Double-acting pneumatic cylinders are typically constructed using a combination of durable and lightweight materials, chosen to provide strength, corrosion resistance, and efficient operation. Common materials include:
1. Cylinder Tube:
Aluminum: Lightweight, corrosion-resistant, and commonly used in general applications.
Stainless Steel: Offers high corrosion resistance and durability, ideal for harsh or sanitary environments.
Steel (Chromed or Nickel-Plated): Provides strength and wear resistance, often used in heavy-duty applications.
2. Piston Rod:
Stainless Steel: High resistance to corrosion and wear, suitable for environments with moisture or chemicals.
Carbon Steel (Chromed or Nickel-Plated): Ensures smooth operation and durability in less corrosive environments.
Alloy Steel: Used for heavy-duty applications requiring high strength.
3. End Caps:
Aluminum: Lightweight and corrosion-resistant, often paired with aluminum tubes.
Cast Iron or Steel: Used for heavy-duty cylinders needing extra durability.
Plastic or Composite Materials: Sometimes used in lighter-duty or specialty applications to reduce weight.
4. Seals and Bearings:
Nitrile Rubber (NBR): Common for general-purpose seals due to its affordability and good performance with air.
Viton (FKM): Used for high-temperature or chemical-resistant seals.
Polyurethane: Offers excellent wear resistance and elasticity for dynamic sealing applications.
5. Mounting Components:
Steel or Stainless Steel: To handle mechanical stresses and ensure reliable mounting in diverse environments.
Aluminum: For lighter applications requiring weight reduction.
These materials are selected based on the intended application, environmental factors (such as temperature, humidity, or chemical exposure), and the load capacity requirements of the pneumatic cylinder.
