SMC CDLABN40-120-E Pneumatic Cylinder Descr CLA40-E

( Brand: Smc ), ( Manufacturer Part Number: CDLABN40-120-E ), ( Part Type: Pneumatic Cylinder )

Review SMC Pneumatic Cylinder Psi Untested Read Descr

The **SMC CDLABN40-120-E pneumatic cylinder (CLA40-E series, 72 mm bore)** is a high-performance, robust actuator designed for demanding industrial applications requiring precision, reliability, and durability. Part of SMC s renowned **CLA40-E** line, this double-acting, rod-extending pneumatic cylinder is engineered to deliver consistent force and smooth motion across a wide range of industries, including automation, packaging, material handling, and assembly lines. With a **72 mm bore diameter**, it generates a substantial **120 mm stroke length**, making it ideal for medium-duty applications where compact yet powerful actuation is essential. The cylinder features a **standard 1/4" NPT port connection**, ensuring compatibility with SMC s extensive range of pneumatic components, including valves, fittings, and control systems, for seamless integration into automated processes.

Constructed from **high-grade aluminum alloy**, the CDLABN40-120-E cylinder offers an optimal balance of strength and weight, reducing overall system inertia while maintaining structural integrity under repeated cycling. Its **sealed, corrosion-resistant design** ensures longevity in environments exposed to dust, moisture, or mild chemical contaminants, making it suitable for both cleanroom and industrial settings. The cylinder incorporates **SMC s advanced sealing technology**, utilizing high-performance elastomers and precision-machined components to minimize leakage, friction, and wear, thereby enhancing efficiency and reducing maintenance requirements. The **double-acting operation** provides bidirectional force, allowing for controlled extension and retraction, which is critical for applications requiring precise positioning, clamping, or indexing.

For enhanced safety and operational flexibility, the CDLABN40-120-E is equipped with **SMC s patented CLA40-E rod end design**, featuring a **threaded rod connection** that ensures secure attachment to end-of-stroke cushions, buffers, or custom mounts. This modular approach allows for easy customization, enabling the integration of **air cushions** to dampen impact and extend cylinder life, or **mechanical stops** for precise end-of-travel control. The cylinder s **standardized mounting flanges** (compatible with SMC s **CLA40-E series**) simplify installation, while its **compact profile** maximizes workspace efficiency in tight machinery layouts. Additionally, the **low-friction piston rod** and **optimized guide bushings** reduce energy consumption and operational noise, contributing to a quieter, more energy-efficient pneumatic system.

SMC s rigorous quality assurance processes ensure that each CDLABN40-120-E cylinder undergoes **strict testing for pressure, leakage, and endurance**, guaranteeing reliable performance under continuous operation. The cylinder s **universal compatibility** with SMC s pneumatic control systems such as proportional valves, pressure regulators, and digital controllers enables seamless integration into both traditional and advanced automation setups. Whether deployed in high-speed packaging machines, robotic assembly systems, or material transport applications, this cylinder delivers **consistent, repeatable motion** with minimal downtime. Its **maintenance-friendly design** further reduces operational costs, as internal components are easily accessible for servicing, and the absence of complex lubrication requirements simplifies upkeep. Overall, the **SMC CDLABN40-120-E pneumatic cylinder** represents a versatile, high-quality solution for industries demanding precision, durability, and efficiency in their pneumatic actuation needs.

### **Overview of the SMC CDLABN40-120-E Pneumatic Cylinder (CLA40-E, 72 mm Rod Diameter)**

The **SMC CDLABN40-120-E** is a **double-acting, rod-end pneumatic cylinder** with a **40 mm bore, 72 mm rod diameter, and a 120 mm stroke**. It belongs to the **CLA40-E series**, which is part of SMC s **standard pneumatic cylinder line**, known for reliability, precision, and compatibility with industrial automation systems.

Below is a detailed analysis of its **pros and cons**, followed by a **conclusion and recommendation**.

---

### **Pros of the SMC CDLABN40-120-E**

1. **High Quality and Reliability**

- SMC is a globally recognized brand with decades of experience in pneumatic automation. Their cylinders are engineered for **durability, consistent performance, and low maintenance**.

