Machines that work in heavy industry use chain mechanisms. The best example is the lifting mechanism used by a forklift truck.
Here the chain is the most important element. Safety depends on it.
Use of ladder chains
These are the most common drive chains. They are formed by plates connected by pins. It is similar to a ladder. Plate chains differ in application.
Pinned ladder chain
It is made of inner plates on pin pivots and outer plates placed "on push". It is rarely used in industry because it is inefficient.
Bushing type of chain
In these ladder chains, there are sleeves applied to the pins. They are very efficient. Their speed can be up to 15 m/s.
Roller in chain
These ladder chains are often used. They have a pin, sleeve and swivel roller. They make the links and wheel teeth wear less. The pins can be lengthened and the chain will be multi-row, which will make it more resistant. These chains are used in many devices, e.g. bicycles, forklifts.
Plate chains for internal transport
They are made of steel plates and strong pins. They can be used on production lines and transport machines. Thanks to the variety of materials used for their manufacture, they can be used both in the pharmaceutical and food industries.
They are divided into single hinged and multi hinged (for transporting heavy loads).
Short range transport and ring chains
They are made of rings arranged alternately. They are used in chain transmissions, in mining and construction, or to equip cranes and overhead travelling cranes.
They are used relatively rarely. This is because they are noisy and inefficient. In mining they are used to transport loads over short distances.
Materials for chains
The most commonly used materials for manufacturing chains are hardened steel and stainless steel. They are proven materials. However, their strength and durability depends largely on the quality of manufacture. Good workmanship is carried out by proper treatment, grinding of holes, bushings, as well as by planting plates, rollers and other elements. Even the weakest part can weigh heavily on the chain.