CHICAGO CYLINDER DP-6-3.5-S Hydraulic Pneumatic Cylinders DP-9-4-00PNEUMATIC

( Brand: Chicago Cylinder ), ( Manufacturer Part Number: DP-6-3.5-S ), ( Part Type: Hydraulic Pneumatic Cylinder ), ( Country Of Origin: United States )

Review CHICAGO CYLINDER

The **Chicago Cylinder DP-6-3.5-S** and **DP-9-4.00P** pneumatic cylinders represent a robust and versatile solution for industrial automation, material handling, and manufacturing applications where precision, reliability, and durability are paramount. These cylinders are engineered by Chicago Pneumatic, a brand synonymous with high-performance pneumatic components, and are designed to deliver consistent force and motion with minimal maintenance demands. The **DP-6-3.5-S** features a compact yet sturdy construction with a **6-inch bore diameter**, making it ideal for medium-duty applications such as clamping, pressing, or light to moderate material positioning. Its **3.5-inch stroke length** ensures efficient operation in confined spaces, while the **single-acting design** (with spring return) simplifies system integration by eliminating the need for external return mechanisms. The cylinder s **aluminum alloy body** provides a lightweight yet rigid structure, reducing overall system weight without compromising strength, and its **sealed rod guide** ensures smooth, vibration-free operation even under repeated cycles. The **DP-9-4.00P**, on the other hand, is a larger, double-acting cylinder with a **9-inch bore diameter** and a **4-inch stroke**, making it well-suited for heavier-duty tasks such as pushing, pulling, or actuating large components in assembly lines or packaging systems. Its **double-acting functionality** allows for precise control in both extension and retraction phases, enabling bidirectional force application when paired with a directional control valve. Both cylinders incorporate **Chicago Pneumatic s proprietary sealing technology**, featuring **Viton or NBR seals** that resist wear, oil, and environmental contaminants, ensuring long-term reliability even in harsh conditions. The **DP-9-4.00P** also includes a **piston rod with a threaded connection**, allowing for easy attachment to custom end fittings or mounting brackets, while its **integrated cushioning** on both the rod and cap sides minimizes noise and shock, extending the life of the cylinder and connected machinery. Whether deployed in automotive manufacturing, food processing, or general industrial automation, these cylinders are built to withstand high-pressure environments (rated up to **100 psi** for the DP-6-3.5-S and **125 psi** for the DP-9-4.00P) while maintaining consistent performance across millions of cycles. Their modular design allows for quick installation and swapping of components, reducing downtime during maintenance, and the inclusion of **standard M10 or M12 thread ports** ensures compatibility with a wide range of pneumatic fittings and control systems. Overall, the **DP-6-3.5-S** and **DP-9-4.00P** cylinders exemplify Chicago Pneumatic s commitment to innovation and engineering excellence, offering a seamless blend of power, precision, and adaptability for modern industrial applications.

### **Pros and Cons of buying a Chicago Cylinder DP-6-3.5-S and DP-9-4.00 (Pneumatic Actuators)**

#### **DP-6-3.5-S (6-inch, 3.5-inch stroke, single-acting, pneumatic)**

1. **Compact and Lightweight** The smaller size (6-inch diameter) makes it suitable for applications with limited space, such as industrial valves, air-operated equipment, or automated systems where weight is a concern.

2. **Single-Acting Design** Requires only compressed air to extend the actuator, while retraction is typically done via a spring or external force. This simplifies control in applications where only one direction of motion is actively powered.

3. **Cost-Effective for Basic Applications** Generally more affordable than double-acting models, making it a practical choice for simple on/off or positioning tasks where full bi-directional control isn t required.

4. **Reliable for Low-to-Moderate Pressure Systems** Works well in standard pneumatic systems (typically 80 100 psi), making it versatile for many industrial and commercial uses.

5. **Easy Installation and Maintenance** Standardized mounting and minimal internal components reduce setup time and long-term upkeep compared to more complex actuators.

6. **Good for Intermittent Use** Suitable for applications with frequent cycling (e.g., valve actuation, conveyor systems) where durability is important but extreme wear isn t a major concern.

1. **Limited Stroke Length** The 3.5-inch stroke may be insufficient for applications requiring larger movements, such as heavy-duty valve positioning or precise linear actuation.

2. **No Retractive Power** Since it relies on a spring or external force for retraction, it cannot actively push or pull in both directions, which limits its use in bidirectional control scenarios.

3. **Lower Force Output** Compared to larger or double-acting models, it may struggle with high-resistance loads, such as heavily lubricated valves or systems with significant friction.

4. **Less Precision in Positioning** Without active control in both directions, achieving exact positioning (e.g., in automated assembly lines) can be challenging.

5. **Dependence on External Spring** The quality of the retraction spring can affect reliability; a weak or damaged spring may lead to inconsistent performance.

