In the context of engines and machinery, sleeves (often called cylinder sleeves or liners) are components that line the interior of the engine’s cylinder. They provide a durable, replaceable surface for the piston to move within, protecting the cylinder from wear and reducing friction.
Made from materials like cast iron, steel, or composites, sleeves are designed to withstand the high temperatures and pressures inside the engine. They help extend the life of the engine by preventing direct contact between the piston and the cylinder wall, thus minimizing wear.
Cylinder sleeves are commonly used in both automotive and industrial engines, and replacing them can restore engine performance without the need for a full rebuild.
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