Overview
The Rexroth R911262600 (MKD041B-144-KP0-KN) is a digital AC synchronous servo motor from Bosch Rexroth’s MKD series. This model features permanent-magnet excitation and electronic commutation for dynamic performance. It is a Digital AC Synchronous Servo Motor known for its reliability and efficiency and belongs to the MKD motor series, notable for its capability of operating under demanding conditions supported by its fully enclosed design. This used unit is fully functional and represents a cost-effective replacement for servo-driven automation applications.
Key Features
- Characteristic motor speed of 6000 RPM and continuous standstill torque of 2.7 Nm at Natural 60K and 2.9 Nm at 100K
- Shaft with keyway and sealing ring, and employs resolver feedback for absolute position detection
- IP65 protection rating and insulation class F, suitable for temperatures up to 105 degrees Celsius
- Three pole pairs and a winding inductance of 5 mH
- No holding brake or connection box—compact form factor for space-constrained installations
- Plain shaft motor with high-quality sealing ring for harsh industrial environments
Technical Specifications
- Characteristic Speed: 6000 rpm nominal
- Continuous Standstill Torque: 2.7 Nm at natural cooling and 2.9 Nm at forced cooling
- Standstill Current: 7.5 A (60K) and 8.2 A (100K), with a peak current of 34.0 A
- Rated Speed (60K): 3000 RPM; Rated Speed (100K): 4500 RPM
- Rated Torque (60K): 1.4 Nm; Rated Torque (100K): 1.5 Nm
- Rated Power (60K): 0.53 kW; Rated Power (100K): 0.88 kW
- Rated Voltage (60K): 115 V; Rated Voltage (100K): 170 V
- Frequency (60K): 150 Hz; Frequency (100K): 225 Hz
- Torque Constant: 0.4 Nm/A
- Voltage Constant: 36.3 V/1000rpm
- Winding Resistance: 1.8 Ω
- Flange: 82 mm; Centering Diameter: 50 mm
- Weight: 4.4 kg
- Protection Class: IP65
- Insulation Class: F (105°C)
- Operating Temperature Range: −20 to +40 °C
Typical Applications
The MKD041B-144-KP0-KN is suited for precision motion control, robotics, packaging machinery, and servo-driven automation requiring compact form factors and reliable torque delivery. Its resolver feedback and electronic commutation support closed-loop positioning in industries including manufacturing, material handling, and process automation.
Compatibility & Replacements
Compatible With
- Rexroth Indramat drive systems and controllers
- EtherCAT and CANopen servo networks
- Industrial servo amplifiers and motion controllers supporting 115 V / 170 V 3-phase input
- Resolver feedback signal conditioning modules
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. This MKD041B motor may serve as a direct replacement for identical model designations in existing installations. Confirm resolver connector type and mounting flange compatibility with original equipment documentation.
Works With
- Rexroth IndraMotion MTX and MCO controllers
- CANopen and EtherCAT servo drives
- Resolver-based closed-loop feedback systems
- Industrial automation platforms supporting permanent-magnet AC servo motors
