The gear wheel is the main part in the gear train. It looks like a disk, covered with a tooth around the whole circumference. When rotating, they mesh with the teeth of another such wheel, providing movement. There are two kinds of gears (generalized name for gears): the leading small and the driven large. Often you can find just cutting a larger wheel. To determine such a detail is easy - it will necessarily have six or more teeth. They are usually used in pairs and have a different number of teeth, such a scheme and provides the transformation of the torque (the external force that is applied to them) and transfers the rotation between the shafts. The gear ratio shows the ratio of revolutions per minute, you can calculate it in the ratio of gear sizes, as well as the ratio of the number of teeth.

Where is the gear used?

Such details are applied, practically, in all existing mechanisms, providing the possibility of mechanical movement:

• In cars, with their structure and inside the machines themselves (for example, inside the gearbox);
• In shipbuilding;
• In agricultural machinery;
• In construction equipment (crane);
• In the industrial sector: mining and food industry;
• In the arrangement of railway wagons;
• In military equipment (for example, in a tank);
• In pumps - hydraulic machines;
• In the mechanism of various winches and hoists;
• In the clockwork.

Since the invention of the gear system, its use in the water clock by the Romans, this principle has become the basis for the creation of rotational movement in virtually all mechanisms that extort it. Particular attention to the work of such details was given by the well-known inventor of innovative machines - Leonardo da Vinci.

Today they are applied everywhere and have several varieties and proven at the proper level of producers. The catalog of the latter can be found here: http://moskva.all.biz/, selecting by manufacturer and class.

In the derivative sector of such details, the CIS countries and the European Union have proved themselves well. A lot of companies provide dealer services in this sector, such as LLC "ENERGOGENERATION" from Kharkov.

Now the market is filled with different kinds of wheels, advanced technologies create wheels with a transverse, longitudinal and circular tooth line, with internal gearing, sectoral, conical, with rack and pinion transmission. The methods of manufacture in recent decades have been applied by rolling with the use of a comb, a worm cutter and a shoe, using both cold and hot rolling. Such manufacturing systems work to increase the strength and durability of metal, by the way, with such a metal, parts of the Toyota engine are manufactured.

When selecting gears, you should pay attention to their strength and noise range of operation. It is important to choose the necessary firmness for the appropriate mechanism, guided by the operating tips for each individual mechanism.