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Air Cylinder Barrel

FESTO standard Aluminum Pneumatic Cylinder Tube for Pneumatic Cylinder

FESTO cylinder is composed of Cylinder Barrel, end cover, piston, piston rod, and sealing components.

The inner diameter of the FESTO cylinder barrel represents the magnitude of the cylinder output force. The piston should slide smoothly back and forth inside the cylinder, and the surface roughness of the cylinder should reach Ra0.8um. For steel pipe cylinders, the inner surface should also be plated with hard chromium to reduce frictional resistance and wear, and to prevent rusting. In addition to using high carbon steel pipes, the cylinder barrel material is also made of high-strength aluminum alloy and brass. Small cylinders use stainless steel pipes. Cylinders with magnetic switches or cylinders used in corrosion-resistant environments should use materials such as stainless steel, aluminum alloy, or brass for the cylinder barrel. FESTO cylinder piston adopts a combination sealing ring to achieve bidirectional sealing, and the piston and piston rod are connected by rivets without nuts.

FESTO cylinder end caps are equipped with intake and exhaust ports, and some also have buffer mechanisms inside the end caps. The end cover on the rod side is equipped with a sealing ring and a dust ring to prevent air leakage from the piston rod and prevent external dust from entering the cylinder. A guide sleeve is installed on the end cover of the rod to improve the guiding accuracy of the cylinder, withstand a small amount of lateral load on the piston rod, reduce the downward bending of the piston rod when it extends, and extend the service life of the cylinder. The guide sleeve usually uses sintered oil containing alloy and forward leaning copper castings. In the past, malleable cast iron was commonly used for end caps. To reduce weight and prevent rust, aluminum alloy die-casting was often used, and brass material was used for micro cylinders.

FESTO cylinder piston is a pressurized component in the cylinder. To prevent air leakage between the left and right chambers of the piston, a piston sealing ring is installed. The wear-resistant ring on the piston can improve the guidance of the cylinder, reduce the wear of the piston sealing ring, and reduce frictional resistance. Wear resistant rings are made of materials such as polyurethane, polytetrafluoroethylene, and synthetic resin for fabric clamping. The width of the piston is determined by the size of the sealing ring and the necessary length of the sliding part. The sliding part is too short, which can easily cause early wear and jamming. The materials commonly used for pistons are aluminum alloy and cast iron, while pistons for small cylinders are made of brass. The FESTO cylinder piston rod is the most important load-bearing component in the cylinder. High carbon steel is usually used, with a surface treated with hard chrome plating, or stainless steel is used to prevent corrosion and improve the wear resistance of the sealing ring. FESTO cylinder seals: The sealing of components in rotary or reciprocating motion is called dynamic sealing, while the sealing of stationary parts is called static sealing.

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