Couplings fall in two main categories: rigid couplings and flexible couplings. In this post, we are going to make a comparison of the main differences between the rigid and flexible couplings.
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These types of couplings provide a solid connection between two shafts, high precision and torque, but without misalignment absorption capabilities; it allows no movement between the two shafts and they require lubrication in many times. They cannot absorb vibrations, both shafts should be perfectly aligned to ensure a good performance and avoid damping transmission and possible breaks in the installation.
In the second main categories of couplings we can also make difference between two categories of flexible couplings: Flexible Metallic Couplings and Flexible Couplings with an Elastic Element.
They compensate misalignments, movement or deflection. They are very useful when having quick and short starts. Normally they provide less torque transfer, but they have a high capacity to accommodate axial, parallel and angular misalignments, as well as reducing transmission of shock loads or vibration.
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In case of the flexible couplings, they normally provide less torque transfer comparing with the rigid couplings, simply considering that these, are made of a piece of solid metal. However, we can obtain a wide range of torque capacity depending on the type of flexible coupling (having a higher torque capacity in metallic flexible couplings than in couplings with flexible element).
It is relevant to know each coupling type&#;s features when we are planning to make an installation.
It has to be verified if a coupling with a high torque transfer is required or not. In case of having even a slight misalignment, the operator should be placing a flexible coupling, and afterwards, the required misalignment capabilities should be checked to select the right flexible coupling, taking into account that it is not the same if we place a semi-flexible, elastic or a highly flexible coupling.
Rigid couplings are the simplest and most economical type of couplings, consisting of two flanges, hubs, or sleeves that are bolted or clamped together around the shaft ends. They provide a fixed and rigid connection between the shafts, without allowing any relative movement or misalignment, making them suitable for applications with precisely aligned shafts with steady and uniform loads. Rigid couplings have many advantages, such as being easy to install and maintain, compact and lightweight, reliable and durable, and cost-effective. However, they cannot accommodate misalignment between the shafts, absorb shock or torsional loads, or compensate for thermal expansion or contraction of the shafts; all of which can cause serious damage to the shafts and coupled equipment.
Contact us to discuss your requirements of Half Gear Half Rigid Couplings. Our experienced sales team can help you identify the options that best suit your needs.