While V-belt sheave alignment tolerances are not as precise as tolerances for precision shaft alignment, they are important. Proper sheave alignment (along with correct belt tension and proper ventilation) will: Increase Belt and Sheave Life Minimize Vibration Reduce Heat (Friction) from V-belt/Sheave Contact Types of V-Belt Misalignment Just like for shaft alignment, there are…
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V-belts are cheap, right? That’s what most people in industry think, but a dumpster full of worn-out belts represents a good amount of money. Not only that, but the time required to change belts, along with any downtime, can be significant. Make Belt Drives Efficient Belt drives need four things to make them efficient: Proper…
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A customer recently called saying his Belt Hog Sheave Alignment Tool was out of calibration. He stated that when he placed the Belt Hog lasers in the sheave grooves, they showed a slight amount of misalignment. However, when he rotated the lasers 180 degrees to check, there was a variance of 3mm (0.118”). While this…
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Proper belt installation and tensioning and sheave alignment are essential in order for a facility to function at optimum efficiency. A key thing to understand when it comes to belts is proper sizing. Whether you are using a correctly-sized belt for your machine will have a significant impact on the machine’s ability to function at…
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A creative application for the VibrAlign Belt Hog sheave alignment tool has paid off for New Flyer of America and one of its customers, King County (Seattle, WA) Metro Transit Division Fleet Engineering and Vehicle Maintenance. New Flyer is a major manufacturer of heavy-duty buses in the U.S. and Canada. The Belt Hog is…
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VibrAlign recently released an excellent “how-to” video on its You Tube channel. This video explains not only how to use the VibrAlign Belt Hog laser sheave/pulley alignment tool, but also introduces the 3 concepts of sheave misalignment and how to correct them. https://www.youtube.com/watch?v=NmtMGikWApw However proper sheave alignment is only one step in making belts last. …
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Variable pitch sheaves are used frequently in air handlers. They allow the design engineer to increase or decrease the speed of the driven machine. In doing so, they allow for: Changes in amp draw of the motor, to maximize efficiency, Increase or decrease static pressure and air flow. Normally, the design engineer will specify the…
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