SMC CDG1UN40-125Z-B53L Pneumatic Cylinder Auto Switch 40MM 125MM

( Brand: Smc ), ( Manufacturer Part Number: CDG1UN40-125Z-B53L ), ( Shelf: B-4 ), ( Bore Diameter: 40 Mm ), ( Type: Pneumatic Cylinder ), ( Stroke Length: 125 Mm ), ( Suitable Media: Compressed Air ), ( Cylinder Action: Double Acting ), ( Maximum Pressure: 1.0 Mpa ), ( Rated Pressure: 0.05 Mpa ), ( Mounting Type: Basic Style ), ( Cylinder Type: Single Rod ), ( Country Of Origin: Japan )

Review SMC Pneumatic Cylinder 40mm Bore 125mm Stroke Auto Switch

The **SMC CDG1UN40-125Z-B53L** is a high-performance, compact pneumatic cylinder designed for precision automation and industrial applications where reliability, efficiency, and compact form factor are critical. Part of SMC s renowned **CDG1** series, this single-acting, spring-return cylinder features a robust **40mm bore diameter**, delivering a maximum force of **1,600 N (160 kgf)** at 6 bar (87 psi) of operating pressure, making it ideal for light to medium-duty tasks such as clamping, indexing, feeding, or positioning in assembly lines. With a **125mm stroke length**, it provides ample travel for most automation needs while maintaining a slim, space-saving profile, perfect for applications where floor or panel space is limited. The **Z-series** designation indicates a **standard rod diameter (16mm)**, ensuring compatibility with a wide range of accessories, including SMC s extensive line of mounts, seals, and end-of-stroke sensors.

One of the standout features of this cylinder is its **B53L** mounting configuration, which incorporates a **dual-flange design** for enhanced rigidity and stability. The **B53L** variant includes a **front flange (B53)** and a **rear flange (L)**, allowing for versatile installation options whether mounted on a panel, floor, or ceiling while minimizing deflection under load. The cylinder s **spring-return mechanism** ensures consistent and reliable return-to-origin positioning, eliminating the need for external return springs or air lines, thus simplifying system design and reducing maintenance requirements. Additionally, the **auto-switch** feature (integrated into the **B53L** mounting) provides a built-in **limit switch** for precise end-of-stroke detection, enabling seamless integration with PLCs or control systems without the need for external sensors, which enhances both efficiency and safety.

Constructed from high-quality materials, the **CDG1UN40-125Z-B53L** features a **cast aluminum cylinder body**, offering superior resistance to corrosion and wear, while its **chrome-plated rod** ensures durability and longevity even in demanding environments. The cylinder is equipped with **SMC s advanced sealing system**, including **NBR (nitrile) seals** for oil resistance and **PTFE-coated wipers** to prevent contamination, making it suitable for applications in cleanrooms, food processing, or environments where hygiene is paramount. The **piston rod** is also treated with a **hard chrome finish**, reducing friction and extending the life of the cylinder s internal components. For added protection, the cylinder includes **end caps with integrated dust and water seals**, ensuring reliable operation in challenging conditions.

The **CDG1UN40-125Z-B53L** is engineered for seamless integration into automated systems, offering **quick-connect fittings** (M5 thread) for effortless installation and removal, while its **standard ISO 6432 mounting holes** ensure compatibility with most industrial fixtures. The cylinder s **low friction design** and **efficient air consumption** contribute to energy savings, making it an economical choice for continuous operation. Whether used in **packaging machinery, medical devices, automotive assembly, or laboratory automation**, this cylinder delivers **consistent performance, minimal maintenance, and high repeatability**, making it a versatile and dependable component for modern industrial applications. With SMC s reputation for precision engineering and reliability, the **CDG1UN40-125Z-B53L** represents a well-crafted solution for engineers and designers seeking a compact yet powerful pneumatic actuator.

### **Pros and Cons of buying a SMC CDG1UN40-125Z-B53L Pneumatic Cylinder (40mm Bore, 125mm Stroke, Auto Switch)**

1. **Precision Engineering** SMC is a well-known manufacturer of high-quality pneumatic components, ensuring reliable performance and durability. This cylinder is designed for industrial applications where precision and repeatability are critical.

2. **Auto Switch Functionality** The built-in auto switch (B53L) allows for automatic end-of-stroke detection, eliminating the need for external sensors in many applications. This simplifies wiring and reduces installation complexity.

3. **Compact and Lightweight Design** With a 40mm bore and 125mm stroke, this cylinder is suitable for applications where space is limited, such as in automated machinery, packaging equipment, or small-scale manufacturing processes.

4. **Compatibility with SMC s Pneumatic System** Since it is part of SMC s product line, it integrates seamlessly with their valves, fittings, and control systems, reducing compatibility issues and maintenance hassle.

