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Belt Size

Al Letellier_9
Al Letellier_9 Member Posts: 929
in THE MAIN WALL
Keep a Grainger catalogue in your truck...has many of those formulas in the back...great reference tool

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Comments

  • Wayne_17
    Wayne_17 Member Posts: 24
    Belt size

    Any one know the formula for finding the right size drive belt. Also any links to any HVAC, mechanical equations/formulas etc would be appreciated
  • Eugene Silberstein 3
    Eugene Silberstein 3 Member Posts: 1,380
    Down and dirty

    Here you go:

    1 - Measure the center-to-center distance between the drive and driven shafts

    2 - Mulitply the result in "1" by 2

    3 - Measure the effective diameter of the drive and drvien pulleys (By effective I mean the diameter of the smallest pully that can be used to accomodate the belt at its present position in the pulley)

    4 - Plug the pulley diameters into the following:

    3.14 x (D1 + D2) / 2

    5- Add the result from #4 to the result from step #2. This will give the approximate belt length you will need.

    The further the shafts are from each other, the more accurate this estimate will be.
  • J.C.A._3
    J.C.A._3 Member Posts: 2,980
    OR....

    The way I was taught "back in the day"...Take a piece of clothesline and string it around the pully's, with the motor adjusted somewhere near the lower end of the adjustment. Measure the lenth and VIOLA !

    The math is easy but this hasn't failed me yet.(Sometimes it's quicker too!).

    Sorry Eugene, Some things are just simpler than MATH!) Chris
  • Wayne_17
    Wayne_17 Member Posts: 24
    Thank

    you, I have it somewhere but when I needed it the most I could not find it. So now I am trying to put together all the formulas and equations I can find for my laptop so they will be there when needed.
  • Eugene Silberstein 3
    Eugene Silberstein 3 Member Posts: 1,380
    No need to be Sorry

    I've been known to "string it" every now and then!
  • Wayne_16
    Wayne_16 Member Posts: 130
    pulley dia

    > Any one know the formula for finding the right

    > size drive belt. Also any links to any HVAC,

    > mechanical equations/formulas etc would be

    > appreciated



  • Wayne_16
    Wayne_16 Member Posts: 130
    pulley dia

    Measure the effective pulley dia times 1.57, do this for both pulleys, then measure the shaft center to center distance times 2. Add the 3 numbers together to arrive at belt length.

    We used this many times in the farm equipment business.
  • Eugene Silberstein 3
    Eugene Silberstein 3 Member Posts: 1,380
    I Thought....

    I thought that's what I said ?!
  • Richard Miller
    Richard Miller Member Posts: 72
    Belt size...

    Seriously guys... you don't wanna know my belt size. It's why i had to mostly quit the trade.
  • CHARLES_4
    CHARLES_4 Member Posts: 61
    Belt size

    Great--now we need a conversion chart from belts to suspenders...
This discussion has been closed.

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