REXROTH MSK030C-0900-NN-M1-UG1-NNNN

Core Technical Specifications

• Frame Size: MSK030 (square flange width 60 mm)
• Stator Length Code: C
• Winding Code 0900: Maximum mechanical speed 9000 rpm
• Continuous Standstill Torque: 0.9 N·m
• Peak Torque: 4.0 N·m
• Continuous Standstill Current: 1.7 A
• Maximum Peak Current: 6.8 A
• Encoder Configuration: M1 = Optical multi-turn absolute Hiperface encoder, 128 signal periods
• Cooling Method: NN = Natural convection self-cooling
• Connector: UG1 = 240° rotatable power + encoder hybrid plug
• Shaft Form: Smooth plain shaft without keyway
• Protection Class: IP65 stator housing, IP64 shaft seal
• Thermal Class: Class 155 winding insulation
• Net Weight: 1.3 kg
• Operating Ambient Temperature: 0 °C ~ +40 °C
• Part Number Identifier: R911308684 factory unique serial part code

Function & Performance Features

1. Ultra-high torque density miniature design, supports up to 9000 rpm ultra-high speed stable operation
2. Multi-turn absolute Hiperface encoder, power-off position storage, no homing required after restart
3. 240° rotatable plug connector, flexible cable routing in narrow installation space
4. Low cogging torque design, ultra-smooth rotation under micro-speed precision positioning
5. Full IP65 housing protection, suitable for workshop light dust and splash environment
6. Low noise operation ≤75 dB(A) under full load operation

Working Principle

1. High-energy rare earth permanent magnet rotor generates stable magnetic field inside stator
2. Rexroth IndraDrive servo driver outputs sinusoidal three-phase current to stator winding to generate rotating magnetic field
3. Rotor follows rotating magnetic field to output precise high-speed torque and angular displacement
4. Optical absolute encoder real-time feeds back rotor multi-turn position data to driver for full closed-loop position control
5. Internal winding temperature sensor transmits thermal data to driver for overheat protection trigger

Material Composition & Structural Characteristics

• Motor Housing: Extruded aluminum alloy with black anodic oxidation surface, natural heat dissipation fin structure
• Rotor Core: Laminated silicon steel sheet embedded with high-performance rare earth permanent magnets
• Stator Winding: Class 155 high-temperature resistant enameled copper wire, vacuum impregnated insulating paint
• Output Shaft: High-strength alloy steel precision grinding, wear-resistant surface treatment
• Encoder Rear Cover: Sealed aluminum alloy housing with fluorine rubber waterproof sealing ring

Installation Requirements

1. Standard square flange surface mounting, four M3 fixing bolts evenly tightened to avoid flange stress deformation
2. Adopt elastic bellows coupling to connect motor shaft and load, eliminate radial and axial installation offset
3. Rotate power/encoder plug to optimal angle before wiring to reduce cable bending stress
4. Reserve ≥15 mm heat dissipation gap around motor aluminum housing, do not cover with heat insulation material

Application Scenarios

• High-speed PCB drilling machine spindle auxiliary feed axis
• Small precision laser cutting equipment motion drive
• Electronic component high-speed sorting machine positioning axis
• Desktop mini CNC engraving machine high-speed feed shaft
• Automated optical inspection (AOI) equipment precision motion platform

Usage Precautions

1. Do not continuously operate at maximum 9000 rpm for more than 8 hours; high speed will accelerate bearing wear
2. Avoid metal debris splashing on shaft seal during machining production, will scratch seal ring and cause oil leakage
3. Do not disassemble encoder rear cover without professional maintenance tools, will damage absolute position storage function
4. Regularly inject high-temperature bearing grease every 8000 operating hours to extend service life