Bosch Rexroth R911296025 MKE047B-144-KP0-BENN Servo Motor – Obsolete MKE Series Spare Part

Technical Dossier

Product Details And Specifications

Bosch Rexroth R911296025 MKE047B-144-KP0-BENN Servo Motor – Obsolete MKE Series Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters such as rated torque, rated speed, and winding resistance are not published here to prevent misapplication. Confirm all parameters against your original Rexroth project documentation or contact us for datasheet support.

Solving the Discontinued Hardware Crisis

The MKE047B series was designed for tight integration with Rexroth's closed-loop digital drive ecosystem. Unlike generic servo motors, the MKE series uses proprietary encoder protocols and motor feedback data stored within the drive's non-volatile memory (P-0-0074, P-0-0075 parameter sets). Substituting a non-Rexroth motor — even one with matching frame size and torque ratings — requires re-engineering the feedback interface, recalibrating current controller gains, and in most cases, engaging a Rexroth-certified commissioning engineer. That process takes weeks and introduces unquantified risk into a previously validated safety-rated axis.

DriveKNMS operates specifically within this gap. Our sourcing network targets decommissioned plant equipment, OEM overstock, and controlled surplus channels to recover components like the R911296025 before they are lost to the secondary market permanently.

Condition & Reliability Assurance

Discontinued servo motors present specific failure modes that differ from in-production units. Our 5-step QA protocol addresses the degradation patterns most commonly observed in stored or field-removed MKE series motors:

• Step 1 – Electrolytic Capacitor Assessment: Internal capacitors in the resolver excitation circuit and brake control board are inspected for ESR drift and physical swelling. Units showing capacitor aging beyond tolerance are flagged for component-level refurbishment before dispatch.
• Step 2 – Firmware & Encoder Data Verification: Where applicable, resolver output signal integrity is tested under simulated load conditions. DSF encoder units are verified for correct signal framing compatible with IndraDrive firmware versions 05VRS and above.
• Step 3 – Pin & Connector Corrosion Inspection: All motor power connectors (typically Rexroth M23 or M17 series) and feedback connectors are inspected under magnification for oxidation, pin retraction, and contact resistance. Corroded contacts are the leading cause of intermittent F8xxx drive faults.
• Step 4 – Winding Insulation Resistance Test: Phase-to-phase and phase-to-ground insulation resistance is measured at 500V DC. Units below 100MΩ are rejected.
• Step 5 – Mechanical Inspection: Shaft runout, bearing play, and brake engagement force are measured against Rexroth's published service tolerances. Units with bearing wear or brake slip are not dispatched.

Units passing all five stages are dispatched with a test record. Units requiring refurbishment are clearly identified as such, with full disclosure of work performed.

Extending Automation Asset Life by 5–10 Years: A Maintenance Strategy for Plant Management

The decision to retire an automation system is rarely driven by the mechanical condition of the machine itself. In the majority of cases, retirement is forced by the unavailability of a single electronic component — a servo motor, a drive card, or a feedback device — that costs less than 0.5% of the machine's replacement value. This is a procurement failure, not an engineering one.

For plant managers operating legacy Rexroth, Siemens, Fanuc, or Mitsubishi drive platforms, the following strategy has been validated across multiple manufacturing sectors to extend system service life by 5–10 years at a fraction of the cost of system migration:

Q: How do I confirm the unit is genuine and not counterfeit?
A: All Rexroth MKE series motors carry a laser-etched R-number on the motor nameplate and a traceable manufacturing date code. We verify nameplate data against Rexroth's published R-number format structure and cross-reference physical construction against known-genuine reference units. Customers are encouraged to request pre-shipment photos of the nameplate and connector condition.

Q: Should I buy one spare or multiple?
A: For a single installed axis, one spare is the minimum prudent holding. If the same motor model is installed on multiple axes, we recommend holding one spare per three installed units, or one spare per critical single-point-of-failure axis — whichever is greater. Given the declining availability of this model, purchasing two units now is a lower-risk position than sourcing a second unit under emergency conditions 18 months from now.

Q: Can you source additional units if I need more than one?
A: Availability fluctuates. Contact us with your required quantity and timeline. We will provide a sourcing assessment within 24 hours.