Uses of Different Interchangeable Parts
Keys are used to transfer the power from the motor or from any power source to any machine through power transmitting elements like gears, pulleys, sprockets, and cams.
They are attachments whereby shafts are connected to each other. For example, a coupling is used to connect the shaft of an electric motor to the line shaft of a machine.
When an axial force or load is to be transmitted from one shaft to another, pin joints like cotter joints and knuckle joints can be used.
There are some fasteners, so-called permanent fasteners, which do not permit the parent parts to be disassembled without damaging either the parent machine parts, or fasteners, or both. For example riveted joints and welded joints are considered to be in this category.
The bearing is a machine member which supports a moving part and confines its motion. This motion may be rotational or linear. This bearing is employed in vehicles, generators, pumps, turbines, etc.
A clutch may be considered a temporary coupling or connecting element that is used for engaging or disengaging the driving shaft to the driven shaft of machinery or a vehicle periodically, whenever the power is to be transmitted intermittently.
Belt drives are used for transmitting power between two non co-axial shafts but may be kept parallel or non-parallel, and at some distances.
A gear drive is a mechanical drive which transmits power through toothed wheels called gears. Gear drives are mostly used worldwide because of their high load carrying capacity and compact layout.