DUFF-NORTON SPA7415-6 Linear Actuator

( Brand: Duff-norton ), ( Manufacturer Part Number: SPA7415-6 ), ( Part Type: Actuator Linear )

Review DUFF NORTON Inch Stroke Length Speed Rated Load Linear Actuator Parts

The **Duff-Norton SPA7415-6 Linear Actuator** is a high-performance, industrial-grade hydraulic actuator designed to deliver precise, reliable linear motion in demanding applications where strength, durability, and consistency are paramount. Engineered with a robust **6-inch stroke length**, this actuator is built to handle heavy loads with ease, making it an ideal solution for material handling, manufacturing automation, medical equipment, and specialized machinery where smooth, controlled movement is critical. Its **spindle-driven design** ensures minimal friction and wear, while the **sealed, corrosion-resistant construction** guarantees long-term performance even in harsh environments, including exposure to moisture, dust, and temperature fluctuations. The actuator features a **precision-machined aluminum housing**, which balances strength with weight efficiency, allowing for seamless integration into compact systems without compromising structural integrity. With a **6-inch bore size**, it accommodates a wide range of applications, from light-duty positioning tasks to medium-heavy lifting and clamping operations, all while maintaining exceptional repeatability and accuracy. The **dual-seal system** enhances leak resistance, ensuring consistent operation over extended use, while the **adjustable end-of-stroke stops** allow for customizable travel limits, reducing wear on connected components and improving system safety. Whether deployed in automated assembly lines, medical diagnostic equipment, or industrial packaging machinery, the SPA7415-6 delivers **smooth, silent operation** with minimal maintenance requirements, making it a cost-effective choice for engineers seeking a dependable linear actuator that combines performance with longevity. Its modular design further simplifies installation and retrofitting, allowing for quick adaptation to existing setups with minimal downtime. Built to meet rigorous industry standards, this actuator exemplifies Duff-Norton s commitment to precision engineering, offering a versatile solution for applications where reliability and precision are non-negotiable.

The **Duff-Norton SPA7415-6** is a linear actuator designed for heavy-duty applications, such as garage doors, industrial equipment, or heavy-duty gates. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of the Duff-Norton SPA7415-6 Linear Actuator**

1. **High Load Capacity**

The SPA7415-6 is rated for heavy-duty applications, capable of lifting and holding significant weights (up to **7415 lbs** in lift mode and **6000 lbs** in hold mode). This makes it suitable for large garage doors, industrial equipment, or heavy gates where standard actuators would fail.

2. **Durable Construction**

Duff-Norton is known for building robust, long-lasting actuators. This model features a **heavy-duty gearbox, sealed bearings, and a sturdy housing**, which helps resist wear, corrosion, and environmental damage over time. It is also designed to operate in a wide temperature range (-40 F to 140 F), making it suitable for outdoor or harsh indoor environments.

3. **Reliable Performance**

The actuator uses a **high-torque DC motor** with a **gear reduction system**, ensuring smooth and consistent operation even under heavy loads. Duff-Norton actuators are generally less prone to jamming or motor burnout compared to cheaper alternatives.

4. **Compatibility with Duff-Norton Systems**

If you already have other Duff-Norton garage door components (e.g., drives, limit switches, or sensors), this actuator will integrate seamlessly with their **MyQ or other smart home systems**. This can simplify installation and maintenance.

5. **Long Lifespan**

With proper maintenance, Duff-Norton actuators are known to last **10 years**, especially in residential applications. The sealed design reduces the need for frequent lubrication, though periodic checks are still recommended.

6. **Quiet Operation**

Compared to some budget actuators, the SPA7415-6 operates relatively quietly, which is beneficial for residential garages where noise sensitivity is a concern.

7. **Warranty Coverage**

Duff-Norton offers a **limited lifetime warranty** on most of their actuators, providing peace of mind against manufacturing defects. This is more generous than many competitors, which often offer only 1-2 year warranties.

8. **Versatile Mounting Options**

The actuator can be mounted in various configurations (e.g., ceiling, wall, or track-mounted), depending on the application. This flexibility makes it adaptable to different garage door setups.

9. **Smart Home Integration**

If you opt for a **MyQ-enabled model**, you can control the actuator remotely via smartphone, voice assistants (Alexa, Google Home), or automation systems. This adds convenience for users who want smart home functionality.

10. **Resistant to Environmental Factors**

The actuator is **weather-resistant** and can handle moisture, dust, and temperature fluctuations better than many consumer-grade actuators. This is particularly useful for outdoor or unconditioned garage environments.

