It is sub assembly of 3d printed able model of working piston+crank shaft + connecting rod assembly which can be used as the engineering purpose or for education.

We can understand the working of the piston and connecting rod by simulating this.

Set Scale of every print to 0.58 percent.

Print Setting

PLA Color Any Color

Layer Thickness :0.2

Wall Thickness Top /Bottom :1.2

Infill:30

Supports : Yes

Nozzle Dia :0.4

Nozzle Temp :216

Bed Temp:60

Print Speed:55