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Sheave Alignment: Aim Small, Miss Small

A belt driven fan has a laser tool mounted to it to perform a sheave alignment.

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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Belt Hogs for Busses?

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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Sheave Alignment Is the First Step in Making V-Belts Last

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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V-Belt Alignment of a Variable Pitch Sheave to a Fixed Pitch Sheave

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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