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#### **DP-9-4.00 (9-inch, 4-inch stroke, double-acting, pneumatic)**

1. **Bidirectional Control** Double-acting design allows for active extension and retraction using compressed air, enabling precise control in both directions. This is ideal for applications requiring full linear motion, such as valve throttling, positioning systems, or automated machinery.

2. **Higher Force Capability** The larger size (9-inch diameter) and double-acting mechanism generate greater force, making it suitable for heavier loads, high-friction valves, or systems requiring robust actuation.

3. **Longer Stroke** The 4-inch stroke provides more travel distance, which is beneficial for applications needing extended movement, such as large valve openings or precise linear displacement.

4. **Versatility in Applications** Can be used in a wider range of industries, including water treatment, HVAC, oil and gas, and manufacturing, where bidirectional control is essential.

5. **Better Positioning Accuracy** Active control in both directions allows for more precise positioning, which is critical in automated systems, robotics, or processes requiring repeatable movements.

6. **Durability for Continuous Use** Double-acting designs are often more robust for sustained operation, reducing wear compared to single-acting models with springs.

7. **Compatibility with Advanced Control Systems** Works well with proportional valves, PLCs, or automated control systems that require fine-tuned actuation.

1. **Higher Cost** Double-acting actuators are generally more expensive than single-acting models due to additional components and complexity.

2. **Increased Complexity** Requires two air ports (extend and retract), which may complicate wiring and pneumatic line setup compared to single-acting units.

3. **Larger Size and Weight** The 9-inch diameter and double-acting mechanism make it bulkier and heavier, which may limit installation options in space-constrained environments.

4. **Higher Air Consumption** Double-acting actuators use more compressed air, which can increase operational costs in systems with high air demand.

5. **Potential for Leakage** More seals and moving parts increase the risk of air leaks over time, requiring regular maintenance to ensure efficiency.

6. **Overkill for Simple Applications** If bidirectional control isn t necessary, a double-acting actuator may be unnecessarily expensive for basic on/off tasks.

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### **Comparison Summary**

Feature DP-6-3.5-S (Single-Acting) DP-9-4.00 (Double-Acting)

------------------------ ----------------------------------- -----------------------------------

**Directional Control** Single-direction (extend only) Bidirectional (extend/retract)

**Force Output** Lower (suitable for light loads) Higher (suitable for heavy loads)

**Stroke Length** 3.5 inches (limited) 4 inches (more versatile)

**Cost** Lower Higher

**Complexity** Simpler setup More complex (two air ports)

**Best For** Basic on/off, space-limited apps Precise positioning, heavy loads

**Maintenance** Minimal (spring-dependent) Moderate (more seals, air lines)

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### **Conclusion and Recommendation**

- You need a **compact, cost-effective solution** for simple on/off or single-direction actuation.

- Your application involves **low-to-moderate force** and **limited space** (e.g., small valves, light-duty automation).

- You prioritize **simplicity** and don t require bidirectional control.

- The **3.5-inch stroke** is sufficient for your movement needs.

- You require **precise bidirectional control** (e.g., valve throttling, automated positioning).

- Your application involves **heavier loads, high friction, or larger strokes** (up to 4 inches).

- You need **repeatable accuracy** in automated systems or industrial processes.

- You re willing to invest in a **more durable, higher-performance actuator** despite the higher cost.

- For **budget-conscious, low-complexity applications** (e.g., small valve actuation, simple automation), the **DP-6-3.5-S** is a practical and efficient choice.

- For **high-precision, heavy-duty, or bidirectional applications** (e.g., large valve control, industrial machinery, automated assembly lines), the **DP-9-4.00** is the superior option despite its higher cost and complexity.

If unsure, evaluate your system s **force requirements, stroke needs, and control demands** before purchasing. Consulting with a pneumatic specialist or reviewing the manufacturer s load charts can also help ensure the actuator is correctly sized for your application.

Details:

With the brands reputation for excellence and innovation, DP-9-4-00 Cylinder ensures precision, efficiency, longevity in hydraulic pneumatic systems. This high-quality Cylinder offers reliable performance and durable construction, making it a popular choice for various industrial business applications. Ideal for use in a wide range of industries, this product is valuable component any system requiring smooth and controlled motion. The Chicago Cylinder DP-9-4-00 is a pneumatic Cylinder manufactured by.

part #: dp635 prices

• $11.84-$25.00

specifications hydraulicylind:

• brand: Chicago Cylinder
• mpn: Dp-6-3.5-s
• part type: Hydraulic Pneumatic Cylinder
• country of origin: United States

returns hydraulicylind:

• policy: Returns Accepted
• paid by: Buyer
• method: Money back
• time: 14 Days

seller hydraulicylind:

• rating: 100.0%
• city: Ossipee, New Hampshire
• # reviews: 484

shipping hydraulicylind:

• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• transit: 6-10 Days
• cost: $6.72
• type: Calculated

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offer hydraulicylind:

• availability: In Stock
• started: May 9, 2026
• best offers: True
• quantity: 1
• sold: 0
• options: Ship-to-home

general hydraulicylind:

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

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