage as stated above.
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