Category: mechanism

Surprisingly simple machine to get chunks of dough round 

Sharpening pencils 

The Tower Spherical Steam Engine 

How a sewing machine works 

How the Bobbin of a Sewing Machine Works  

Cat Claw retraction 

How a gear box works. 

That’s the way waves born… 

Luger Pistol Toggle-Lock Action 

My cupholder is cooler