Did you ever wonder, how are hydraulic cylinders made?
This video below giving a general overview of what it takes to create a hydraulic cylinder, and as you can see, not only do hydraulic cylinders provide much power, it takes much power to create them.
Machines do much of the hard work, but there is much of the hydraulic cylinder assembly process done by hand.
The adding of sealers and the placement of the rod in the cylinder are delicate processes that require a hands-on approach so the cylinder is not damaged, also the screws are placed in the cylinder head by hand.
Check it out!