Play it safe: Install quality couplings

Couplings take a lot of the stress off other moving parts; but by doing so, they are prone to wear and breakage. Under pressure, even a stationary pipe coupling can release one of the pipes it holds. Coupling failure creates production slowdown, machine damage and potential hazards for the people who work around machinery. Besides smart and safe overall machine design, installing couplings of adequate quality is safe and money-wise. When choosing a coupling don't limit your search to dimension and fit. Temperature, pressure and vibration levels, load and torque capabilities and corrosion resistance are all important factors. Estimate the harshest conditions your application might put on a coupling, then select one that exceeds those values.

I recommend: For an example of what you'll be looking for, scroll down Omega Engineering's page on high temperature brass couplings.

Shop the best sources for couplings

With so many kinds of couplings, you'll need to find the right source to fit your needs.

I recommend: As usual, Grainger comes closest to having it all. Climax Metal Products Company specializes in-collar and rigid couplings. Shop Straub for a pipe coupling. Mesa Systems Company is an excellent source for electrical couplings. The Precision Alliance isn't the right source for all flexible couplings, but it provides high-quality parts. If you need a quick coupling, check out the TradeKey directory.

Maintain your couplings

Many couplings are designed with a definite lifespan. Other, high quality, couplings are made to last indefinitely. Some couplings even have seals over their moving parts to prevent corrosion and keep out dirt. However, even quality couplings require maintenance or even part replacement.

I recommend: Pay attention to manufacturer information. Direct Industry, for instance, provides information on their website and sends instructions along with every jaw coupling shipment. Also, take a look at the troubleshooting guide at Richards Co.