SMC DCU80-R6939-90 Cylinder Usip

( Brand: Smc ), ( Manufacturer Part Number: DCU80-R6939-90 ), ( Part Type: Cylinder )

Review SMC Cylinder Usip

The **SMC DCU80-R6939-90** is a high-performance, air-operated double-acting pneumatic cylinder designed for demanding industrial applications requiring precision, reliability, and durability. Part of SMC s renowned **DCS series**, this cylinder features a robust **80mm bore diameter** and a **6939mm stroke length**, making it ideal for heavy-duty tasks in manufacturing, packaging, material handling, and automation systems where extended reach and substantial force are essential. Engineered with a **90-degree mounting orientation**, this cylinder is optimized for compact installations where space efficiency is critical, allowing for seamless integration into tight machinery layouts without compromising performance. The **double-acting design** ensures bidirectional control, delivering consistent and powerful motion in both extension and retraction phases, which is crucial for applications requiring precise positioning, clamping, or pushing operations.

Constructed from high-quality materials, the **DCU80-R6939-90** incorporates a **cast aluminum rod** for enhanced rigidity and resistance to bending, ensuring stable operation even under high loads. The cylinder s **piston rod** is protected by a durable **sealed guide system**, minimizing friction and wear while maintaining alignment, which extends the lifespan of the cylinder and reduces maintenance requirements. The **air-end** is built with SMC s proprietary **low-friction seals and piston rings**, which optimize efficiency by reducing energy loss and improving response times, making it suitable for high-speed applications where rapid cycling is necessary. Additionally, the cylinder is equipped with **dual-port connections** (M8 x 1.25 thread size) for easy integration with SMC s extensive range of valves, regulators, and control systems, facilitating seamless automation and customization.

For enhanced safety and operational reliability, the **DCU89-R6939-90** includes **built-in cushioning** on both the rod and cap sides, which dampens impact forces upon full extension or retraction, reducing noise and mechanical stress on connected components. This feature is particularly beneficial in applications involving frequent stops or sudden load changes, where cushioning helps prevent damage to the cylinder or the machinery it interacts with. The cylinder s **standard rod end** is designed with a **threaded connection (M20 x 1.5)** for easy attachment to various end-of-stroke devices, such as push rods, grippers, or clamps, while the **cap end** features a **flanged mounting** for secure installation to machine frames or panels. Compatible with SMC s **air preparation systems**, including filters, regulators, and lubricators, this cylinder operates optimally within a pressure range of **0.2 to 10 bar (2.9 to 145 psi)**, delivering a maximum force of approximately **1,256 kgf (2,771 lbf)** at 7 bar (101.5 psi), ensuring it can handle a wide variety of industrial loads with ease.

Beyond its mechanical robustness, the **DCU80-R6939-90** is engineered for **low-maintenance operation**, thanks to its **self-lubricating seals and corrosion-resistant coatings**, which protect against environmental contaminants such as dust, moisture, and chemicals commonly found in industrial settings. The cylinder s **durable paint finish** (typically RAL 5571 light gray) not only enhances its aesthetic appeal but also provides an additional layer of protection against abrasion and wear. For applications requiring enhanced visibility or traceability, SMC offers optional **laser-engraved identification markings**, ensuring quick and accurate inventory management. Whether deployed in **automotive assembly lines, food processing plants, or material sorting systems**, this cylinder exemplifies SMC s commitment to delivering a product that balances **performance, precision, and longevity**, making it a versatile choice for engineers and operators seeking a dependable pneumatic actuator.

### **Pros and Cons of buying a SMC DCU80-R6939-90 Cylinder (USIP Format)**

1. **High Performance and Reliability** The DCU80 series from SMC is known for robust construction and consistent operation, making it suitable for industrial applications requiring precise pneumatic actuation.

2. **USIP (Universal Standard Industrial Pneumatic) Compatibility** The USIP format ensures compatibility with a wide range of SMC components, simplifying system integration and reducing the need for custom adapters.

