A coupling is a gadget used to connect two shafts collectively at their ends for the intended purpose of transmitting power.
Couplings do not normally allow disconnection of shafts during procedure, however there are torque limiting couplings which can slip or disconnect when some torque limit is exceeded.
The primary purpose of couplings is to join two pieces of rotating equipment while permitting some extent of misalignment or end movement or both.
By cautious selection, installation and maintenance of couplings, substantial savings can be manufactured in reduced maintenance costs and downtime.
3 main types of couplings:
1. Rigid coupling a rigid coupling is definitely a unit of hardware used to become listed on two shafts within a motor or mechanical program. It might be used to connect two separate systems, such as a engine and a generator, or to repair a connection within an individual program. A rigid coupling may also be added between shafts to reduce shock and wear at the main point where the shafts meet.
When joining shafts within a machine, mechanics can select from flexible and rigid couplings. While flexible units offer some movement and give between the shafts, rigid couplings are the most effective choice for precise alignment and protected hold. By exactly aligning the two shafts and holding them firmly set up, rigid couplings help maximize performance and raise the expected existence of the device. These rigid couplings can be found in two basic styles to fit the needs of different applications. Sleeve-style couplings are the most affordable and easiest to make use of. They consist of an individual tube of material with an inner diameter that’s equal in size to the shafts. The sleeve slips over the shafts therefore they meet in the middle of the coupling. A number of set screws can be tightened so they touch the very best of each shaft and keep them set up without passing completely the coupling.
Clamped or compression rigid couplings can be found in two parts and match together around the shafts to form a sleeve. They offer more flexibility than sleeved models, and can be used on shafts that are set in place. They often are large enough to ensure that screws can move all the way through the coupling and into the second half to ensure a secure hold.
Flanged rigid couplings are made for weighty loads or commercial equipment. They contain short sleeves encircled by a perpendicular flange. One coupling is positioned on each shaft therefore the two flanges line up face to face. A number of screws or bolts can then be installed in the flanges to carry them together. Because of their size and durability, flanged products can be used to provide shafts into alignment before they are joined collectively. Rigid couplings are utilized when exact shaft alignment is necessary; shaft misalignment will influence the coupling’s performance in addition to its life.
2. Flexible coupling versatile couplings are used to transmit torque in one shaft to another when the two shafts are somewhat misaligned. Flexible couplings can accommodate varying examples of misalignment up to 3° plus some parallel misalignment. In addition, they may also be used for vibration damping or sound decrease.This coupling is used to protect the driving and driven shaft members against harmful effects produce because of misalignment of the shafts, sudden shock loads, shaft expansion or vibrations etc.
3. Torque limiter coupling designed to slip the torque out from the shaft to prevent damage to the engine or the application form

What’s the difference between rigid coupling and flexible coupling?
Couplings are divided into categories: Rigid and Flexible. In comparison withflexible couplings, rigid couplings possess limited software. Rigid couplings don’t have the capability to compensate for shaft misalignments and so are therefore used where shafts are already positioned in exact lateral and angular alignment.
What are the benefits of flexible coupling?
Versatile couplings accomplish the purpose of any kind of coupling, but their advantageover rigid couplings is definitely they accommodate the unavoidable misalignment between shafts in a few machinery. Flexible couplings also allow for a amount of axial movement between the coupled shafts as might occur due to thermal expansion.
What are the types of coupling?
What is Coupling? Types of Shaft Couplings
Rigid Couplings.
Flexible or Compensating Couplings.
Clutches to are a type of Coupling – We can the dealing on them separately.
Flanged Pin Bush Couplings.
Bibbly Coupling.
Gear Tooth Coupling.
Tyre couplings.
Elastomeric Couplings – This contains jaw type and S-flex couplings.
Couplings are devices used for connecting two shafts together and are divided into two groups: Rigid and Flexible. Both are used for the purpose of transmitting power, rigid couplings getting more limited in applications in comparison with versatile couplings. Rigid couplings are used where shafts are already positioned in exact lateral and angular alignment. Their design does not allow for any misalignment between shafts, but are usually able to transmit even more power than flexible couplings. Flexible couplings are designed to accommodate misalignment between shafts and different types of load conditions. Many designs and types of couplings are available. For successful coupling selection, application conditions must be clearly understood.