Description
Product Introduction & Engineering Value
The Bosch Rexroth Indramat MKD090B-047-GG0-KN is a synchronous servo motor engineered for demanding motion-control applications where accurate torque delivery and reliable feedback are required. This MKD series motor combines permanent magnet technology, resolver feedback, and industrial mechanical construction for machine automation environments.
Maintenance teams commonly encounter this motor in established CNC equipment, packaging machines, printing systems, and production automation cells. Keeping a compatible replacement available can reduce downtime when an aging servo axis fails unexpectedly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bosch Rexroth Indramat |
| Model Number | MKD090B-047-GG0-KN |
| Motor Series | MKD Synchronous Servo Motor |
| Motor Size | 090 |
| Motor Length | B |
| Winding Code | 047 |
| Feedback System | Resolver feedback |
| Shaft Design | Plain shaft with shaft seal |
| Holding Brake | Without holding brake |
| Flange Size | 140 mm |
| Continuous Torque at Standstill | 12.0 Nm |
| Maximum Speed | Approximately 5000 rpm |
| Peak Current | 59.4 A |
| Winding Resistance | 1.2 Ω |
| Winding Inductance | 10.1 mH |
Field Application & The “Trench” Experience
A packaging equipment manufacturer operating a high-speed filling line experienced repeated servo faults on one indexing axis. The drive controller reported position instability, but diagnostics showed the amplifier and motion parameters were within normal limits.
The maintenance team traced the issue to the aging servo motor feedback system. After installing a replacement MKD090B-047-GG0-KN, technicians verified resolver feedback, motor parameters, and mechanical alignment. The axis returned to normal operation without changing the machine PLC sequence or motion program.
Typical engineering applications include:
- Rotary indexing tables requiring repeatable acceleration and stopping accuracy.
- Printing machinery roller synchronization and tension-control systems.
- CNC machine tool axes requiring resolver-based servo feedback.
MKD090B-047-GG0-KN
Transparency SOP: QA & Testing
A servo motor should not be judged only by appearance. A proper inspection process includes:
- Mechanical Inspection
- Check shaft condition and sealing surface.
- Inspect flange mounting points.
- Verify connector and terminal box condition.
- Electrical Verification
- Measure winding resistance.
- Check insulation condition.
- Verify resolver feedback signals.
- Operational Test
- Run motor with compatible drive equipment.
- Confirm rotation stability.
- Monitor abnormal vibration, noise, or temperature rise.
- Final Documentation
- Record test values.
- Confirm model identification.
- Verify compatibility before shipment.
The Veteran’s Tech Trap Guide
⚠️ Do not replace only by the MKD090 prefix.
The complete ordering code matters. Winding code, feedback type, shaft design, and brake configuration affect drive compatibility.
⚠️ Resolver feedback requires correct motor data.
A physically compatible motor can still generate faults if the drive parameters do not match the motor winding and feedback configuration.
⚠️ Mechanical alignment problems often look like electrical failures.
Coupling damage, excessive load, or shaft misalignment can trigger overcurrent and positioning alarms.
PRO TIP: Save the original Indramat drive motor parameters before replacing the motor. Restoring the correct motor data can significantly shorten commissioning time.
Dynamic FAQ
Q1: What type of motor is the MKD090B-047-GG0-KN?
The MKD090B-047-GG0-KN is a Bosch Rexroth Indramat MKD series synchronous servo motor designed for industrial motion-control applications.
Q2: Does this model include an encoder?
This motor uses resolver feedback for relative position detection. It does not use the integrated multiturn absolute feedback configuration found on some other MKD variants.
Q3: Does the MKD090B-047-GG0-KN have a holding brake?
No. The GG0 configuration indicates a plain shaft design with no holding brake option.
Q4: What should be checked before ordering a replacement?
Verify:
- Complete motor part number
- Resolver feedback type
- Shaft configuration
- Drive compatibility
- Existing motor parameters
- Mechanical mounting dimensions
Q5: Is the MKD090B-047-GG0-KN still manufactured?
The MKD series is a legacy industrial servo family. Replacement units are commonly sourced through industrial surplus, refurbished inventory, or repair channels.
Q6: What warranty is available for tested surplus or refurbished units?
Warranty terms depend on the supplier. Qualified industrial automation suppliers typically provide limited functional warranty coverage after inspection and operational testing.
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