Description
Bosch Rexroth MSK030C-0900-NN-M1-UG0-NNNN — IndraDyn S Synchronous Servo Motor
Product Overview
The MSK030C-0900-NN-M1-UG0-NNNN (Rexroth article number R911308683) is a permanent magnet synchronous servo motor from Bosch Rexroth’s IndraDyn S MSK product family. It is a high-performance servo motor designed for motion control applications requiring high dynamic response, high torque density, and precise position feedback. Widely used in CNC machines, packaging lines, printing presses, robotics, semiconductor equipment, and plastics processing.
This is the C-frame variant (higher torque class compared to the B-frame), rated for 3,000 RPM base speed with a smooth shaft and keyway (no holding brake).
Rexroth MSK030C-0900-NN-M1-UG0-NNNN R911308683
Model Number Breakdown
| Field | Meaning |
|---|---|
| MSK | IndraDyn S synchronous servo motor series |
| 030 | Frame size — 115 mm stator outer diameter |
| C | Stack length — high torque class (vs. B = medium, D/E = extra high) |
| 0900 | Winding code — rated base speed 3,000 RPM |
| NN | Standard configuration |
| M1 | Encoder type — multi-turn absolute, Hiperface interface, 128 signal periods/rev |
| UG0 | Shaft — smooth shaft with DIN 6885 keyway (no holding brake) |
| NNNN | Standard options — no special paint, standard connector, standard design |
Related Variants in the Same Family
| Part Number | Difference |
|---|---|
| MSK030B-0900-NN-M1-UG0-NNNN | B-frame (medium torque, ~3.2 Nm continuous) |
| MSK030C-0900-NN-M1-UG0-NNNN | C-frame (high torque, ~4.8 Nm continuous) |
| MSK030C-0900-NN-M1-UG1-NNNN | Shaft with flat (DIN 5480) |
| MSK030C-0900-NN-M1-UP0-NNNN | Shaft with threaded end |
| MSK030C-0900-NN-M1-UP1-NNNN | Shaft with thread + flat |
| MSK030C-0900-NN-M1-BG1-NNNN | Shaft with keyway + holding brake |
| MSK030C-0900-NN-S1-UG0-NNNN | Single-turn absolute encoder (S1 = EnDat) |
| MSK030C-0900-NN-M3-UG0-NNNN | Motorized encoder (M3 = SIN/COS + Hiperface) |
Key Technical Specifications
| Parameter | Value |
|---|---|
| Rated continuous torque | ~4.8 Nm |
| Peak torque | ~14–16 Nm (typical, ~3× rated for 1s) |
| Rated speed | 3,000 RPM |
| Max speed | 4,500–9,000 RPM (depending on drive voltage) |
| Rated power (continuous) | ~1.5 kW |
| Peak power | ~4.5–5.0 kW (short duration) |
| Stator outer diameter | ~115 mm |
| Motor length (without shaft) | ~170 mm |
| Shaft diameter | 22 mm |
| Shaft type | Smooth with DIN 6885 keyway |
| Weight | ~3.5–4.0 kg |
| Protection rating | IP65 (with correct cable gland) |
| Insulation class | F (155°C max winding temperature) |
| Cooling | Self-ventilated (IC411) |
| Encoder | Hiperface, multi-turn absolute, 128 sin/cos periods |
| Encoder supply | 5 V DC via motor connector |
| Connector type | M23 (12-pin) |
| Ambient temperature | 0°C to +40°C (continuous), -20°C to +60°C (storage) |
| Bearing type | Deep groove ball bearing, greased, fixed bearing at B-side |
| Bearing life L10h | 30,000 hours (at 40°C ambient) |
| Certifications | CE, UL/cUL, CSA, ATEX available on request |
| Article number | R911308683 |
Core Functions
High Torque Density — The C-frame delivers approximately 4.8 Nm continuous torque in a compact 115 mm package — roughly 50% more torque than the B-frame (3.2 Nm) in the same outer diameter. Ideal for applications where space is limited but high force is required.
Multi-Turn Absolute Position Feedback — The Hiperface encoder provides position data immediately on power-up — no homing required. Multi-turn capability tracks up to 4,096 revolutions (12-bit counter), with backup battery (CR1632 or internal rechargeable) lasting ~10 years.
Wide Speed Range — Constant torque from 0 to 3,000 RPM, constant power from 3,000 to 9,000 RPM. Supports both high-speed traversing and high-torque cutting in a single motor.
High Dynamic Response — Low rotor inertia combined with powerful permanent magnets enables mechanical time constants <10 ms and speed response bandwidths exceeding 1 kHz when paired with modern drives.
Robust Construction — Aluminum housing with high thermal conductivity, Class F insulation, precision-ground 22 mm shaft, IP65 sealing, and deep-groove ball bearings rated for 30,000 hours.
