KeyRing of a combustion V45/V60/V90/V180-engine with turning crankshaft and moving pistons.
Release 2.0 d.d. 28-8-2025: improved clicking of crank cheek/crank case.
 

Printing
No supports.
I printed with PLA+, layer height 0.15 mm.

Assembly
No glue.
Use some oil or grease between moving parts for a smooth operation.
- Place the piston rods on the crankpin (upper piston rod upside down).
- Screw the pivoting knob on the crankpin.
- Place the pistons with the piston pins on the piston rods.
- Click the pistons in the cylinders, and at the same time click the crankshaft in the crankcase.

Operation
Put your finger on the pivoting knob to turn the crankshaft.


This design is a spin-off of my “Engine KeyRing”.
Engine KeyRing by Bootjevaarder - MakerWorld