Top 12 Rigid Couplings

Couplings are an indispensable mechanical element found in most heavy-duty machinery & tools and is used to connect the shafts, thereby transmitting torque (power) and absorbing misalignment. However, rigid couplings do not have a flexible component which makes them suitable only for instances where the two shafts are already perfectly aligned/operating as a single shaft – as it does not leave room for motion between the shafts. If one uses a rigid coupling when the shafts are not in close alignment, it will most likely cause extensive damage or premature failure.

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Rigid Couplings Buying Guide

There are mainly three types of rigid couplings – flanged, clamp, and sleeve, and it is vital to understand the difference between the three, which will be explained later. Although rigid couplings have a wide range of uses, they are most suitable for vertical applications, such as a machine with a vertical water pump. Besides zero misalignment absorption capabilities, one other disadvantage of a rigid coupling is that it requires constant lubrication. But there is much more a buyer should know and consider before buying rigid couplings – that this comprehensive buying guide will cover.

The Types of Rigid Couplings

A flanged rigid coupling consists of two parts, each located on opposite ends of the driven shaft and needs to be attached to function. But a flanged coupling is only applicable for vertical pump shafts instead of regular ones. Similarly, even clamp rigid couplings are primarily used for vertical applications and work by being clamped (hence the name) over the driven & driver shafts’ adjoining ends. Lastly, rigid sleeve couplings are a single-piece sleeve and are used when flexibility between the two shafts isn’t required – making them better suited for light and medium-duty applications.

Ensure the Quality is Top-Grade

Whether you are using rigid couplings for light or heavy-duty applications doing a quality check is of utmost importance to avoid malfunction or damage to the machinery. The first thing to consider is the material used, and the common ones include aluminium, brass, and steel (stainless or high-carbon). Even though all three are appropriate choices, aluminium and steel rigid couplings are most widely used due to their excellent conduction properties and durability. Additionally, buyers should go for couplings with superior corrosion resistance, that can withstand over time wear and tear, and have a long service life. 

More One Must Consider

Based on the requirement at hand, buyers should select the rigid couplings’ size by checking the dimensions of the inner & outer diameter plus the length. Similarly, buyers must consider the rigid coupling’s tolerance rate, primarily if used for heavy-duty applications. It is better to go with couplings that come with all necessary screws and tools for quick setup – and should not require major disassembly for installation. If you are not too sure about whether the coupling is suitable for the desired purpose – it is better to read other customer reviews for a better idea. 

Categories Simillar to Rigid Couplings

Categories Simillar to Rigid Couplings includes Shaft Collars, Universal Joints