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 chrome-plated steel to resist corrosion and reduce friction during use. Seals and O-rings are generally made of polyurethane or nitrile rubber, materials that ensure watertightness and resistance to oil and pressure.

2. Dimensions

• Bore (inside diameter): 203.2 mm
• 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 overall 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 Features

• 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 area of ​​the piston, calculated as:
  $$A$$

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

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

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. Power Calculations

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

$$P$$

Where:

• FF $F$ is the force in Newton,
• vv $v$ is the speed of the stem (m/s),
• The power PP $P$ 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: $\times$ $\times$ = $\backslash$ times 10^5 \times 0.0325 = 812.500 $F$ $=$ $250$ $\times$ $1$ $0$ 5 $\times$ $0.0325$ $=$ $812.500$ $N.$

6. Advantages of Buying Ready-to-Deliver from Stock

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

• Reduce downtime: Having components readily available is essential to avoid long machine downtime.
• Greater flexibility: A stock component can be replaced quickly, improving production efficiency.
• Competitive Pricing: Buying in bulk can offer more competitive pricing than custom orders, especially if the component is from a reliable supplier.

7. Brand Description

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