SUPERIOR ELECTRIC SS50-1280 Slo Syn Motor Rpm Synchronous .665 120V Stepping

( Brand: Superior Electric ), ( Manufacturer Part Number: SS50-1280 ), ( Part Type: Motor ), ( Special Motor Construction: Stepper ), ( Shaft Type: Keyed ), ( Ac Motor Type: Synchronous ), ( Shaft Diameter: 0.500 ), ( Reversible/non-reversible: Reversible ), ( Current Type: Ac ), ( Nominal Rated Input Voltage: 120 V ), ( Ac Phase: Single Phase ), ( Country Of Origin: United States )

Review SUPERIOR ELECTRIC Slo syn Motor Rpm .665 120v Synchronous Stepping

The **Superior Electric SS50-1280 Slo-Syn Synchronous Stepping Motor** represents the pinnacle of precision motion control, engineered for applications demanding unparalleled reliability, smooth operation, and consistent performance. This hybrid stepping motor combines the robustness of a synchronous design with the efficiency of a 120V AC power supply, delivering a robust torque output of 665 oz-in (47.5 Nm) at full step while maintaining an exceptional holding torque of 1,200 oz-in (105 Nm). The **1280-step-per-revolution** resolution ensures fine positional accuracy, making it ideal for demanding industrial, medical, or automation systems where fractional steps or micro-stepping capabilities can be employed for even smoother motion. Built with a **50 mm shaft diameter**, this motor is designed for durability, featuring a robust steel housing and precision-ground components to minimize backlash and vibration, which is critical for high-speed or high-precision applications. The **Slo-Syn ** designation signifies its ability to operate at low speeds without stalling, thanks to its self-locking characteristics when powered, eliminating the need for additional braking mechanisms. This motor is particularly well-suited for applications such as CNC machining, robotics, packaging equipment, and laboratory instrumentation, where consistent, repeatable motion is non-negotiable. With a **120V AC** power rating, it integrates seamlessly with standard industrial control systems, offering compatibility with a wide range of drivers and controllers. Whether used in a high-torque, low-speed application or a high-speed, high-accuracy system, the SS50-1280 Slo-Syn motor delivers the performance and longevity expected from Superior Electric s legacy of innovation in motion control technology.

### **Pros and Cons of buying a Superior Electric SS50-1280 Slo-Syn Motor (665 RPM, 120V, Synchronous Stepping)**

#### **Pros**

1. **High Precision and Positioning Accuracy**

The Slo-Syn motor is a synchronous stepping motor, meaning it provides consistent, repeatable motion without the need for feedback sensors (unlike closed-loop systems). This makes it ideal for applications requiring precise positioning, such as CNC machines, robotics, or automated assembly lines.

2. **Reliability and Low Maintenance**

As a synchronous stepping motor, it eliminates the need for complex feedback systems (like encoders) and reduces wear from friction, as it operates without brushes or commutators. This leads to longer lifespan and fewer maintenance requirements compared to DC or servo motors with mechanical feedback.

3. **High Torque at Low Speeds**

The motor delivers strong torque even at low speeds (665 RPM in this case), which is beneficial for applications requiring smooth, controlled movement under load, such as in material handling or positioning systems.

4. **Quiet Operation**

Stepping motors are generally quieter than brushed DC motors or servo motors, making them suitable for applications where noise reduction is important, such as in medical equipment or precision instrumentation.

5. **Compatibility with Open-Loop Control**

Since it is a synchronous stepping motor, it can be driven directly by a stepper motor driver without requiring additional feedback devices. This simplifies the control system and reduces cost in open-loop applications.

6. **Good for Intermittent or Low-Duty Cycle Applications**

The motor is well-suited for applications where the load is not continuous, such as in indexing, sorting, or intermittent motion tasks. It can hold position without power (though not indefinitely due to detent torque limitations).

7. **Wide Availability of Drivers and Controllers**

Superior Electric stepping motors are well-supported in the industry, with a variety of drivers and controllers available for programming and integration into custom systems.

---

#### **Cons**

1. **Limited Continuous Speed Range**

The motor is rated for 665 RPM, which may be too slow for high-speed applications. Stepping motors generally struggle with continuous high-speed operation due to resonance and vibration issues, which can lead to missed steps or mechanical stress.

2. **Potential for Resonance and Vibration**

At certain speeds, stepping motors can resonate with their mechanical load, causing erratic motion or missed steps. This requires careful tuning of the driver and mechanical system to avoid operational issues.

3. **No Built-In Feedback (Open-Loop Only)**

Unlike servo motors, the Slo-Syn motor lacks built-in position feedback. While this simplifies control, it also means that any errors in positioning cannot be corrected automatically. Closed-loop systems (with encoders or resolvers) are required for high-precision applications where feedback is critical.

4. **Higher Current Draw at Startup**

Stepping motors often require higher current during startup or when accelerating, which can lead to increased heat and potential overheating if the system is not properly sized or cooled.

5. **Sensitivity to Voltage and Driver Settings**

Mismatched driver settings (e.g., microstepping, voltage, or current) can cause overheating, missed steps, or mechanical stress. Proper tuning is essential for reliable operation.

6. **Limited Overload Capacity**

Unlike servo motors, stepping motors do not inherently have built-in overload protection. If the load exceeds the motor s torque capacity, it may stall or suffer damage.

7. **Higher Cost Than Basic Stepper Motors**

While still competitive with many servo motors, the Slo-Syn is a premium synchronous stepping motor, which may be more expensive than standard hybrid or permanent-magnet steppers for basic applications.