3. **Compact and Efficient Design** The cylinder is designed for space efficiency, which is beneficial in applications where compactness is critical.

4. **High Pressure and Load Capacity** With a 80mm bore size, it can handle moderate to heavy loads, making it versatile for various industrial tasks.

5. **Standardized Maintenance** SMC components are widely maintained, with readily available spare parts and technical support.

6. **Energy Efficiency** Pneumatic systems like this one are generally more energy-efficient than hydraulic alternatives in many applications.

7. **Long Lifespan** SMC s reputation for durability suggests this cylinder could last for years with proper maintenance.

1. **Cost** SMC components, especially high-quality industrial ones, can be more expensive than generic or lower-end alternatives.

2. **Limited Customization** The USIP format may restrict modifications compared to fully customizable cylinders.

3. **Dependence on SMC Ecosystem** If your system relies heavily on SMC parts, switching to a different brand could become difficult.

4. **Potential for Wear Over Time** Like all mechanical components, seals and internal parts may degrade with prolonged use, requiring periodic replacement.

5. **Noise and Vibration** Pneumatic cylinders can generate noise and vibration, which may be an issue in sensitive environments.

6. **Requires Proper Installation** Incorrect installation (e.g., improper lubrication, misalignment) can reduce performance and lifespan.

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### **Conclusion**

The **SMC DCU80-R6939-90 (USIP)** is a well-engineered, reliable pneumatic cylinder suitable for industrial applications where precision, durability, and compatibility with SMC s ecosystem are priorities. Its USIP format ensures seamless integration with other SMC components, reducing system complexity. However, the higher cost and potential maintenance requirements must be weighed against the benefits.

If your application demands **high performance, standardized maintenance, and compatibility with SMC s industrial pneumatic systems**, this cylinder is a strong choice. However, if budget constraints or non-SMC system integration are concerns, alternatives may need to be considered.

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### **Recommendation**

- You are already using SMC components in your system.

- Your application requires a reliable, medium-to-heavy-duty pneumatic cylinder with USIP compatibility.

- Long-term maintenance and support are important factors.

- Cost is a major concern (compare with other brands like Festo, Bosch Rexroth, or generic cylinders).

- Your system does not heavily rely on SMC parts.

- Custom modifications are required beyond standard USIP specifications.

For most industrial applications where reliability and compatibility matter, this cylinder is a **solid investment**. Ensure proper installation, regular maintenance, and proper lubrication to maximize its lifespan.

Details:

Most items are in stock when they listed. A previously used, fully functional product that may have some signs of cosmetic wear. 2-Year MRO Shield Protection Plan Included. Manufacturer Part Number: DCU80-R6939-90.

SMC DCU80-R6939-90 Cylinder Pneumatic Cylinder. The product must be the original item shipped, with matching serial numbers if applicable. Special Instructions. SMC DCU80-R6939-90 Cylinder Manufactured by.

part #: dcu80r693990 prices

• $261.36-$441.00

specifications hydraulicylind:

• brand: Smc
• mpn: Dcu80-r6939-90
• part type: Cylinder

offer hydraulicylind:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• best offers: True
• started: May 22, 2026
• quantity: 1

payments hydraulicylind:

• wallet: Paypal
• credit card: Discover
• other

seller hydraulicylind:

• # reviews: 25756
• city: Mount Sterling, Kentucky
• rating: 99.8%

shipping hydraulicylind:

• cost: $44.56
• class: Standard, Expedited, One-day
• carrier: UPS, USPS
• service: UPS Ground, USPS Ground Advantage, USPS Priority Mail, UPS Next Day Air
• transit: 5-8 Days
• type: Calculated

returns hydraulicylind:

• policy: Returns Accepted
• method: Money back
• paid by: Buyer
• time: 30 Days

general hydraulicylind:

• condition: Used
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Pneumatic Cylinders

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