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Damaged timing belt in shipping

Discussion in 'Technical Q&A' started by Martin8, Oct 11, 2007.

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  1. Martin8

    Martin8 Rookie

    Sep 26, 2007
    19
    St. Charles, IL
    Full Name:
    Marty Davis
    #1 Martin8, Oct 11, 2007
    I am new to this forum. My question is can the looped end of a timing belt be crushed or radius be bent too small to safely use a new belt? I just received my timing belts in the mail and they were in a small 6.5" X 9" X 3" box with my two timing belts looped together and then the belts folded with the very heavy tension bearings in the middle if the fold. The tension bearings were wrapped in bubble wrap but they weigh at least a pound if not more. I don't think the sender realized how much damage those two heavy tension bearings could to to the folds at the ends of the timing belts. For almost a week they were thrown around in the mail. I have always read the they should never have their radius bent too small. The belts would have easily been squashed to the diameter of half inch or less! To be safe should I throw these belts out and get new? No guessing please. Does anyone know how small the radius can be on these belts? Am I right that they could have been damaged? Thanks
     
  2. smg2

    smg2 F1 World Champ
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    Apr 1, 2004
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    SMG
    #2 smg2, Oct 11, 2007
    actually, yes the belts internal construction can be damaged by bending them in too small a radius. the engineering book i have from gates on belts shows the belt to have a minimum dia. of 1.432", any smaller and the internal threads will break. So if the belt was bent into a loop smaller than the lower pulley I would not use them.
     
  3. Valence

    Valence Formula Junior

    Jan 20, 2004
    883
    Charlottesville, VA
    Full Name:
    Chris& Brian Coffing
    #3 Valence, Oct 12, 2007
    I would not use them. Sounds like potential internal delamination (even if you can't see it). Ask the tech support at the belt manufacturer too - you might learn something and I could certainly be wrong.
     
  4. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,220
    Mount Isa, Australia
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    Pap
    #4 PAP 348, Oct 12, 2007
    Good info here. :):)

    Belt should be tossed asap and replaced with a new one. :):)
     
  5. Ricambi America

    Ricambi America F1 World Champ
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    Dec 7, 2003
    16,448
    Winston Salem, NC
    #5 Ricambi America, Oct 13, 2007
    That seems pretty tight. TR belts might be ok, because they're way more flexible and shorter. A 348 belt, too long. 355/360 belts are super stiff because of the kevlar backing.
     
  6. Ricambi America

    Ricambi America F1 World Champ
    Sponsor Owner

    Dec 7, 2003
    16,448
    Winston Salem, NC
    #6 Ricambi America, Oct 13, 2007
    I think that might apply when the belt is under tension, not at rest -- but I'm not an engineer. Dayco uses a surprisingly small box to package their belts from the factory -- I'd say it's about 8" x 5" x 1".
     

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