Hydraulic Cylinders

Hydraulic cylinders are mechanical actuators which give unidirectional force through a unidirectional stroke. They get their power from a pressurised hydraulic fluid, which is usually oil. The cylinder can be seen as the motor while the generator is the hydraulic pump. A hydraulic cylinder consists of a hydraulic barrel, in which a piston connects to a piston rod moves back and forth. At both ends, the barrel is enclosed by the cap and the gland, where the rod comes out of the chamber. Other parts include the head, the seal gland and seals. Hydraulic cylinders can be single or double acting and they have different mounting methods. One type is the tie rod cylinder which has highly strengthened threaded steel rods to hold the caps to the barrel. The welded body cylinder can be easily dismantled for maintenance or repair. Other more specialised types are: the telescopic, plunger, differential and position sensing 'smart' hydraulic cylinders. Different hydraulic cylinders have different applications. The tie rod cylinder is mainly used for industrial factory machinery. The welded body cylinder is found for construction equipment such as excavators, bulldozers and road graders. It is also used for material-handling equipment like forklifts, telehandlers and lift-gates.

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