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Good Price Original New AC Servo Motor YASKAWA SGM7A-02A7A6C Wonderful Performance for Industrial Application
| Place of Origin | Japan |
| Brand Name | YASKAWA |
| Certification | CE |
| Model Number | SGM7A-02A7A6C |
YASKAWA SGM7A-02A7A6C is part of the Sigma-7 SGM7A family—compact, low-inertia AC servo motors designed for fast, clean motion with tight control. If you’re building or maintaining equipment that lives and dies by responsiveness (pick-and-place, small indexing tables, compact conveyors, precision feeders, semiconductor sub-modules, packaging axes), this model sits in that sweet spot where you get high dynamic performance without dragging around extra mass or inertia.
I’m going to keep this honest: model suffixes in Yaskawa part numbers can encode options (brake, shaft style, encoder variants, environmental details, etc.). So while SGM7A-02A7A6C is widely recognized as a small-frame, low-inertia Sigma-7 motor, you should confirm exact rated power, current, and mechanical details against the official datasheet for your drive and region. What matters for real-world engineering and sourcing is not the mythology of a part number, but the match between motor, drive, load, and control profile.
What makes the SGM7A line a workhorse is the combination of high-resolution feedback, stiff control, and low mechanical inertia. The result is a motor that can accelerate and decelerate quickly, settle precisely, and remain stable even when your motion profile gets spicy—short moves, frequent starts/stops, tight cycle times, and a machine that isn’t always perfectly balanced.
Positioning the SGM7A-02A7A6C in a practical way
Think of this motor as a precision sprinter rather than a heavy lifter. When your load is modest and your cycle time is brutal, low inertia is your friend. You reduce overshoot risk, improve settling time, and pair well with a modern Sigma-7 servo amplifier. That combination is what lets you chase higher throughput while keeping quality stable.
This also means you can often downsize mechanical components. Smaller couplings, lighter brackets, tighter layouts, and easier thermal management—all of which are business wins disguised as mechanical decisions.
Key strengths in plain engineering terms
The Sigma-7 architecture is known for excellent control bandwidth and fine feedback, which together translate into:
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Faster response to command changes
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More consistent torque delivery at low speeds
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Better suppression of vibration and resonance
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Cleaner motion in short-stroke, high-frequency tasks
If you’re dealing with micro-stops, repeatability, or high-count indexing, this is the category of servo motor you want on your shortlist.
Feature-to-benefit map
| Feature | What It Does | Why It Matters on Real Machines |
|---|---|---|
| Low-inertia rotor design (SGM7A family trait) | Enables rapid acceleration/deceleration | Shorter cycle times and higher throughput without sacrificing stability |
| High-resolution feedback ecosystem (Sigma-7 platform) | Improves position/speed control fidelity | Better repeatability, smoother low-speed behavior, less tuning pain |
| Compact form factor typical of small-frame models | Fits in tight machine envelopes | Cleaner machine design, easier retrofits, less cable and layout stress |
| Strong compatibility with Sigma-7 drives | Ensures optimized control algorithms | You get the full performance envelope the platform was built for |
| Robust industrial reliability expectations | Designed for continuous automation duty | Lower downtime risk and better lifecycle economics |
Typical application fit
| Application Type | Why SGM7A-02A7A6C Fits | Notes for Selection |
|---|---|---|
| Pick-and-place / compact robotics axes | Fast acceleration and precise settling | Confirm inertia ratio and desired jerk limits |
| Packaging and labeling sub-axes | High-speed short strokes | Pay attention to thermal duty cycle |
| Small indexing tables | Excellent repeatability and responsiveness | Use rigid mounting and verify backlash sources |
| Electronic assembly / inspection tooling | Smooth micro-motions | Encoder and noise immunity become key |
| Retrofit of older Sigma or other brands | Modern control improvements | Verify flange, shaft, and connector differences |
Selection and tuning reality checks
A servo motor never wins alone. The drive selection and load matching will decide whether you get a Ferrari experience or a forklift with racing stripes.
Here’s a quick sanity checklist:
| Item | What to Verify | Why It Prevents Headaches |
|---|---|---|
| Inertia ratio | Load inertia vs. motor inertia | Too high and you’ll fight oscillation and slow settling |
| Duty cycle | Peak vs. continuous motion profile | Prevents thermal derating surprises |
| Brake requirements | Vertical axes or safety hold needs | The “right” suffix matters here |
| Mechanical interface | Shaft, keyway, flange, mounting depth | Avoids “it almost fits” disasters |
| Cable and encoder compatibility | Correct harness and feedback standard | Prevents commissioning delays and fault loops |
Why this model matters for sourcing teams
For industrial spare parts and global supply, the SGM7A-02A7A6C sits in a favorable category:
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High practical demand: small-frame, high-utility servo motors are common across multiple machine types.
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Clear substitution logic: within Sigma-7, there are often adjacent models that can be evaluated if you confirm mechanical and electrical constraints.
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Strong resale and service value: compact Sigma-7 motors are widely used in modernized lines.
That said, avoid casual substitutions based only on “looks similar.” Compatibility is a three-legged stool: mechanical fit, electrical rating, and feedback/drive pairing.
Integration tips that often get ignored
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Mounting stiffness is not optional. Low-inertia motors expose weak structures. If the bracket flexes, your tuning budget evaporates.
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Cable routing matters. High-resolution feedback is great until it shares a noisy pathway with high-power lines.
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Thermal margin is your hidden life insurance. Even small motors can become the hot spot in tight cabinets.
Short concluding take
The YASKAWA SGM7A-02A7A6C is a compact, low-inertia Sigma-7 servo motor that is best understood as a high-response precision motion component for smaller axes with demanding cycle times. It’s a smart choice when you need speed, repeatability, and stable control in a tight mechanical footprint. Just don’t treat the part number like a fortune cookie—verify the exact electrical ratings and option codes for your target drive, axis orientation, and mechanical interface.
In a world where machines keep getting faster and tighter, motors like this are less “nice to have” and more “the quiet enabler of your OEE goals.” The best outcomes come when you pair it with the correct Sigma-7 amplifier, validate inertia matching, and build a rigid, well-routed, thermally sensible installation. That’s where this model stops being a line item and starts being a performance upgrade.
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