- The **CLA40-E series** is part of their **standard product line**, meaning it undergoes rigorous testing for **wear resistance, leak prevention, and operational stability**.

2. **Precision and Repeatability**

- The cylinder features **tight tolerances** in manufacturing, ensuring **consistent stroke length and positioning accuracy**, which is critical in **automation, packaging, and material handling applications**.

- The **double-acting design** allows for **controlled extension and retraction**, reducing energy waste compared to single-acting cylinders.

3. **Compatibility with SMC s Pneumatic System**

- The cylinder is **designed to integrate seamlessly** with SMC s **valves, regulators, and control systems**, making it ideal for **custom automation setups**.

- SMC provides **comprehensive documentation**, including **mounting instructions, wiring diagrams (if electric), and technical specifications**, simplifying installation and troubleshooting.

4. **Standardized and Easy to Source**

- Being a **standard model**, it is **widely available** from authorized SMC distributors, reducing lead times.

- Replacement parts (seals, rods, end caps) are **readily accessible**, lowering long-term maintenance costs.

5. **Versatile Mounting Options**

- The cylinder supports **multiple mounting styles** (clevis, trunnion, foot, flange, etc.), allowing flexibility in **integration with different machinery**.

- The **72 mm rod diameter** provides **sufficient strength** for moderate to heavy-duty applications without excessive weight.

6. **Energy Efficiency**

- Double-acting cylinders **use compressed air efficiently** by controlling both extension and retraction, unlike single-acting cylinders that rely on springs or gravity.

- SMC s **low-friction piston design** minimizes air consumption, reducing operational costs.

7. **Good Speed Control Capability**

- The cylinder can be paired with **flow control valves** to adjust **extension/retraction speed**, making it suitable for **high-speed automation** where precise timing is required.

8. **Corrosion Resistance (Standard Model)**

- The **CLA40-E** is typically **zinc-plated or painted** for basic corrosion protection, adequate for **indoor or clean-room environments**.

- For **harsh conditions**, SMC offers **special coatings (e.g., stainless steel or epoxy)**, though this may increase cost.

9. **Cost-Effective for Standard Applications**

- Compared to **custom or high-end cylinders**, this model offers **good performance at a reasonable price**, making it a **cost-effective choice** for many industrial needs.

10. **Warranty and Support**

- SMC provides **standard warranties** (typically **1-2 years**) and **technical support**, ensuring peace of mind for buyers.

---

### **Cons of the SMC CDLABN40-120-E**

1. **Limited Stroke Length for Heavy-Duty Applications**

- The **120 mm stroke** may be **insufficient** for applications requiring **longer travel distances** (e.g., large-scale material handling, heavy-duty presses).

- For such cases, **longer-stroke cylinders (e.g., 200 mm or more)** would be necessary, potentially increasing cost.

2. **Not Ideal for Extreme Environments**

- The **standard CLA40-E** is **not designed for high-temperature, high-humidity, or corrosive environments** without additional modifications.

- **Stainless steel or special coatings** would be required for **outdoor, chemical, or food-processing applications**, adding expense.

3. **Dependence on Compressed Air Quality**

- Poor-quality compressed air (**moisture, oil, debris**) can **reduce cylinder lifespan** by accelerating wear on seals and internal components.

- Requires **proper filtration and drying systems** upstream, which may not always be present in all setups.

4. **Standard Size Constraints**

- The **40 mm bore and 72 mm rod** limit **force output** ( **1,200 N at 6 bar**). For **higher force applications**, larger cylinders (e.g., **50 mm bore or more**) would be needed.

- If the application requires **extreme precision or force**, a **custom or high-precision cylinder** may be necessary.

5. **Potential for Leakage Over Time**

- Like all pneumatic cylinders, **seals degrade** with **high-frequency cycling or exposure to contaminants**, leading to **air leaks**.

- Regular **maintenance and seal replacement** is required to prevent performance degradation.

