Video - COUPLING | TYPES OF COUPLINGS supplied by John Brooks

Transcript: In this video, we are discussing a device that connects two shafts, commonly known as a shaft coupling.

Couplings come in many distinctive designs and here at John Brooks, we focus on offerings from industry-leading brands.

Types of Couplings

The types of couplings offered include flexible jaw, barrelled sleeve, anti-backlash, rubber tyre, grid, and compression

Explore couplings stocked by John Brooks by following this link.

• Flexible jaw couplings, such as the Poggi GH couplings, are one of the more popular options and consist of two interlocking hubs and a polyurethane spider insert. These are particularly effective for use with AC Induction and DC motors due to their high shock absorption and ability to handle shaft misalignments along with higher speeds. Flexible jaw couplings are low maintenance with no requirement for lubrication. Different hardness levels of the plastic inserts are available.

• Barrelled sleeve couplings such as the Poggi GDR couplings are made up of two toothed hubs and an external nylon sleeve that encapsulates the coupling. Applications that require electrical insulation and ease of removal are required. Like flexible jaw couplings, these couplings are low maintenance

• Anti-backlash couplings are single piece couplings that unlike many other types of couplings are designed to minimise any angular movement or misalignment as opposed to compensating for them. The Oriental Motors MC couplings are excellent units that are perfectly suited to applications such as connecting

• Rubber tyre type couplings such as the Dodge Raptor, are comprised of a large natural rubber insert housed between two hubs. These types of coupling are particularly suited to applications where misalignments of the shafts are considerable and/or there are high shock loads and vibrations that need to be mitigated.

• Grid style couplings such as the Bibby G Flex couplings are all metal couplings that excel at protecting against shock loads and vibration. They are comprised of two hubs, a metal grid spring and external housing. Grid couplings can handle high torque loads as well as various shaft misalignments. Periodic lubrication of these units is required.

• Compression style couplings such as the Atra-Flex M1 coupling provide a stable connection while also providing a safety control aspect where the plastic insert will shear in the case of a lockup and release the driven shaft to prevent damage. A replacement insert can then be reinstalled easily without the need for any tools or removal of the hubs.

How to select a coupling?

When selecting an appropriate coupling for your application it is important to consider the following factors:

• Diameter of the driven and driver shaft
• Required torque transmission
• Amount of shaft misalignment
• Position accuracy required
• Maximum speed
• Mounting restrictions
• Ease of assembly/disassembly

John Brooks has a wide range of expertise spread across 3 branches in Auckland, Wellington or Christchurch to help assist in selecting, modifying, and delivering solutions you can trust. If you are not sure which coupling you should select for your project, contact your local branch, and a John Brooks representative will be in contact to discuss your needs and requirements.

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