33.2.4. Piston Pin
A piston pin is composed of a single body.
![../_images/image03615.png](../_images/image03615.png)
Figure 33.29 Piston pin
33.2.4.1. Modeling Options
Click the Pin icon of the Piston group in the Piston tab. The user can see the Crank Component - PistonPin dialog box.
The user can select the position where the piston pin is created in Component Index.
Figure 33.30 Crank Component - PistonPin dialog box
Click OK.
33.2.4.2. Properties
Click the right mouse button on the piston pin body to choose Properties of the piston pin. The user can modify the property of piston pin in the following dialog.
![../_images/image03915.png](../_images/image03915.png)
Figure 33.31 Piston Pin property page
The user can make Clearance between bodies using the value in the red box.
Reference Parametric Marker: Controls the position of piston pin. It is also the special parametric marker.
Length and Outer Diameter: Are also special parametric values.
The user can modify the parametric value in this section.
These values are enlisted in the special parametric value list.
Inner Diameter: Is the independent value which is not related with other entities.
Figure 33.32 Geometrical information of piston pin