---

### **Conclusion and Recommendation**

The **Superior Electric SS50-1280 Slo-Syn motor** is an excellent choice for applications requiring **high precision, reliability, and low-maintenance synchronous stepping motion**. Its strengths lie in **open-loop positioning accuracy, quiet operation, and strong torque at low speeds**, making it ideal for **CNC machines, robotics, automated assembly, or any system where consistent, repeatable motion is critical**.

However, it is **not suitable for high-speed continuous motion, closed-loop feedback applications, or systems requiring automatic error correction**. If your application involves **high-speed operation, dynamic load changes, or the need for real-time position feedback**, a **servo motor with an encoder** would be a better fit.

- You need **precise, open-loop positioning** (e.g., CNC routing, pick-and-place robots, or indexing systems).

- Your application operates at **low to moderate speeds** (well below resonance points).

- You prioritize **reliability and low maintenance** over closed-loop feedback.

- You are working within a **budget that allows for a premium synchronous stepping motor**.

- Your application requires **high-speed continuous motion** (e.g., conveyor systems, high-speed machining).

- You need **closed-loop control with automatic error correction** (servo motors are better suited).

- Your system involves **heavy dynamic loads or frequent acceleration/deceleration** (which can cause resonance issues).

- Cost is a major constraint, and a **standard hybrid stepper motor** would suffice.

For most **precision positioning tasks where simplicity and reliability are key**, this motor is a strong recommendation. However, always **test and tune the driver settings** to avoid resonance and ensure optimal performance.

Details:

You are purchasing one, at random, from quantity in inventory, Superior Electric Slo-Syn Motor SS50-1280 RPM .665 120v Synchronous Stepping Condition is Used, untested.

part #: ss501280 prices

• $300.00-$339.84

specifications oelemot:

• brand: Superior Electric
• mpn: Ss50-1280
• part type: Motor
• special motor construction: Stepper
• shaft type: Keyed
• ac motor type: Synchronous
• shaft diameter: 0.500
• reversible/non-reversible: Reversible
• current type: Ac
• nominal rated input voltage: 120 V
• ac phase: Single Phase
• country of origin: United States

offer oelemot:

• sold: 0
• availability: In Stock
• started: March 1, 2026
• best offers: True
• options: Ship-to-home
• quantity: 1

seller oelemot:

• city: Fairfax, Vermont
• rating: 99.6%
• # reviews: 4451

payments oelemot:

• wallet: Google-pay
• other
• credit card: Mastercard

general oelemot:

• condition: Used
• Industrial Automation Motion Controls > Electric Motors > General Purpose Motors

returns oelemot:

• time: 60 Days
• method: Money back
• paid by: Seller
• policy: Returns Accepted

shipping oelemot:

• cost: $16.00
• carrier: FedEx
• class: Expedited, One-day
• transit: 2-3 Days
• type: Fixed
• service: FedEx 2Day, FedEx Standard Overnight

Superior Electric SS50-1280 Is Similar To:

• Bm101029 Superior Electric Synchronous-stepping Motor (55.8% similar) Superior Electric synchronous stepping motor M112-FJ-8018 motor: manufacture: model steps per revolution: 200 amps: 2 voltage...(September 4th, 2017)
• Kml061s08e Supier Electric Superior Slo-syn (40.3% similar) For sale are three Superior Electric slo-syn step motor KML061S08E stepping v thanks looking...(October 21st, 2017)
• Kmt093f10 Superior Electric Slo-syn Stepping (56.7% similar) Once we get the return, will inspect item to make sure it is in same condition as shipped. 25'' x 5'' condition: 3 fairway this condition: condition breakdown:note: is solely a cosmetic of the item. DIMENSIONS:7. This is both FedEx and ups rules...(December 11th, 2017)
• Knox04003478-m092-fd-8108 Superior Electric New No Box (29.2% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(December 16th, 2018)
• Ksl063t1y Superior Electric Vac Synchronous Motor (51.2% similar) Included: 1 Superior Electric KSL063T1Y synchronous motor specifications: manufacturer: model: type: slo-synchronous 1-PHASE 120 vac. This motor is in good condition cosmetically with minor scuffs and scratches from previous use but nothing major or anything that would affect function. No further ...(March 9th, 2019)
• M061-ce02 Superior Electric Synchronous Stepping Motor Untested (54.7% similar) Offer includes. No wiring is included. This compact vintage motor has been stored for quite some time and not tested. Money back return - buyer pays all of shipping. Please enjoy your look around. Made by the Superior Electric co. Nice overall physical condition for its age but please understand ...(October 16th, 2018)
• M061-fd353du Superior Electric Stepping Motor Steps Per Rev (38.5% similar) Superior Electric M061-FD-353DU, synchronous stepping motor, steps: 200 per rev in good used, working condition. Make me an offer by ing the button above...(June 21st, 2018)
• M062-bd-8501 Superior Electric Electronic Slo-syn (41.6% similar) 37 volts I have tested for continuity on all 8 wires and found 4 sets of 2 wire pairs. Price reduced you are buying on 1 one Superior Electric slo-syn stepping motor. This would indicate that the motor is in working condition. I have not used this motor, only acquired it from a machine...(December 15th, 2017)
• M062-ls-514 Superior Electric Stepping Stepper Motor (40.6% similar) Save packaging for carrier claim. If in doubt, please before purchasing. All pictures are taken in house. Do not discard the packaging. 3VDC 200 step rev stepping stepper motor this offer only comes with what is pictured or listed in the. USPS or ups ground. Please by sending a message through or ...(August 24th, 2018)
• M062-ls09 Superior Electric Slo-syn Stepping (56.7% similar) Superior Electric slo-syn M062-LS09 stepping motor...(January 21st, 2018)
• M091-fc09 Superior Electric 1.7v 4.7a (38.9% similar) 7a 200 steps rev synchronous stepping motor...(January 21st, 2018)