Piston
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A piston is a component of reciprocating engines, pumps and gas compressors. It is located in a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and/or connecting rod. In a pump, the function is reversed and force is transferred from the crankshaft to the piston for the purpose of compressing or ejecting the fluid in the cylinder. In some engines (two-strokes), the piston also acts as a valve by covering and uncovering ports in the cylinder wall.
Oversize pistons[edit | edit source]
- 1st => std.
- 2nd => 0.25mm
- 3rd => 0.50mm
- 4th => 0.75mm
- 5th => 1.00mm