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Video Cylinder - Crank Drive
Video Piston 1
Video Piston 2
Video Piston 3
Video Piston 4
Video Piston - history
Video Piston - in general
Video Piston - material
Video Piston - stress
Video Piston - dimensions
Video Piston - measuring
Video Piston - truck
Video Piston Pin
Video Piston Pin Offset
Video Piston Rings 1
Video Piston Rings 2
Video Piston Rings 3
Video Connecting Rod
Video Crankshaft-history
Video Crankshaft 1
Video Crankshaft 2
Video Crankshaft 3
Video Crankshaft 4
Video Crankshaft 5
Video V-2 Crankshaft 6
Video Crankshaft 7
Video Bearing Play Check
Video Forces crank mechanism
Video Rot. Vibration Damper
Video Equaliser Shafts 1
Video Equaliser Shafts 2
Video 5-cyl. Block
Video Fly Wheel
Video Cylinder Block 1
Video Cylinder Block 2
Video Cylinder Block 3
Video Cylinder Block 4
Video Cylinder Block 5
Video Cylinder Block 6
Video Measurements
Video Loop Scavenging
Video Classic Racing Engine
Video V8 Cylinder Block
Video V8 Crankshaft 1
Video V8 Crankshaft 2
Video V10 Cylinder Block
Video V12 Cylinder Block
Video W12 Cylinder Block
Video W8 Cylinder Block

Video CO2-Emissions
Video Torque
Video Gas Speed
Video Hollow Cylinder
Video Bore Stroke Ratio
Video Cubic Capacity
Video Output per Liter
Video Efficiency
Video Calc. Crank Mechan.
Video Pistin Force
Video Compression Ratio
Video Pistin Speed
Video Power (output)
Video Power (piston pressure)

Video Multi-cylinder engine 1
Video Multi-cylinder engine 10

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Piston Pin


The piston pin connects the piston with the connecting rod. The designer - exactly like with the piston must pay attention to the weight.

How it works

The piston pin is mostly either mounted fully floating in the piston or in the small connecting rod with very few play. In some cases it is both. A protection device to protect the cylinder wall against damage caused by the piston pin is especially important. For protection, round wires or circlips (for diesel engines) are used. For this grooves are implemented in the piston pin bore of the piston.

The piston pin is made hollow and features either a constant cross section, or it is strengthened in the middle. Two-stroke engines may have drillings that are interrupted to avoid a connection of channels and therefore scavenging losses. It is produced most often from low-carbon steel and is hardened at the surface. High demand piston pins consist of nitriding steels.


The piston pins which are mounted fully floating in the connecting rod can be inserted more easily if you heat the piston to approx. 80C. 05/08               Top of page               Index
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Translator: Don Leslie - Email:

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