MKD071B-061-KP0-KN | 6000 RPM Servo Motor

Description

MKD071B-061-KP0-KN | 6000 RPM Servo Motor

 

Product Introduction

The Bosch Rexroth Indramat MKD071B-061-KP0-KN is a 071B-frame permanent-magnet synchronous servo motor from the MKD family. Its 061 winding is paired with resolver feedback and an integrated multiturn absolute encoder, while the KP0 configuration specifies a keyed shaft and no holding brake. The KN suffix completes the motor’s connection/housing configuration.

This configuration is particularly important for legacy machine replacement because the shaft and brake arrangement differs materially from the KG1 version. Published specifications identify 8.0 Nm continuous standstill torque, a 4,500 RPM characteristic speed, and up to 6,000 RPM maximum speed in applicable documentation. The motor uses a 115 mm flange and 95 mm centering diameter, with resolver/absolute feedback extending over more than 4,096 revolutions.

Key Technical Specifications

• Manufacturer: Bosch Rexroth Indramat
• Model: MKD071B-061-KP0-KN
• Material/Order Number: R911262599; verify physical nameplate
• Series: MKD Synchronous Motors
• Motor Size: 071
• Motor Length: B
• Winding Code: 061
• Product Type: Three-phase permanent-magnet synchronous servo motor
• Continuous Standstill Torque: 8.0 Nm
• Characteristic Motor Speed: 4,500 RPM
• Maximum Speed: 6,000 RPM
• Rated Speed: 5,000 RPM reported by current product references; verify applicable rating documentation
• Current: Approximately 11.2 A in published product data
• Voltage: Approximately 283–380 VAC in published product data
• Voltage Constant: Approximately 70 V/1,000 RPM
• Torque Constant: Approximately 0.77 Nm/A at 20°C
• Winding Resistance: Approximately 1.45 ohms at 20°C
• Winding Inductance: Approximately 7.2 mH
• Feedback: Resolver with integrated multiturn absolute encoder
• Position Detection: Absolute, greater than 4,096 revolutions
• Shaft: Keyed shaft per DIN 6885-1
• Shaft Seal: Yes
• Holding Brake: None
• Connection: Junction/connection box
• Flange: 115 mm
• Centering Diameter: 95 mm
• Protection Rating: IP65
• Insulation Class: F
• Cooling: Natural convection in applicable MKD configurations
• Weight: Approximately 9 kg, depending on documentation/configuration

 

Application Scenarios & Pain Points

1. Legacy Indramat Servo-Axis Replacement

The MKD071B-061-KP0-KN is intended for replacement situations where the existing motor requires the same 071B / 061 / KP0-KN configuration.

Pain point: Matching only the MKD071B frame does not establish electrical or mechanical interchangeability.

2. Machine-Tool Positioning

The synchronous motor architecture and multiturn absolute feedback are applicable to closed-loop positioning axes in machine tools and other automated machinery.

Pain point: The 061 winding must be matched to the drive’s motor parameters. Substituting another winding can change current, speed, torque, and tuning requirements.

3. Packaging and Printing Equipment

The MKD family has been used in automated production, packaging, printing, handling, and machine-tool applications.

Pain point: The keyed shaft is a mechanical interface requirement. A plain-shaft KG1 motor is not a drop-in mechanical substitute for this KP0 configuration.

4. Servo Axes Without Integrated Holding Brake

The KP0 configuration deliberately has no holding brake, which can be appropriate where the machine uses an external braking or load-holding mechanism.

Pain point: Installing a no-brake motor on an axis that previously depended on a motor brake can create a serious machine-safety and load-retention issue.

5. Legacy Maintenance Inventory

The model is relevant for maintenance stock supporting older Indramat-controlled production equipment.

Pain point: Stored servo motors should not be released directly to production based solely on a clean exterior. Feedback, winding insulation, bearings, shaft condition, and drive compatibility should be documented.

 

QA & Live Testing SOP

1. Nameplate and Identity Verification

• Photograph the complete nameplate.
• Confirm MKD071B-061-KP0-KN.
• Verify the material number against the physical label.
• Use R911262599 as the primary procurement reference, but resolve any nameplate discrepancy before shipment.
• Confirm winding code 061.
• Record serial number and manufacturing information.

2. Mechanical Inspection

• Verify the 115 mm flange.
• Verify the 95 mm centering diameter.
• Inspect the keyed shaft and keyway for deformation or wear.
• Check the shaft sealing ring.
• Rotate the shaft manually.
• Check for bearing noise, roughness, radial play, or axial play.
• Inspect mounting surfaces for impact or corrosion.

