A coupling is a device used for connecting two shafts together at their ends for the intended purpose of transmitting power.
Couplings usually do not normally allow disconnection of shafts during operation, however there are torque limiting couplings that may slip or disconnect when some torque limit is exceeded.
The primary purpose of couplings is to become listed on two bits of rotating equipment while permitting some degree of misalignment or end movement or both.
By careful selection, installation and maintenance of couplings, substantial savings can be manufactured in decreased maintenance costs and downtime.
3 main types of couplings:
1. Rigid coupling a rigid coupling can be a unit of equipment used to become listed on two shafts within a motor or mechanical system. It might be used to connect two separate systems, such as a motor and a generator, or even to restoration a connection within an individual program. A rigid coupling can also be added between shafts to lessen shock and use at the point where the shafts meet.
When joining shafts within a machine, mechanics can choose between flexible and rigid couplings. While flexible units give some movement and present between the shafts, rigid couplings will be the most effective choice for specific alignment and secure hold. By specifically aligning both shafts and holding them firmly in place, rigid couplings help to maximize performance and raise the expected existence of the device. These rigid couplings can be found in two basic styles to fit the demands of different applications. Sleeve-style couplings are the most affordable and easiest to use. They consist of an individual tube of material with an inner size that’s equal in proportions to the shafts. The sleeve slips over the shafts therefore they fulfill in the middle of the coupling. A number of set screws can be tightened therefore they touch the very best of every shaft and keep them set up without passing completely the coupling.
Clamped or compression rigid couplings can be found in two parts and fit together around the shafts to create a sleeve. They provide more flexibility than sleeved models, and can be utilized on shafts that are fixed in place. They generally are large enough to ensure that screws can pass completely the coupling and into the second half to ensure a secure hold.
Flanged rigid couplings are made for large loads or commercial equipment. They contain short sleeves encircled by a perpendicular flange. One coupling is positioned on each shaft so the two flanges fall into line face to face. A series of screws or bolts can then be installed in the flanges to carry them jointly. Because of their size and durability, flanged models can be used to provide shafts into alignment before they are joined up with together. Rigid couplings are used when specific shaft alignment is required; shaft misalignment will impact the coupling’s performance and also its life.
2. Flexible coupling flexible couplings are accustomed to transmit torque in one shaft to some other when both shafts are slightly misaligned. Versatile couplings can accommodate varying examples of misalignment up to 3° plus some parallel misalignment. In addition, they may also be utilized for vibration damping or sound decrease.This coupling can be used to safeguard the driving and driven shaft members against harmful effects produce due to misalignment of the shafts, sudden shock loads, shaft expansion or vibrations etc.
3. Torque limiter coupling made to slip the torque out of the shaft to prevent harm to the engine or the application form

What’s the difference between rigid coupling and flexible coupling?
Couplings are divided into types: Rigid and Flexible. As compared withflexible couplings, rigid couplings have limited software. Rigid couplings do not have the ability to compensate for shaft misalignments and are therefore used where shafts are already positioned in specific lateral and angular alignment.
What are the advantages of flexible coupling?
Flexible couplings accomplish the objective of any coupling, but their advantageover rigid couplings is usually they accommodate the unavoidable misalignment between shafts in some machinery. Versatile couplings also allow for a amount of axial movement between your coupled shafts as may occur due to thermal expansion.
What exactly are the types of coupling?
What is Coupling? Types of Shaft Couplings
Rigid Couplings.
Flexible or Compensating Couplings.
Clutches to certainly are a kind of Coupling – We will the working on them separately.
Flanged Pin Bush Couplings.
Bibbly Coupling.
Gear Tooth Coupling.
Tyre couplings.
Elastomeric Couplings – This consists of jaw type and S-flex couplings.
Couplings are devices used for connecting two shafts together and so are divided into two categories: Rigid and Flexible. Both are utilized for the objective of transmitting power, rigid couplings becoming more limited in applications when compared with versatile couplings. Rigid couplings are used where shafts are already positioned in precise lateral and angular alignment. Their design will not enable any misalignment between shafts, but are usually able to transmit even more power than versatile couplings. Versatile couplings are created to accommodate misalignment between shafts and various types of load conditions. Many styles and types of couplings can be found. For effective coupling selection, application conditions should be clearly understood.