Timing Gear – Timing gears, since the name implies, are used for various timing purposes. Also known as synchronous gears, they can be either spur or helical gears. They are generally used in automotive applications to control valve timing in engines.
Worm Equipment – A worm gear contains a worm and a worm wheel functioning collectively. The worm resembles a screw and may also be known as a worm screw, while the worm wheel appears similar to a spur gear or helical gear with a slight helix position. This set may also be also called a worm drive. Worm gears are the most compact type of gear and so are often used in applications where space is limited.
Spur Equipment – Spur gears are the most typical type of gear. They are used to transmit motion between two parallel shafts and so are known for being highly efficient and producing a lot of power. Spur gears are known by a number of other names including straight gears, straight-cut gears, spur wheels, and spur gearing. All of these have the same simple definition and can be used interchangeably.
Pump Equipment – A pump gear is the name to get a equipment used in gear pumps. They consist of both a driver and driven equipment and can become either spur or helical gears. Never to be confused, the word gear pump identifies the whole pump, while pump gears identifies the gears only. Gear pumps are positive displacement pumps, meaning they pump a constant amount of liquid in each revolution. The quantity of fluid in a revolution depends upon the geometry of the pump gears (i.e. number of the teeth, diametrical pitch, etc.).
Spline – Splines are the ridges or the teeth (exterior spline) on a drive shaft that mesh with an equal number of like ridges or teeth (internal spline) in a mating piece with the goal of transferring torque in one member to the additional. The most typical splines are parallel crucial splines, involute splines (closely related to involute gears but 
with shorter tooth, root to tip), and serrations. Splines could be produced by shaping, hobbing or broaching.
Sprocket – Sprockets, or sprocket wheels, are Ground Helical Gear Racks toothed tires whose tooth engage the links of chains or belts. Sprockets are distinguished from gears for the reason that sprockets should never be meshed together straight. There are several various kinds of sprockets, including silent chain, roller, and ladder sprockets.
Pinion Gear – A pinion is the smaller sized of two meshed gears in an assembly. Pinions gears could be either spur or helical type gears, and become either the driving or driven gear, depending on the application. Pinion gears are found in many types of gearing systems such as for example band and pinion or rack and pinion systems.