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Simple Guide For Measuring Fan V-Belts

replacement-fan-belt(web

 

Replacing the belts on fans every year is a smart investment to ensure they are delivering their maximum performance. Worn fan belts can cause as much as 20% loss of cfm output.

Ordering the correct replacement fan belt is as easy taking a few simple measurements.

V Belt comparsion (web)

 

First, to determine what type of belt is on your fan, measure the width of the belt. Most fan belts are A type belts with a measurement of 1/2″. If the fan belt measures 5/8″ it is classified as type B belt. You may see a belt described as type AX. The X means it has a cogged design or notches in the belt. The cogged profile increases the power transfer and typically used for only industrial applications because of their higher cost.

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Next, you need to measure the length of the belt. Use a cloth measuring tape (not a steel one) and wrap it around the outside of the belt. You also use a thin string to take this measurement and place it on a steel tape to get the correct length.

Next, for “A” Belts (1/2” width) subtract two-inches from the outside measurement to select the correct V-belt. For example, if the outer measurement is 48-inches and you subtract two inches, then HSA46 would be the right belt for your fan.

For “B” Belts (5/8” width) subtract 3” from the outside measurement to select the correct V-Belt. For example, if the outer measurement is 48-inches and you subtract three inches, then HSB45 would be the right belt for your fan.

Hog Slat’s line of GroBelts offers producers a top quality V-belts at a great price. GroBelts feature wear resistant, high modulus compression rubber embedded with polyester cords to reduce stretch. To order go to GroBelts.

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Also, see our Laser Pully Alignment Kit. At only $14.95 it’s a great tool to accurately check the alignment of the drive pulleys while you are changing the fan belts.

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