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Bbambino1976

  • one year ago

This is the deal, I have two pulleys with a radii of 10.0in. and 6.00in., and their centers are 40.0 in. apart. If the pulley belt is uncrossed, what must be the length of the belt? Can somebody pull me to the side and please explain this to me, I also have a couple questions about this.

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  1. Jbo11
    • one year ago
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    |dw:1383415570075:dw|

  2. Jbo11
    • one year ago
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    |dw:1383415705475:dw|

  3. Jbo11
    • one year ago
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    if so, here is a great step by step explanation http://frentzandsons.com/Hardware%20References/tofindthebeltlength.htm

  4. Bbambino1976
    • one year ago
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    thank-you very much.

  5. Jbo11
    • one year ago
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    ok maybe bad example So in this you have two circles, you need to know the equation for the circumference of the circle which is 2pir^2 and use only half because the belt covers only half the circles then add the middle which is 40 but times by two because there's two lengths of it

  6. Bbambino1976
    • one year ago
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    before you go any farther, that site you gave to my is great. I've got the belt length needs to be 81.57inches. Did I do it right?

  7. Jbo11
    • one year ago
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    I got 131.2

  8. Jbo11
    • one year ago
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    so you use the diameters which are twice the radii so 20 and 12 add them, then multiply by 1.6, then add 40 twice

  9. Bbambino1976
    • one year ago
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    thats what i did wrong. i put the radii , not the diameter.

  10. Jbo11
    • one year ago
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    ah, yup, well as long as you understand the problem, little fixes like that can be checked and fixed

  11. Bbambino1976
    • one year ago
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    so how does the equation go??

  12. Bbambino1976
    • one year ago
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    2radii + 1/2pie +2length

  13. Jbo11
    • one year ago
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    yea

  14. Bbambino1976
    • one year ago
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    drum roll please........... I got belt length of 113.5in.

  15. Bbambino1976
    • one year ago
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    pellet it's not the same, what did I do wrong?

  16. Jbo11
    • one year ago
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    Oh ok your equation should be like (2radii+2radii)*1/2pi+2length

  17. Bbambino1976
    • one year ago
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    Would'nt you call that the circumference

  18. Jbo11
    • one year ago
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    yup, you are using half the circumference and then adding the length between the two pullys

  19. Bbambino1976
    • one year ago
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    half the circumference of each pully, so it be 32radii?

  20. Jbo11
    • one year ago
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    yea then times 1/2pi and add 80 gives you 131.2

  21. Bbambino1976
    • one year ago
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    thank-you so much.but I'm getting 130.27

  22. Bbambino1976
    • one year ago
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    I just recalculated and came up wth 131.2

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