Yaskawa SGM7A-04AFA61 Sigma-7 400W Low-Inertia Servo Motor
Product Overview
The Yaskawa SGM7A-04AFA61 is a 400 W Sigma-7 low-inertia rotary servo motor for compact industrial machines requiring accurate positioning and fast acceleration. It delivers a rated torque of 1.27 Nm at 3000 RPM and supports an instantaneous maximum torque of 4.46 Nm.
This version uses a 24-bit incremental serial encoder and a straight shaft with key and threaded center hole. It is supplied without a holding brake or oil seal.
Main Features
- 400 W rated output for 200 VAC-class applications.
- Low-inertia rotor for high-speed positioning cycles.
- Rated torque of 1.27 Nm and peak torque of 4.46 Nm.
- Rated speed of 3000 RPM and maximum speed of 6000 RPM.
- 24-bit incremental serial encoder.
- Keyed and tapped straight output shaft.
- Compact 60 mm flange-class motor frame.
- IP67 structure, excluding the shaft opening.
Technical Specifications
| Manufacturer | Yaskawa Electric |
| Series | Sigma-7 SGM7A |
| Model | SGM7A-04AFA61 |
| Motor Type | Low-Inertia High-Speed Rotary Servo Motor |
| Power Supply Class | 200 VAC |
| Rated Output | 400 W |
| Rated Current | 2.4 Arms |
| Instantaneous Maximum Current | 9.3 Arms |
| Rated Torque | 1.27 Nm |
| Instantaneous Maximum Torque | 4.46 Nm |
| Rated Motor Speed | 3000 RPM |
| Maximum Motor Speed | 6000 RPM |
| Encoder | 24-Bit Incremental Serial Encoder |
| Shaft End | Straight with Key and Tap |
| Holding Brake | Not Included |
| Oil Seal | Not Included |
| Flange Dimension | 60 mm |
| Shaft Diameter | 14 mm |
| Shaft Length | 30 mm |
| Approximate Dimensions | 60 * 74.7 * 115.5 mm |
| Approximate Motor Weight | 1.2 kg |
| Motor Moment of Inertia | 0.216 * 10⁻⁴ kg·m² |
| Protective Structure | IP67, Excluding Shaft Opening |
Compatible System and Applications
The SGM7A-04AFA61 is normally used with a compatible Sigma-7 SERVOPACK in the SGD7S-2R8A capacity class. The final drive suffix depends on the command interface, network, safety functions and controller architecture.
Typical applications include electronic assembly equipment, compact packaging machines, inspection systems, labelling equipment, semiconductor machinery, feeders, small robots and high-speed indexing mechanisms.
Maintenance and Replacement Notes
Confirm the complete SGM7A-04AFA61 model, incremental encoder, keyed shaft, center tap, flange dimensions and connector orientation. Do not treat SGM7A-04AFA61 and SGM7A-04AFA21 as mechanically identical because their shaft configurations are different.
Check the SERVOPACK capacity, firmware, motor parameter file, power cable, encoder cable, coupling and load-inertia ratio. Mechanical alignment and coupling concentricity should be checked before commissioning to prevent abnormal vibration or bearing loading.
This model has no holding brake. A separate holding device is required when used on vertical or suspended-load axes.
Related Models
Related models include SGM7A-04AFA21 with a plain shaft, SGM7A-04AFA6C with a holding brake, SGM7A-04A7A61 with an absolute encoder and SGM7A-04A7A6C with an absolute encoder and holding brake.
Inquiry and Supply Notes
Please provide the complete nameplate, installed SERVOPACK model, cable part numbers, coupling details and photographs of the output shaft and connectors. Product condition, availability and included components must be verified for each quotation.
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