Description
Rexroth MSK030C-0900-NN-M1-UG1-NNNN (R911308684) – High-Performance IndraDyn S Servo Motor for Compact, Precise Motion
The Rexroth IndraDyn S MSK030C-0900-NN-M1-UG1-NNNN is a compact, high-torque density synchronous servo motor designed for fast, precise axes in limited spaces. From my experience, this size is a sweet spot for packaging heads, electronics assembly fixtures, and small indexing stations where quick acceleration and smooth speed control matter more than raw horsepower. The material number R911308684 helps your maintenance team match it 1:1 with the installed unit.
Company’s Order Placement Process and Guarantees
- Warranty: 365 days
- Delivery: 1 week if in stock; no more than 1 month at the latest
- Payment: 50% advance payment; full payment before delivery
- Express options: FedEx, UPS, DHL
Key Features
- Compact MSK030 frame with C-length: Fits tight machine layouts while delivering quick response for light-to-medium duty axes.
- 0900 winding set: Optimized for dynamic performance with IndraDrive, balancing rated speed and torque for general automation tasks.
- NN (no holding brake): Ideal for servo-driven applications where the drive’s torque hold or mechanical locking is sufficient.
- M1 high‑resolution absolute feedback: Typically a Rexroth-supported absolute encoder for precise positioning and quick homing without external sensors.
- UG1 shaft configuration: Commonly a keyed shaft with shaft sealing ring, supporting secure torque transfer and improved ingress protection.
- Rugged IP protection: In many cases, MSK motors with shaft seal and sealed connectors achieve IP65 for industrial environments.
- IndraDrive ready: Seamless with Rexroth IndraDrive controllers, minimizing commissioning time and ensuring reliable diagnostics.
- Low cogging, smooth motion: Helps achieve stable velocity control in vision applications or precise dispensing where ripple shows up immediately.
Technical Specifications
| Brand / Model | Rexroth IndraDyn S / MSK030C-0900-NN-M1-UG1-NNNN (Material No. R911308684) |
| HS Code | 8501.51 (AC servo motor, output not exceeding 750 W – typical for MSK030 frame) |
| Power Requirements | Driven by Rexroth IndraDrive (3‑phase supply to drive; DC bus typically around 540 Vdc with 400 Vac mains). Motor phases U/V/W via standard power connector. |
| Dimensions & Weight | Frame size 030 (compact square flange), length code C; typically lightweight (< 2 kg) for tight-axis installations. |
| Operating Temperature | 0…+40°C ambient (standard); operation up to +55°C usually possible with derating and proper cooling. |
| Signal I/O Types | 3‑phase power (U/V/W + PE); integrated absolute encoder (M1) via dedicated feedback connector; typically no brake (NN). |
| Communication Interfaces | Encoder feedback per M1 variant supported by Rexroth IndraDrive (commonly absolute feedback such as Hiperface/EnDat, depending on build). |
| Installation Method | IEC-style flange mounting; keyed shaft (UG1) for couplings/pulleys; rotatable power/feedback connectors for neat cable routing. |
| Protection | Industrial IP protection; with shaft seal configurations, IP65 is typical when correctly installed. |
Application Fields
You might notice that MSK030C shows up in places where dynamics trump size: fast pick‑and‑place gantries, labelers, form‑fill‑seal machines, compact conveyor indexing, and light rotary axes in printing or inspection systems. A medical device OEM told us they chose this exact frame to keep a small enclosure footprint while maintaining repeatable positioning for a dispensing head.
Advantages & Value
- Reliability under continuous duty: The IndraDyn S platform is known for stable thermal behavior and long bearing life, even in high start/stop cycles.
- Compatibility: Native fit with Rexroth IndraDrive simplifies wiring, parameter sets, and service tooling—typically saving hours on commissioning.
- Footprint savings: High torque density allows downsizing the axis without sacrificing dynamics, which often cuts cabinet size and mechanical cost.
- Predictable lifecycle cost: Genuine Rexroth parts, standard connectors, and widely available spares reduce downtime risks and firefighting later on.
- Procurement clarity: Exact material number (R911308684) reduces mix-ups between similar MSK variants, especially when replacing legacy stock.
Installation & Maintenance
- Mounting environment: Rigid IEC flange; keep alignment within coupling tolerances to avoid bearing stress. Use the keyed shaft (UG1) with matching hubs.
- Cabinet/drive setup: Ensure adequate ventilation around the IndraDrive; follow Rexroth cable length specs and EMC grounding for power and feedback.
- Wiring: Separate motor power and feedback cables; route away from high‑noise devices. Verify PE integrity and connector seals to maintain IP rating.
- Safety: Lock out power before servicing. Because NN = no holding brake, consider mechanical safety measures for vertical axes.
- Routine care: Check connectors for tightness and seal condition; keep the motor surface free of dust buildup; review drive firmware updates during scheduled service.
- Commissioning tips: Load the correct motor data set for MSK030C-0900 in the drive. From my experience, an auto‑tune followed by fine velocity loop tweaks yields noticeably smoother profiles.
Quality & Certifications
- Certifications: CE compliant; UL recognition and RoHS conformity are typical for Rexroth MSK series.
- Manufacturer warranty: Backed by our 365‑day warranty policy.
If you’re standardizing across multiple stations, the MSK030C format seems to be a safe choice—small, predictable, and easy to keep in stock. If you need the same motor with a holding brake or a different encoder, we can match the exact option codes to your drive list to avoid re‑engineering.
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