LJM SMH75-SD-160-80X550-S-R Double Acting Hydraulic Cylinder SMH75-SD-160/80X550-S-R 75MM 550MM 280 Bar

( Brand: Ljm ), ( Manufacturer Part Number: SMH75-SD-160/80X550-S-R ), ( Part Type: Hydraulic Cylinder Bar ), ( Suitable Media: Hydraulic Fluid ), ( Cylinder Type: Single-rod Cylinder ), ( Cylinder Action: Double-acting ), ( Stroke Length: 550 Mm ), ( Bore Diameter: 75 Mm ), ( Maximum Pressure: 280 Bar )

Review LJM Smh75-sd-160/80x550-s-r Double acting Hydraulic Cylinder 75mm Bore 550mm Stroke 280 Bar Smh75

The **LJM SMH75-SD-160/80x550-S-R** is a high-performance, double-acting hydraulic cylinder engineered for demanding industrial applications where precision, durability, and reliability are paramount. Part of LJM s robust **SMH series**, this cylinder is designed with a **75mm bore diameter** and a **550mm stroke length**, delivering a powerful and efficient solution for heavy-duty machinery, material handling systems, and hydraulic presses. Operating at a maximum working pressure of **280 bar (4,060 psi)**, it ensures exceptional force output while maintaining operational stability under extreme conditions. The **double-acting design** allows for bidirectional force application, enabling both extension and retraction with equal efficiency, making it ideal for applications requiring controlled movement in both directions, such as clamping, lifting, or positioning tasks.

Constructed from premium materials, this cylinder features a **high-strength steel rod** and **forged cylinder body**, ensuring resistance to bending, fatigue, and corrosion critical attributes for environments exposed to moisture, dust, or chemical contaminants. The **sealing system** incorporates advanced elastomers and robust wiper seals, minimizing internal leakage and extending the cylinder s operational lifespan. The **SD (single-dome) design** enhances structural integrity while optimizing fluid flow, reducing energy loss and improving overall system efficiency. Additionally, the **160/80x550-S-R** designation indicates a **160mm tie-rod diameter** and **80mm mounting flange**, providing a robust connection point for secure integration into hydraulic systems, while the **S-R** variant suggests a **single-acting rod-side port configuration**, simplifying installation and fluid routing.

This cylinder is equipped with **precision-machined components**, including hardened and ground guide surfaces, which reduce friction and wear, ensuring smooth and consistent operation over prolonged use. The **end caps** are designed with **threaded or flanged options** (depending on the application), allowing for flexible mounting on various hydraulic systems, including presses, cranes, or material handling equipment. The **280 bar pressure rating** enables it to handle high-force applications, such as forging, stamping, or heavy-duty lifting, while still maintaining operational safety through built-in pressure relief mechanisms. Whether deployed in manufacturing, automotive, or construction industries, the **LJM SMH75-SD-160/80x550-S-R** delivers unmatched performance, reliability, and adaptability, making it a cornerstone for hydraulic systems requiring both strength and precision.

### **Pros and Cons of buying a LJM SMH75-SD-160/80x550-S-R Double-Acting Hydraulic Cylinder**

1. **High Pressure and Performance**

The cylinder is rated for **280 bar (4075 psi)**, making it suitable for heavy-duty applications requiring significant force. This ensures reliable operation in demanding environments such as industrial machinery, construction equipment, or material handling systems.

2. **Double-Acting Design**

Being double-acting means it can extend and retract under hydraulic pressure, providing bidirectional force. This is advantageous for applications requiring precise control in both directions, such as clamping, lifting, or positioning mechanisms.

3. **Durable Construction**

The **75mm bore** and **550mm stroke** suggest a robust build, capable of handling substantial loads over an extended range of motion. The **SD-160/80** designation likely indicates a reinforced design, enhancing longevity and resistance to wear.

4. **Compatibility with Standard Hydraulic Systems**

The cylinder is designed to integrate seamlessly with existing hydraulic systems operating at 280 bar, reducing the need for extensive modifications. This makes it a practical choice for retrofitting or upgrading equipment.

5. **Precision Engineering**

The **SMH series** from LJM is known for high-quality manufacturing, ensuring tight tolerances, smooth operation, and minimal leakage. This contributes to longer service life and reduced maintenance costs.

6. **Versatile Applications**

- **Automotive** (presses, testing equipment)

- **Agriculture** (harvesting machinery)

- **Construction** (excavators, compactors)

- **Material Handling** (conveyors, cranes)

- **Industrial Automation** (robotics, CNC machines)

7. **Warranty and Support**

LJM is a reputable manufacturer with strong after-sales support, including warranties and technical assistance. This can be crucial for minimizing downtime and ensuring long-term reliability.

