BIMBA 311.5-RP Spring Extend Air Cylinder

( Brand: Bimba ), ( Manufacturer Part Number: 311.5-RP ), ( Part Type: Spring Cylinder ), ( Country Of Manufacture: Usa )

Review BIMBA Inch Bore 1.5 Stroke Spring Extend Air Return Cylinder

The **Bimba 311.5-RP 1.5** spring-return air cylinder is a precision-engineered pneumatic actuator designed for high-performance industrial automation applications where reliability, efficiency, and compact form factor are paramount. This robust, rod-extending cylinder features a **1.5-inch bore diameter**, delivering a balanced combination of force output and operational speed to meet the demands of medium-duty tasks in assembly lines, material handling systems, and automated packaging machinery. Constructed from high-grade materials, the cylinder s **aluminum alloy housing** ensures lightweight durability while resisting corrosion, making it ideal for environments where cleanliness and longevity are critical. The **spring-return mechanism** provides immediate and consistent return-to-position functionality, eliminating the need for external return springs or additional piping, thus simplifying system design and reducing installation complexity. With a **standard stroke length of 12 inches** (adjustable to suit specific application requirements), this cylinder offers a versatile range of motion, accommodating everything from precise positioning tasks to robust gripping and clamping operations.

The **RP (rod-piston) design** of the 311.5-RP model ensures smooth, low-friction operation, thanks to its **sealed rod guide system** and **high-performance piston seals**, which minimize wear and extend the cylinder s operational lifespan. The cylinder s **dual-port connection** allows for flexible integration into existing pneumatic systems, accommodating both standard M5 or M8 quick-connect fittings for ease of maintenance and rapid tooling changes. Additionally, the **integrated cushioning system** on both the rod and cap sides dampens end-of-stroke impacts, reducing noise and mechanical stress on connected components, which is particularly beneficial in high-cycle applications. The **IP65-rated** protection class ensures resistance to dust, dirt, and light splashes, making it suitable for semi-clean environments such as food and beverage processing, automotive assembly, and pharmaceutical packaging, where hygiene and contamination control are essential.

For enhanced safety and operational monitoring, the **Bimba 311.5-RP 1.5** can be equipped with optional accessories such as **position sensors, magnetic feedback devices, or quick-disconnect couplings**, enabling seamless integration into advanced control systems. Its **compatibility with standard air pressures (typically 80 100 psi)** ensures consistent performance across a wide range of industrial settings, while its **low-maintenance design** reduces downtime by minimizing the need for frequent lubrication or seal replacements. Whether deployed in a high-speed packaging line, a precision assembly cell, or a material sorting system, this cylinder exemplifies Bimba s commitment to delivering a **compact yet powerful** solution that balances performance, reliability, and ease of integration. Its modular design further allows for customization, including the addition of **custom rod extensions, mounting brackets, or specialized end fittings**, ensuring it can be tailored to the exact specifications of even the most demanding applications.

### **Pros and Cons of buying a Bimba 311.5-RP 1.5 Spring-Return Air Cylinder**

1. **Reliability and Durability** Bimba is a well-established manufacturer known for producing high-quality pneumatic components. The 311.5 series is designed for heavy-duty applications, ensuring long-term performance in industrial environments.

2. **Spring-Return Functionality** The built-in spring return eliminates the need for an external spring or additional actuators, simplifying system design and reducing installation complexity.

3. **Compact and Lightweight Design** The 1.5-inch bore size makes it suitable for applications where space is limited, while still providing sufficient force for moderate loads.

4. **Standardized Compatibility** It follows industry-standard mounting and porting configurations, making it easy to integrate with existing pneumatic systems without extensive modifications.

5. **Low Maintenance Requirements** Air cylinders from reputable brands like Bimba are designed for minimal upkeep, reducing downtime and operational costs over time.

6. **Good Force Output** With a 1.5-inch bore, it delivers adequate force for many automation tasks, including light to medium-duty applications such as packaging, material handling, and simple clamping.

7. **Cost-Effective for Mid-Range Applications** While not the cheapest option, it offers a balance between performance and price, making it a practical choice for many industrial setups.

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1. **Limited Stroke Length** The 311.5 series has a relatively short standard stroke (typically up to 10 inches), which may not be sufficient for applications requiring longer travel distances.

2. **Not Ideal for Heavy Loads** While durable, the 1.5-inch bore may struggle with extremely heavy or high-impact loads without additional support (e.g., guide rods or cushioned mounts).

3. **Potential for Wear Over Time** Like all pneumatic cylinders, prolonged use in abrasive or contaminated environments can lead to wear on seals and internal components, requiring eventual replacement.

4. **Dependence on Compressed Air Quality** Poor air filtration or excessive moisture can reduce efficiency and lifespan, requiring additional system maintenance (e.g., air dryers, filters).

5. **Higher Initial Cost Than Basic Models** Compared to very basic or generic cylinders, the Bimba 311.5-RP is priced higher, which may be a drawback for budget-conscious buyers unless long-term reliability is a priority.

6. **Limited Customization Options** Unlike some high-end or specialized cylinders, this model may not offer extensive customization for unique mounting or porting requirements.

7. **Potential for Leakage Over Time** Seals degrade with use, and while Bimba cylinders are robust, regular inspections may be needed to prevent air leaks that could affect performance.

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The **Bimba 311.5-RP 1.5 spring-return air cylinder** is a solid choice for applications requiring a **reliable, compact, and low-maintenance pneumatic actuator** in **light to medium-duty industrial settings**. Its spring-return feature simplifies system design, and its durability makes it suitable for frequent cycling in clean or moderately contaminated environments. However, it is **not ideal for heavy loads, long strokes, or extreme conditions** without additional support.

If your application involves **moderate force, short strokes, and a need for simplicity**, this cylinder is a **strong recommendation**. If you require **longer strokes, higher loads, or extreme environmental resistance**, you may need to consider a larger bore size (e.g., 2-inch or 3-inch) or a specialized cylinder with additional features like guide rods or cushioning.

For most **automation, packaging, or material handling tasks**, the Bimba 311.5-RP 1.5 is a **practical and cost-effective solution** that balances performance and ease of use. Always verify compatibility with your specific system requirements before purchasing.

Details:

Need it urgently. LOCAL PICK-UP, Prefer to pick it up yourself. Rear pivot mounting with bronze bushing. Cylinder Head and Cap Material: Aluminum.

Envelope Pressure: 250 PSI. After the return period has ended, you can no longer product. Action: Single Acting Spring sustained, air return. Next Day Second Air Services are available.

Cylinder Sleeve Material: Stainless Steel. Expedited shipping is also available. We choose the carrier. Quick Links Contact.

Mounting Style: Universal. Your phone number and business name. Threaded rod end with protective cap. Will there be a dock or forklift.

Rod End Type: 1/2-20. Rod Diameter: 5/8. Ports: 1/4 NPT. Unused, has scuffs and scratches from storage handling.

part #: 3115 prices

• $39.99-$224.35

specifications hydraulicylind:

• brand: Bimba
• mpn: 311.5-rp
• part type: Spring Cylinder
• country of manufacture: Usa

general hydraulicylind:

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

payments hydraulicylind:

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

offer hydraulicylind:

• options: Ship-to-home
• started: May 7, 2026
• availability: In Stock
• quantity: 1
• sold: 0

seller hydraulicylind:

• # reviews: 65143
• city: Middlebury, Indiana
• rating: 99.8%

returns hydraulicylind:

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

shipping hydraulicylind:

• class: Expedited
• cost: $13.99
• carrier: USPS
• service: USPS Priority Mail
• type: Fixed
• transit: 4-9 Days

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