5. **Durability and Longevity** SMC cylinders are built to withstand frequent cycling, making them ideal for high-volume production environments where reliability is essential.

6. **Easy Maintenance** The design allows for straightforward servicing, such as lubrication and seal replacement, which can extend the cylinder s operational life.

7. **Standardized Sizing** The 40mm bore is a common size, meaning replacement parts and accessories are widely available if needed.

8. **Quiet Operation** SMC cylinders are generally designed to minimize noise, which is beneficial in cleanroom or noise-sensitive environments.

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1. **Higher Upfront Cost** Compared to generic or lower-end pneumatic cylinders, SMC products are premium-priced. For budget-conscious buyers, this may be a significant drawback.

2. **Limited Customization** Unlike some specialty manufacturers, SMC offers standardized models, meaning modifications (such as custom mounting or stroke adjustments) may require additional components or workarounds.

3. **Dependence on SMC s Ecosystem** If you re already using non-SMC pneumatic components, integrating this cylinder may require additional adapters or compatibility checks, adding complexity.

4. **Potential Overkill for Light-Duty Applications** If the application only requires occasional or low-force actuation, a more basic cylinder might suffice, making this a cost-inefficient choice.

5. **Lead Times for Replacement Parts** While SMC is reliable, parts may not be as immediately available as those from mass-market suppliers, which could cause delays in maintenance.

6. **Learning Curve for Auto Switch Programming** The auto switch feature, while convenient, may require familiarity with SMC s control systems or additional programming if interfacing with PLCs or automation software.

7. **No Built-in Position Feedback Beyond Stroke Detection** The auto switch only confirms end-of-stroke; it does not provide continuous position feedback, which may limit its use in advanced motion control applications.

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The **SMC CDG1UN40-125Z-B53L** is an excellent choice for applications requiring **reliable, precise, and space-efficient pneumatic actuation with automatic stroke detection**. Its integration with SMC s ecosystem, durability, and ease of maintenance make it a strong option for industrial automation, packaging, or assembly lines where consistency is paramount.

However, if **cost is a major concern**, **customization is needed**, or the application is **low-volume and simple**, a generic or mid-range pneumatic cylinder might be more appropriate. Additionally, buyers should ensure their existing system is compatible with SMC components to avoid unnecessary complexity.

- You are already using SMC components and need a reliable, standardized solution.

- Your application requires automatic end-of-stroke detection to simplify wiring.

- You prioritize long-term durability and ease of maintenance in a high-cycle environment.

- Space constraints make a compact cylinder essential.

- Budget is tight, and a lower-cost cylinder meets your performance needs.

- You require continuous position feedback (considering a cylinder with built-in sensors).

- Your application is non-industrial or infrequently used, where a simpler design would suffice.

For most **industrial automation or precision pneumatic applications**, this SMC cylinder is a **strong, well-supported choice** that balances performance with practicality.

Details:

MPN: CDG1UN40-125Z-B53L. The impact extruded aluminum tube provides exceptional smoothness for low breakaway pressure and smooth stroke operation. Buyer pays return shipping unless item was misrepresented. Condition: Used.

Quality New Surplus and Used Industrial Automation Controls Equipment. Part Number: CDG1UN40-125Z-B53L. Country of Origin: Japan. Cylinder Type: Single Rod.

Tested and fully functional. Notes: Previously used item in good condition. Model: CDG1UN40-125Z-B53L. Suitable Media: Compressed Air.

Can ship using your UPS account number upon request. Bore Diameter: 40mm. Type: Pneumatic Cylinder. Cylinder Action: Double Acting.

Mounting Type: Basic Style. Provide: Zip code, commercial/residential location, lift gate needs. Manufacturer: SMC.

part #: cdg1un40125zb53l price

• $95.00

specifications hydraulicylind:

• brand: Smc
• mpn: Cdg1un40-125z-b53l
• shelf: B-4
• bore diameter: 40 Mm
• type: Pneumatic Cylinder
• stroke length: 125 Mm
• suitable media: Compressed Air
• cylinder action: Double Acting
• maximum pressure: 1.0 Mpa
• rated pressure: 0.05 Mpa
• mounting type: Basic Style
• cylinder type: Single Rod
• country of origin: Japan

seller hydraulicylind:

• # reviews: 6889
• rating: 100.0%
• city: Bardstown, Kentucky

offer hydraulicylind:

• best offers: True
• options: Ship-to-home
• sold: 0
• availability: In Stock
• started: May 19, 2026
• quantity: 1

returns hydraulicylind:

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

payments hydraulicylind:

• credit card: Discover
• other
• wallet: Paypal

general hydraulicylind:

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

shipping hydraulicylind:

• carrier: UPS
• service: UPS Ground, UPS 2nd Day Air, UPS Next Day Air
• cost: $18.24
• transit: 2-7 Days
• class: Standard, Expedited, One-day
• type: Calculated

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