Hydraulic Cylinders / Jacks - A Brief
Hydraulic cylinder is used to give a linear force through a linear stroke
in any hydraulic based system. Also known as linear hydraulic motor, the
cylinder has many applications notably in hydraulic machinery and
engineering vehicles. Hydraulic cylinder consists of the following parts:
It is mostly seamless forged pipe, which is ground and/or honed internally.
In most hydraulic cylinders, the barrel and the bottom are welded together.
Cylinder head is connected to the barrel with a sort of a simple lock.
The piston is a short metal component that separates the two sides of the
cylinder barrel internally. It is machined with grooves to fit elastomer or
Piston rod is cold-rolled steel, which attaches to the piston and extends
from the cylinder through the rod-end head.
Rod gland is an area interfaced between the rod and the head, which is
effective in preventing the pressurized oil from leaking.
Besides these, there are several other parts such as cylinder bottom
connection, seals, cushions, etc.
Hydraulic jack is a device, which lifts heavy equipment. These jacks find
wide applications in automobile industry. Most common forms include car
jack, floor jack, garage jack, etc. Car jacks usually use mechanical
advantage to allow a human to lift a vehicle by manual force alone.
Hydraulic jacks provide more lift over greater distances.