PARALLEL KEY Meaning and
Definition
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A parallel key refers to a type of fastening device used in machinery and mechanical assemblies to securely connect rotating components such as shafts, pulleys, gears, or couplings. It is designed to transmit torque or rotational force between the components while ensuring proper alignment.
A parallel key typically consists of a rectangular metal strip that is inserted into machined slots, known as keyways, on both the shaft and the component to be attached. The keyway on the shaft is slightly wider than the key strip to allow for easy insertion and alignment. The key strip is then driven into position, filling the keyway on the shaft and fitting precisely into the corresponding keyway on the component. This snug fit prevents any slippage or relative movement between the two parts during operation, effectively eliminating rotational play and providing a solid connection.
The parallel key serves as a mechanical linkage, transferring power or torque from the rotating component to the shaft, enabling the latter to drive or be driven by the component. It helps maintain the alignment of the connected parts and prevents any relative shifting that may cause damage or inefficiency in the system.
The parallel key is widely used in various industries, including automotive, manufacturing, construction, and heavy machinery, and it is available in different sizes and materials to suit diverse applications. Proper installation and sizing of the parallel key are crucial for ensuring the reliable and efficient operation of the machinery or assembly.
Etymology of PARALLEL KEY
The term "parallel key" is derived from the combination of two separate words: "parallel" and "key".
The word "parallel" comes from the Latin word "parallelos", which is derived from the Greek word "parallēlos". In Greek, "para" means "beside" or "alongside", and "allēlos" means "one another". So, the original meaning of "parallel" relates to something that runs alongside or remains at an equal distance from something else. This idea is often used to describe lines or objects that remain equidistant throughout their entire length. In the context of a "parallel key", the term is used to describe a type of musical key that is related or equivalent to another key.
The word "key" has multiple origins and meanings, but in this context, it refers to a specific musical key.
