Hydraulic Cylinder Bore 203.2 mm x Stroke 680 mm

1. Construction and Materials

A hydraulic cylinder with a bore of 203.2 mm and a stroke of 680 mm is an essential component for lifting, handling or hydraulic press systems. Typically constructed of high-strength steel for the cylinder tube and piston, the shaft may be made of chromed steel to resist corrosion and reduce friction during use. The gaskets and sealing rings are generally made of polyurethane or nitrile rubber, materials that guarantee watertightness and resistance to oil and pressure.

2. Dimensions

• Bore (Inner Diameter): 203.2mm
• Stroke (travel length): 680 mm
• Rod diameter: Variable, but typically 80-100mm for cylinders of this size, depending on operating pressure.
• Overall Cylinder Dimensions: The total length of the cylinder (at rest) can be calculated as the sum of the stroke, bore length, and cylinder ends, including any mounting plates.

3. Mechanical Characteristics

• Maximum operating pressure: Typically between 250 and 350 bar, depending on model and construction.

• Force generated: The output force depends on the applied pressure and the piston area. The formula is:

  $$F$$

  Where:

  • FF $F$ is the force (in Newtons)
  • PP $P$ is the pressure (in Pascals or N/m²)
  • AA $A$ is the piston area, calculated as:
  $$A$$

  With dd $d$ equal to the bore (203.2 mm).

• Rod speed: Determined by hydraulic oil flow and internal cylinder volume.

4. Sectors of Use

These cylinders are mainly used in heavy industrial sectors, such as:

• Lifting and handling machinery (cranes, overhead cranes)
• Hydraulic presses for metal deformation
• Agricultural sectors (equipment such as plows or tractors)
• Construction and infrastructure (earthmoving machinery)

5. Calculations for Power

The power generated by the cylinder at various pressures can be calculated using the formula:

$$P$$

Where:

• FF $F$ is the force in Newtons,
• vv $v$ is the rod speed (m/s),
• PP $P$ power is expressed in kilowatts.

For example, at a pressure of 250 bar, the force generated can be calculated as follows:

• Piston area: A=π×(0.2032)24=0.0325A = \pi \times \frac{(0.2032)^2}{4} = 0.0325 $A$ $=$ $\pi$ $\times$ 4 ( 0 , 2032 ) 2 ​= $0$ $,$ $0325$ m².
• Applied pressure P=250×105P = 250 \times 10^5 $P$ $=$ $250$ $\times$ $1$ $0$ 5 N/m².
• Force: $=$ $\backslash$ times 10^5 \times 0.0325 $=$ $812.500$ $F$ $=$ $250$ $\times$ $1$ $0$ 5 $\times$ $0.0325$ $=$ $812.500$ N.

6. Advantages of Purchasing Ready to Ship in Stock

Purchasing a hydraulic cylinder ready for delivery offers advantages such as:

• Reduced downtime: It is essential to have components readily available to avoid long downtime.
• Greater flexibility: A stock component can be replaced quickly, improving production efficiency.
• Competitive pricing: Buying in stock can offer more competitive pricing than custom orders, especially if the part is from a reputable supplier.

7. Description of the Brand

Many leading manufacturers, such as Cross Hydraulics , produce cylinders to high quality and durability specifications. Cross Hydraulics, for example, is known for producing robust, long-lasting tie rod cylinders, using high-quality materials to ensure product reliability