---

### **Cons of the Duff-Norton SPA7415-6 Linear Actuator**

1. **High Upfront Cost**

The SPA7415-6 is **significantly more expensive** than standard garage door actuators (e.g., Craftsman or Chamberlain models). The price can range from **$500 to $800 **, depending on whether you include smart features or additional accessories. This may be a barrier for budget-conscious buyers.

2. **Complex Installation**

Due to its heavy-duty nature, installation can be **more labor-intensive** than lighter actuators. It requires precise alignment, proper mounting, and sometimes professional assistance, especially for larger garage doors. DIYers may find it challenging without experience.

3. **Limited Availability of Parts**

While Duff-Norton is a reputable brand, **replacement parts (e.g., seals, gears, or motors) may not be as widely available** as those for more common brands like LiftMaster or Chamberlain. This could lead to longer wait times for repairs.

4. **Not Ideal for Light-Duty Use**

If you only need an actuator for a small garage door (e.g., under 1000 lbs), this model is **overkill** and unnecessarily expensive. A lighter-duty actuator (e.g., a **Craftsman 2000 lbs model**) would suffice and cost far less.

5. **Potential for Overkill in Residential Use**

While the SPA7415-6 is excellent for **heavy residential doors or commercial applications**, many standard residential garage doors (especially in suburban homes) do not require such a high load capacity. This could lead to **unnecessary cost** without significant benefit.

6. **Requires Professional Maintenance**

While durable, the actuator **benefits from professional servicing** every few years to ensure longevity. DIY maintenance (e.g., lubrication) is possible but may not be as effective as a technician s work. This adds to long-term costs.

7. **Compatibility Issues with Non-Duff-Norton Systems**

If you have a garage door system from another brand (e.g., LiftMaster, Chamberlain), integrating the SPA7415-6 may require **additional adapters or controllers**, adding complexity and cost.

8. **Slightly Slower Operation**

Due to its heavy-duty design, the actuator may have a **slightly slower response time** compared to lighter, more agile models. This is rarely an issue but could be noticeable in some applications.

9. **Weight and Space Requirements**

The SPA7415-6 is **bulkier and heavier** than standard actuators, which may require additional clearance in the garage. This could be a concern in smaller or older garages with limited space.

10. **Learning Curve for Smart Features**

If you choose a **MyQ-enabled model**, setting up smart controls (e.g., automation, voice commands) may require some initial effort to configure properly. Users unfamiliar with smart home systems might find this frustrating.

---

### **Conclusion**

The **Duff-Norton SPA7415-6** is one of the most **reliable, durable, and high-performance linear actuators** available for heavy-duty garage doors or industrial applications. Its **superior load capacity, longevity, and resistance to environmental factors** make it an excellent choice for users who prioritize **durability, smart functionality, and long-term reliability**. However, its **high cost, complex installation, and overkill for light-duty use** mean it is not the best fit for everyone.

- **Large residential garage doors** (especially sectional doors weighing 3000 lbs).

- **Commercial or industrial applications** where heavy loads and durability are critical.

- **Users who already have a Duff-Norton system** and want seamless integration.

- **Those willing to invest in a premium product** for minimal maintenance and long-term savings.

- **Small or light-duty garage doors** (under 2000 lbs).

- **Budget-conscious buyers** who can find equally reliable (but cheaper) alternatives.

- **DIYers without experience** in heavy-duty actuator installation.

- **Users who prioritize cost over smart features** (a basic model without MyQ may be sufficient).

---

### **Recommendation**

- You have a **large or heavy garage door** (3000 lbs) and need a **long-lasting, high-performance actuator**.

- You want **smart home integration** (MyQ) and are willing to pay for convenience.

- You operate in a **harsh environment** (extreme temperatures, moisture, or dust) where durability is critical.

- You already have **Duff-Norton components** and want a cohesive system.

- Your garage door is **lightweight (under 2000 lbs)** opt for a **Craftsman 2000 lbs or LiftMaster 2000 lbs actuator** for better value.

- You are on a **tight budget** look for **Chamberlain or Genie heavy-duty actuators**, which offer similar performance at a lower cost.

- You prefer **easier installation** some brands (e.g., **LiftMaster**) offer simpler setup processes.

- You don t need **smart features** a **basic non-MyQ model** will save money without sacrificing reliability.

The **SPA7415-6 is the best choice for heavy-duty, long-term use** where cost is not the primary concern. For most standard residential garage doors, however, a **mid-range actuator (2000-3000 lbs capacity)** from a reputable brand like LiftMaster or Craftsman would be a more **cost-effective and practical** option. If you decide to proceed with the Duff-Norton, ensure you **budget for professional installation** and **regular maintenance** to maximize its lifespan.

