Timing Gear – Timing gears, because the name implies, are used for various timing purposes. Also known as synchronous gears, they could be either spur or helical gears. They are often found in automotive applications to regulate valve timing in engines.
Worm Ground Helical Gear Racks Equipment – A worm gear contains a worm and a worm wheel working with each other. The worm resembles a screw and is sometimes called a worm screw, as the worm wheel appears similar to a spur gear or helical equipment with a slight helix angle. This set is sometimes also called a worm drive. Worm gears are the most compact type of gear and so are often used in applications where space is bound.
Spur Equipment – Spur gears are the most common kind of gear. They are accustomed 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 quite a few other names including directly gears, straight-cut gears, spur tires, and spur gearing. These all have the same basic definition and can be used interchangeably.
Pump Equipment – A pump gear is the name meant for a equipment used in gear pumps. They contain both a driver and driven gear and can be either spur or helical gears. Not to be confused, the word gear pump identifies the whole pump, while pump gears identifies the gears just. Gear pumps are positive displacement pumps, which means they pump a constant amount of fluid in each revolution. The volume of fluid in a revolution depends upon the geometry of the pump gears (i.electronic. number of tooth, diametrical pitch, etc.).
Spline – Splines are the ridges or the teeth (external spline) on a drive shaft that mesh with an equal amount of like ridges or teeth (internal spline) in a mating piece with the purpose of transferring torque in one member to the various other. The most common splines are parallel essential splines, involute splines (carefully related to involute gears but with shorter tooth, root to suggestion), and serrations. Splines can be made by shaping, hobbing or broaching.
Sprocket – Sprockets, or sprocket wheels, are toothed wheels whose the teeth engage the links of chains or belts. Sprockets are distinguished from gears for the reason that sprockets are never meshed together straight. There are several 
different types of sprockets, including silent chain, roller, and ladder sprockets.
Pinion Equipment – A pinion may be the smaller of two meshed gears within an assembly. Pinions gears could be either spur or helical type gears, and become either the generating 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.