6. **Limited Customization Options**

- The **CLA40-E series is a standard design**, meaning **custom modifications (e.g., special rod coatings, integrated sensors)** may require **additional costs or third-party solutions**.

- For **unique applications**, a **custom cylinder** might be more appropriate.

7. **Noise and Vibration in High-Speed Applications**

- At **high operating speeds**, pneumatic cylinders can generate **noise and vibration**, which may require **damping solutions** (e.g., snubbers, rubber mounts).

- This is more of an **operational consideration** than a hardware limitation but can affect **workplace ergonomics**.

8. **Higher Initial Cost Than Basic Alternatives**

- While **cost-effective for standard use**, it may be **more expensive** than **basic, non-branded cylinders** from lesser-known manufacturers.

- However, the **long-term reliability** often justifies the higher upfront cost.

9. **Requires Proper Installation and Alignment**

- **Misalignment or improper mounting** can lead to **premature wear, seal failure, or reduced stroke efficiency**.

- **Incorrect piping or valve setup** can cause **air pressure fluctuations**, affecting performance.

10. **Not Suitable for Vacuum or High-Vacuum Applications**

- This is a **standard pneumatic cylinder** and **cannot operate in vacuum conditions** without modifications.

- For **vacuum applications**, specialized cylinders (e.g., **SMC s VAC series**) would be required.

---

### **Conclusion**

The **SMC CDLABN40-120-E pneumatic cylinder** is a **well-engineered, reliable, and cost-effective solution** for **standard industrial automation applications** where **precision, repeatability, and compatibility with SMC s ecosystem** are priorities.

- **Automation and robotics** (packaging, material handling).

- **Moderate-force applications** (clamping, positioning, light-duty presses).

- **Environments with controlled air quality** (clean rooms, indoor manufacturing).

- **Setups requiring SMC valve and control system integration**.

- **Longer strokes or higher forces** are needed (consider larger cylinders).

- **Extreme environmental conditions** (corrosion, high temperatures) are present (special coatings or materials required).

- **Custom modifications** (e.g., integrated sensors, unique mounting) are necessary (may need a custom cylinder).

- **Budget constraints** are tight (basic, non-branded cylinders may suffice for simple applications).

---

### **Recommendation**

You need a **reliable, high-quality cylinder** for **standard automation tasks**.

Your application requires **precise positioning and repeatability**.

You are already using **SMC s pneumatic system** (valves, regulators, controls).

The **40 mm bore and 120 mm stroke** meet your **force and travel distance requirements**.

Your environment is **indoor or clean**, with **proper air filtration**.

You need **longer strokes or higher forces** (e.g., **SMC CDL50 series or larger**).

Your application involves **harsh conditions** (consider **stainless steel or coated cylinders**).

You require **custom features** (e.g., **built-in sensors, special rod coatings**).

**Cost is a major concern** (evaluate **basic pneumatic cylinders** from other brands).

The **SMC CDLABN40-120-E is a strong, well-supported choice** for **most standard pneumatic applications** where **reliability and integration with SMC s ecosystem** are important. If your requirements align with its specifications, it is a **safe and practical purchase**. However, if your application has **unique or extreme demands**, a **custom or larger cylinder** may be more appropriate.

Details:

Units may show cosmetic wear and blemishes from industrial use storage. Rod moves smoothly by hand with firm internal resistance. Selling for parts as-is. No crunching or grinding when moving rod.

These units have been given a very basic cleaning, but may arrive needing more. No obvious signs of bent rods or Internal breakage. Cylinders have not been tested under compressed air.

part #: cdlabn40120 prices

• $45.55-$129.99

specifications hydraulicylind:

• brand: Smc
• mpn: Cdlabn40-120-e
• part type: Pneumatic Cylinder

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• policy: No Returns

seller hydraulicylind:

• # reviews: 1465
• rating: 99.8%
• city: Sevierville, Tennessee

general hydraulicylind:

• condition: For parts or not working
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Pneumatic Cylinders

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• transit: 3-8 Days
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• carrier: USPS, UPS
• class: Standard
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offer hydraulicylind:

• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: May 18, 2026
• sold: 0

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