Installation overview: Even if a coupling is properly selected, poor installation can cause failures; staying within the recommended misalignment ratings of that coupling at installation is critical. Here, we will cover several coupling types and what to be careful of during installation. Always be sure the coupling is used within the manufacturer’s ratings. Use a […]
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Environmental considerations for coupling selection: fast facts
It takes more than just specifying size, speed rating, and torque range to assess the right coupling for an application. One of the most important factors is a coupling’s operating environment. The conditions a coupling will face can have a drastic impact on efficiency and service life. To learn more about a few environmental consideration […]
Misaligment: The concerns you need to know about
Edited by Mike Santora Why misalignment is a concern: Because not properly accounting for it can lead to premature coupling or system component failure. It also introduces RPM limitations, vibrations and noise, and potential for damage or injury. Most systems are going to have some type of misalignment. Some of the common causes of misalignment […]
Fail-safe versus a fuse type couplings
Edited by Mike Santora Understanding how a coupling may fail is critical during the design process. Oldham couplings are a fuse type coupling and power transmission will stop upon failure. A jaw type coupling are fail safe as the tenons will interlock and continue power transmission. Depending on your application you may want a fuse […]
What is electrical isolation?
What is electrical isolation? Electrical isolation is used to separate drive and driven components to prevent extraneous electrical currents from being passed between them. Specifying the wrong coupling or not understanding how a specific coupling fails can lead to electrical currents inadvertently being passed between components. You see electrical isolation in mostly encoder and instrumentation applications […]
What’s the difference between windup and backlash?
In this excerpt from a recent webinar with Robert Watkins, VP of Sales for Ruland Manufacturing, we learn about the key differences between windup and backlash. Watkins also touches on how to help deal with both. Here is what he had to say: Windup is often confused with backlash; they are not the same. Backlash […]
How NOT to select a coupling for your next application
Common coupling selection errors happen all the time. Some more than others. Here, Robert Watkins, VP of Sales for Ruland Manufacturing, tells us about a few he’s seen and should be avoided at all costs. In one dampening application, we saw a food processing OEM who had a hard start, hard stop, aggressive move profile. […]
Coupling duty cycle considerations you need to know
Edited by Mike Santora The importance of a coupling’s duty cycle is sometimes overlooked specifically because it should go without saying. With certain types of motion: continuous, start stop, reversing- engineers must look at a coupling’s static torque number, take it into consideration, and then de-rate it. For example, how often a system is running […]
How do speed and inertia affect beam couplings?
Edited by Mike Santora Beam coupling failure most often occurs when maximum speed is exceeded. Making a balanced design all the more important at higher RPM. In certain situations, such as a printing application for example, there might be an issue with banding. Vibration in the system can be caused by the coupling, causing the […]
What does a bellows coupling torque failure look like?
We all know the value of an ounce of prevention. But what if the wrong bellows coupling has already been installed unbeknownst to you? Can you recognize warning signs before a complete coupling failure? Sometimes you can says Robert Watkins of Ruland Manufacturing. With bellows coupling torque failure, you can often see a deformation in […]