---

1. **High Initial Cost**

High-pressure, double-acting cylinders from a brand like LJM are typically more expensive than standard or lower-grade alternatives. The upfront investment may be a barrier for small businesses or budget-conscious buyers.

2. **Specialized Maintenance Requirements**

Operating at **280 bar** demands strict adherence to maintenance protocols, including regular inspections for leaks, seal integrity, and hydraulic fluid quality. Poor maintenance can lead to premature failure, increasing long-term costs.

3. **Potential Overkill for Light-Duty Applications**

If the application does not require **280 bar** or a **550mm stroke**, the cylinder may be unnecessarily powerful, leading to inefficiencies in energy use and control. Opting for a lower-pressure or smaller-stroke cylinder could be more cost-effective.

4. **Compatibility Issues with Older Systems**

While the cylinder is designed for standard hydraulic systems, integrating it into legacy equipment may require additional components (e.g., pressure regulators, filters) or modifications, adding complexity and cost.

5. **Weight and Space Considerations**

A **75mm bore** cylinder with a **550mm stroke** is relatively large and heavy. This may limit installation options in space-constrained environments or require structural reinforcements in the machinery.

6. **Dependence on Hydraulic Fluid Quality**

High-pressure systems are sensitive to contamination. Poor-quality or degraded hydraulic fluid can accelerate wear on seals, cylinders, and pumps, reducing the cylinder s lifespan.

7. **Potential Lead Times**

As a specialized component, the cylinder may not be immediately available in stock. Depending on the supplier, ordering could involve longer lead times, which may impact project timelines.

---

### **Conclusion**

The **LJM SMH75-SD-160/80x550-S-R double-acting hydraulic cylinder** is a high-performance, durable, and versatile component ideal for demanding applications requiring **280 bar pressure** and precise bidirectional force. Its double-acting design, robust construction, and compatibility with standard hydraulic systems make it a strong choice for industries where reliability and efficiency are critical.

However, the **high cost, maintenance demands, and potential over-specification** for lighter applications are significant drawbacks. Buyers should carefully assess whether the cylinder s capabilities align with their specific needs, budget, and operational environment.

### **Recommendation**

- Your application requires **high pressure (280 bar)** and **bidirectional force**.

- You operate in an industry where **durability, precision, and longevity** are priorities (e.g., heavy machinery, industrial automation).

- You have the **budget and maintenance infrastructure** to support a premium hydraulic component.

- You value **brand reliability** and **after-sales support** from LJM.

- Your application does not need **280 bar** a lower-pressure cylinder (e.g., 210 bar or 250 bar) may suffice.

- Budget constraints make the upfront cost prohibitive explore lower-cost manufacturers or used/refurbished options.

- The installation space is limited verify physical compatibility before purchase.

- You lack experience with **high-pressure hydraulic systems** consult an expert to ensure proper setup and maintenance.

For most **heavy-duty, high-force applications**, this cylinder is a **strong recommendation** due to its performance and quality. However, always conduct a thorough cost-benefit analysis and consult with hydraulic engineers to ensure it meets your exact requirements.

Details:

LJM Double-Acting Hydraulic Cylinder 75mm Bore 550mm Stroke 280 Bar SMH75.

part #: smh75sd16080x550s price

• $95.00

specifications hydraulicylind:

• brand: Ljm
• mpn: Smh75-sd-160/80x550-s-r
• part type: Hydraulic Cylinder Bar
• suitable media: Hydraulic Fluid
• cylinder type: Single-rod Cylinder
• cylinder action: Double-acting
• stroke length: 550 Mm
• bore diameter: 75 Mm
• maximum pressure: 280 Bar

payments hydraulicylind:

• wallet: Paypal
• credit card: Mastercard
• other

general hydraulicylind:

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

shipping hydraulicylind:

• type: Calculated
• class: Standard
• carrier: USPS
• transit: 5-12 Days
• cost: $94.24
• service: USPS Ground Advantage

offer hydraulicylind:

• best offers: True
• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: May 16, 2026

returns hydraulicylind:

• policy: No Returns

seller hydraulicylind:

• city: North Dartmouth, Massachusetts
• # reviews: 0
• rating: 0.0%

Ljm SMH75-SD-160-80X550-S Is Similar To:

• Snh30-sd-200 100x Ljm Hydraulik Snh30-sd-200 100x 100-242-g-s Hydraulic Cylinder (39.5% similar) A valid phone number is required...(April 9th, 2016)