3. Winding Test

• Measure resistance between each motor phase.
• Compare the three phase-to-phase readings for balance.
• Perform an appropriate insulation-resistance test.
• Check each phase against the motor frame.
• Record measurements with ambient temperature.
• Do not connect high-voltage insulation testers to the feedback circuitry.

4. Feedback Verification

• Inspect the resolver wiring and junction box.
• Check terminals for corrosion or looseness.
• Connect only to a compatible Rexroth/Indramat servo drive.
• Confirm resolver feedback detection.
• Verify feedback direction at low speed.
• Confirm multiturn/absolute position behavior through the compatible control system.

5. Controlled Rotation Test

• Use current-limited startup conditions.
• Begin at low speed.
• Confirm correct rotation direction.
• Monitor motor current and following error.
• Check vibration and bearing noise.
• Increase speed only within the limits of the test fixture.
• Do not use the 6,000 RPM maximum value as a routine incoming-inspection speed.

6. Brake Configuration Check

There is no integrated holding brake.

Verify that:

• The machine does not require a motor-mounted brake.
• Any external load-holding device is operational.
• Vertical-axis applications have an appropriate independent load-retention method.
• The drive configuration does not expect a motor brake that this KP0 motor does not contain.

7. Final Documentation and Packaging

• Record nameplate photographs.
• Record serial number and material number.
• Document winding, insulation, feedback, and rotation tests.
• Protect the keyed shaft and keyway against impact.
• Protect the junction box from mechanical shock and moisture.
• Use packaging that prevents shaft loading during transportation.

 

Field Engineer’s Pitfall Guide

❗ KP0 means keyed shaft and no holding brake.
The P identifies the keyed shaft configuration, while 0 identifies the absence of a holding brake. This is the major mechanical distinction from the KG1 version.

❗ Do not confuse this motor with MKD071B-061-KG1-KN.
The KG1 version has a plain shaft and 5 Nm holding brake. The KP0 version has a keyed shaft and no brake.

❗ Do not assume the 061 winding is interchangeable with every winding.
The winding code affects the motor’s electrical characteristics and required drive parameters.

❗ Verify the material number.
Multiple commercial sources identify this model as R911262599, while one Indramat USA page displays R91126599. For procurement traceability, the physical motor nameplate should control if a discrepancy exists.

❗ Do not install KP0 on a vertical axis without checking load retention.
Because this configuration has no motor-mounted holding brake, the machine must have another suitable means of retaining the load when servo power is removed.

❗ Do not use 4,500 RPM, 5,000 RPM, and 6,000 RPM interchangeably.
Published sources use these values in different rating contexts. Confirm the applicable drive/motor documentation before defining the machine’s continuous operating speed or maximum commanded speed.

 

Intent-Driven FAQ

What is the Bosch Rexroth -061-KP0-KN?

It is a Bosch Rexroth Indramat MKD permanent-magnet synchronous servo motor with a 071B frame, 061 winding, resolver/multiturn absolute feedback, keyed shaft, and no integrated holding brake.

What is the material number?

Current technical and commercial references identify R911262599 with . Because one published source shows a shortened R91126599 reference, verify the number directly from the motor nameplate before using it as the sole purchasing identifier.

Does the have a brake?

No. The KP0 configuration has no integrated holding brake.

Does it have a keyed shaft?

Yes. The P configuration specifies a keyed driven shaft, with shaft sealing ring.

What feedback does this motor use?

It uses resolver feedback with an integrated multiturn absolute encoder, providing absolute position detection over more than 4,096 revolutions.

What is the continuous standstill torque?

The published MKD data identifies 8.0 Nm continuous standstill torque under the applicable natural-cooling/thermal condition.

What is the speed?

Published references identify 4,500 RPM characteristic speed, while current product data also reports 5,000 RPM rated speed and 6,000 RPM maximum speed. These terms should be verified against the applicable motor documentation rather than treated as equivalent.

What are the mounting dimensions?

The motor uses a 115 mm flange with a 95 mm centering diameter.

Can I replace an -061-KG1-KN with this motor?

Not as a direct mechanical replacement without checking the machine. The KP0 has a keyed shaft and no brake, while the KG1 has a plain shaft and 5 Nm brake. Coupling and load-retention arrangements must therefore be evaluated separately.

What should be checked before purchasing this legacy motor?

Verify the complete type code, physical nameplate/material number, winding 061, keyed shaft, absence of brake, feedback system, flange and centering dimensions, junction box, shaft condition, winding insulation, resolver feedback, and compatibility with the installed Rexroth drive.