Description
Bosch Rexroth MSK030B-0900-NN-M1-UG0-NNNN — IndraDyn S Synchronous Servo Motor
Product Overview
The MSK030B-0900-NN-M1-UG0-NNNN (Rexroth article number R911308681) is a permanent magnet synchronous servo motor from Bosch Rexroth’s IndraDyn S MSK product family. It is designed for high-precision motion control applications requiring fast dynamic response, high torque density, and reliable encoder feedback. Widely used in CNC machines, packaging lines, printing presses, robotics, and semiconductor equipment.
Rexroth Synchronous PM Servo Motor MSK030B-0900-NN-M1-UG0-NNNN
Model Number Breakdown
| Field | Meaning |
|---|---|
| MSK | IndraDyn S synchronous servo motor series |
| 030 | Frame size — 115 mm stator outer diameter (approx.) |
| B | Stack length variant — medium torque class |
| 0900 | Winding code — corresponds to rated speed of 3,000 RPM (base speed) |
| NN | No special modification; standard configuration |
| M1 | Encoder type — multi-turn absolute, Hiperface interface, 128 signal periods per revolution |
| UG0 | Shaft — smooth shaft with keyway (DIN 6885), no holding brake |
| NNNN | Standard options — no special paint, no special connector, standard design |
Variants of this base model include different shaft endings (UP0/UP1 = shaft with flat, BG1 = with shaft seal), holding brake options, and connector types — all sharing the same mechanical and electrical core.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Rated torque (continuous) | ~3.2 Nm |
| Peak torque | ~12–15 Nm (typical, ~3× rated for ~1 s) |
| Rated speed | 3,000 RPM |
| Max speed | 4,500–9,000 RPM (depending on drive voltage) |
| Rated power (continuous) | ~1.0 kW |
| Peak power | ~3.0–4.7 kW (short duration) |
| Stator outer diameter | ~115 mm |
| Motor length (without shaft) | ~152.5 mm |
| Shaft diameter | 22 mm |
| Shaft type | Smooth with keyway (DIN 6885) |
| Weight | ~2.8–3.2 kg |
| Protection rating | IP65 (with correct cable gland) |
| Insulation class | F (155°C max winding temperature) |
| Cooling | Self-ventilated (IC411), optional external fan or liquid cooling |
| Encoder | Hiperface, multi-turn absolute, 128 sin/cos periods |
| Encoder supply | 5 V DC via motor connector |
| Connector type | M23 (12-pin) or M12 (depending on config) |
| Ambient temperature | 0°C to +40°C (continuous), -20°C to +60°C (storage) |
| Certifications | CE, UL/cUL, CSA, ATEX (MKE variant), RoHS |
Core Functions
High-Precision Motion Control — The motor delivers sub-arcsecond positioning accuracy when paired with a Rexroth IndraDrive (HCS02, HCS03, or HDS series). The multi-turn absolute encoder provides position feedback from power-on — no homing required.
High Torque Density — Permanent magnet rotor design achieves maximum torque in a compact 115 mm frame. Peak torque reaches 3× rated for rapid acceleration and load handling.
Wide Speed Range — Constant torque from 0 to 3,000 RPM, constant power from 3,000 to 9,000 RPM. Ideal for applications requiring both high-speed traversing and high-torque cutting.
Robust Construction — Aluminum housing with high thermal conductivity, Class F insulation, precision-ground shaft, and IP65 sealing. Optional holding brake (BG1 variant) for vertical axis hold.
Low Inertia — Rotor inertia ~30–50 g·cm², enabling extremely fast acceleration/deceleration cycles (typical mechanical time constant <10 ms).
