How To Measure V Belt Size Formula

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Caster belts, also known as V-belts, are prophylactic belts wrapped around a set of pulleys that transmit force equally an engine rotates the pulleys. In society to supercede or install the proper chugalug for your pulleys, you lot need to accept an authentic measurement of the length then you tin can choose the correct 1. Fortunately, measuring a pulley belt size is easy to do. If yous already have a belt that you demand to measure, you lot tin utilise a flexible measuring tape or read the chugalug codes. If yous don't accept an existing belt to measure, you tin can utilise the pulleys themselves to find the correct size.

1
Mark a line across the chugalug with a white marker. Hold the belt in 1 hand and take a white marking or a piece of chalk and marking a line on the outside of it. Make the line all the way across the width of the belt.^[1]
- Make sure the line is thick enough to be visible and won't rub off also easily while you lot're measuring.
2
Line upward a measuring tape with the line on the chugalug. Apply a flexible tape measure out and then you tin can wrap it effectually the surface of the belt. Line up the end of the record where the measurements begin with the line you marked on the chugalug.^[2]
- Make certain the marker is lined upwards exactly where the measurements brainstorm, rather than with any metallic clasp or plastic that may be on the terminate of the measuring record.
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3
Wrap the measuring record around the chugalug until it meets the mark. Use 1 hand to hold the record measure in place while y'all wrap information technology around the belt. Go on it flush with the surface of the belt and make sure there aren't any folds or creases that could affect your measurement. Proceed wrapping the tape measure until it meets the other end.^[3]
- Keep tension on the measuring tape so your measurements are accurate.
Alternative: You tin can likewise utilise a long ruler or a steel tape measure to measure out the pulley belt by lining upward the mark with the beginning of the ruler or tape measure, and and then rolling the belt until the line comes back to its original position. However, this method may not be equally precise.
4
Hold your finger where the record meets the mark and note the distance. Once you lot've wrapped the measuring tape effectually the belt, use your alphabetize finger to marking where they meet and and then remove it. The indicate where they come across is the size of the pulley belt.^[4]
- You can make a marking on the measuring tape or write down the measurements so y'all have them for future reference.
Tip: If your pulley belt is one-time or worn, information technology may accept stretched a pocket-size amount. If you programme to replace it, choose a chugalug that is near 0.5 inches (1.iii cm) smaller than your measurement so information technology fits snugly onto the pulleys.

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1

Apply string if the belt is on the pulley or if there is no belt. If you're trying to find the size of a chugalug that is connected to pulleys without removing it, use a roughly 4 ft (1.2 g) long piece of string. You can also use string to notice the belt size using the pulleys themselves if in that location is no belt.^[5]

Tip: You lot can utilize either string or rope to find the chugalug size using the pulleys, but if you take a rope that's the judge thickness of the grooves in the pulleys, it volition be easier to agree in identify while you mensurate.
ii
Hold 1 finish of the string on pinnacle of the belt or ane of the pulleys. Take the end of the string and choose a pulley to place it on top of. Utilize 1 hand to hold the string in place and then information technology doesn't movement when you take your measurements.^[6]
- Information technology doesn't thing which caster you cull, whether you lot have a belt attached to it or non.
iii
Wrap the string around the pulleys until it meets the other end. Keeping the end of the string held confronting the pulley, bring the string effectually the other caster until it meets it. Maintain tension on the cord so its taut.^[7]
- Use your hand to hold the string so information technology's continued to the end.
4
Mark the cord where it meets the other end and remove it. Employ a marking to make a line on the string where it meets the stop on the pulley. So, take the string off of the pulleys.^[8]
- Make certain the marking is visible on the string.
5

Lay the cord flat and measure the distance between the stop and the marker. Place the string on a flat, even surface and stretch it out and then it's directly and taut. Employ a ruler or record measure to measure the distance from the end of the string to the marking you lot fabricated to find the size of the pulley belt.^[9]

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1
Inspect the surface of the belt to expect for a lawmaking printed on it. If you take the chugalug that you need to measure out, check the outer surface for a code printed in white letters. Look for a series of letters and numbers that are repeated in multiple locations along the belt.^[10]
- If you don't take a belt to mensurate, yous'll need to use the pulleys to determine the belt size.
- If the belt is really worn, yous may not exist able to see the code printed on the surface. If that's the case, you'll demand to measure the belt itself.
2
Look for an A, B, C, D, or Due east in front of the code to place a classical belt. A classical belt is the most mutual type of pulley belt and uses the messages A-Eastward in the prefix to identify a specific peak width and depth. Classical chugalug codes are designated past the inside circumference. Then to detect the caster belt length, you need to add the width of the belt to the circumference measurement designated in the belt code.^[11]
- If you're replacing your pulley belt, choose a replacement that has the aforementioned prefix then you lot know information technology fits the pulleys.
Classical belt measurement tips:

Add 2 inches (5.1 cm) to an A prefix, 3 inches (7.six cm) to a B prefix, 4 inches (10 cm) to a C prefix, 5 inches (13 cm) to a D prefix, and 6 inches (15 cm) to an E prefix. For instance, if the belt has a code like A34, then the outside circumference of the belt is 36 inches (91 cm).
three
Identify an FHP belt by a 3L, 4L, or 5L prefix on the code. Fractional horsepower belts, or FHP belts, are often found in appliances and minor machines. Look for the prefix that identifies an FHP chugalug in the belt code. FHP belt codes designate the outside circumference measurement of the belt. To find the length of the chugalug, utilize the number following the FHP belt prefix.^[12]
- For case, if the belt lawmaking reads, "4L360," then the chugalug is 36 inches (91 cm) long.
- Cull a replacement FHP with the same prefix and so it fits the pulleys properly.
4
Notice a 3V, 5V, or 8V prefix to identify a Deep Five-belt. Deep V, also known as narrow belts, are thicker than classical belts and are often used in compact drives. Their codes identify the outer circumference of the belt, so to find the length, wait for the number that follows the prefix for an accurate measurement.^[13]
- For instance, if the code on the belt looks like, "5V280," so the belt length is 28 inches (71 cm).
- Choose a chugalug with the same prefix if yous programme to replace your Deep V-belt.
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If yous're measuring the size of a caster belt by using the pulleys themselves, try using a rope that fits into the grooves on the pulley so you can have a more accurate measurement.
Utilize your measurements to assistance yous cull the proper replacement chugalug if your current belt is frayed or damaged.

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