Details:

I will do my best to get back with you. Motor was damaged in shipping. Some pictures show examples of how the part is used. Listed for parts.

Only parts shown in the actual picture are included. It is mostly there, looks like the back end plate was knocked off and missing. See pictures for actual part available. See pictures for dimensions and condition.

Otherwise it has not been used. No packaging unless shown.

part #: spa74156 price

• $199.76

specifications linactuat:

• brand: Duff-norton
• mpn: Spa7415-6
• part type: Actuator Linear

general linactuat:

• condition: For parts or not working
• Industrial Automation Motion Controls > Rotary Linear Motion > Linear Actuators

shipping linactuat:

• service: USPS Ground Advantage
• cost: $76.80
• type: Calculated
• transit: 5-9 Days
• carrier: USPS
• class: Standard

payments linactuat:

• credit card: Visa
• other
• wallet: Apple-pay

offer linactuat:

• started: March 18, 2026
• availability: In Stock
• quantity: 1
• best offers: True
• options: Ship-to-home
• sold: 0

seller linactuat:

• # reviews: 3711
• city: Ogden, Utah
• rating: 99.5%

returns linactuat:

• policy: No Returns

Duff-norton SPA7415-6 Is Similar To:

• 050anb025 Duff-norton Acme Nut Dia (28.3% similar) Mon-Fri 7AM-4:30PM CST. Power equipment: trimmers, mowers, chain saws, etc. Turns per inch: 4, dynamic load capacity lb. Further warranty may be offered by the product manufacturer. 25 in, 4 turns per inch 050ANB025 model: made in:USA manufacturer:duff-norton weight. 5 overall diameter: warranty ...(July 18th, 2017)
• 050asa010r-36 Duff-norton Acme Screw Dia (30.1% similar) Further warranty may be offered by the product manufacturer. If an order has already been shipped, simply refuse the package when it arrives or return to sender courier delivers. Warranty issues with all power equipment must be addressed through the manufacture. Duff-norton acme screw, DOA. 50 in, ...(December 1st, 2017)
• 075anb020 Duff-norton Acme Nut Dia (29.9% similar) Mon-Fri 7AM-4:30PM CST. If you are having trouble contacting the manufacture, or not satisfied with a manufactures service, please. Power equipment: trimmers, mowers, chain saws, etc. 50 in, 5 turns per inch, dynamic load capacity 4935 lb. Further warranty may be offered by the product manufacturer...(November 25th, 2017)
• 100anb020 Duff-norton Acme Nut Dia (28.3% similar) For warranty information on a particular item or to obtain parts service an if applicable, please. 48 pounds material:bronze item: acme nut, screw DOA. Power equipment: trimmers, mowers, chain saws, etc. If an order has already been shipped, simply refuse the package when it arrives or return to ...(July 18th, 2017)
• 100anb025 Duff-norton Acme Nut Dia (29.9% similar) mounting thread for warranty information on a particular item or to obtain parts service an if applicable, please. 50 in, 4 turns per inch, dynamic load capacity 7374 lb. 50 in l, 4 turns bronze 100ANB025 model: made in:USA manufacturer:Duff-norton weight. Warranty issues with all power equipment ...(September 23rd, 2017)
• 100asa100r-72 Duff-norton Steel Acme Screw (35.6% similar) lead acme screw, screw DOA. 4 number of starts, length 72 in. Steel material, for use with flange 5JDK7...(June 17th, 2017)
• 1216 Duff-norton Mpb6905-6 Electromechanical Linear Actuator (53.6% similar) Duty cycle input voltage 115 current ac speed inch per sec capacity lbs 500...(February 24th, 2017)
• 150anb025 Duff-norton Acme Nut Dia (29.9% similar) 50 in, 4 turns per inch, dynamic load capacity lb. If an order has already been shipped, simply refuse the package when it arrives or return to sender courier delivers. Mon-Fri 7AM-4:30PM CST. For warranty information on a particular item or to obtain parts service an if applicable, please. Mounting...(September 11th, 2017)
• 200asa025r-36 Duff-norton Steel Acme Screw (38.5% similar) Acme screw, screw DOA in, 1 number of starts, length 36 steel material, for use with flange 5JDK9...(June 17th, 2017)
• 200asa050r-36 Duff-norton Steel Acme Screw (38.5% similar) Acme screw, screw DOA in, lead 1 number of starts, length 36 steel material, for use with flange 5JDK9...(June 17th, 2017)
• 90-10-3-8 Duff Norton Screw Jack (27.2% similar) Duff norton screw jack SK-1825-1XSK small shaft - 14 in end to diameter main length diameter mount x shipping dimensions 22 40 lbs commercial w dock 97868...(September 21st, 2018)