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  1. #1
    Quote Originally Posted by Robin Hewitt View Post
    Wonder if I could turn a 5.08mm pitch pulley down a tadge. The 5mm tooth seems a pretty good fit in that.
    24t * .08mm / Pi = 0.61mm off the diameter. Might work. Or am I completely getting the sum wrong?
    It is not that simple to get the pulley tooth size. You have the pitch line, which corresponds to the belt insertion, where the belt bends. From there you calculate the gap between the teeth to correspond to the belt teeth dimension. The teeth on a smaller diameter pulley are narrower than those on a bigger diameter...

    If you tension enough the belt you'll have no backlash even with a smooth belt. The teeth are there for timing ... at times

  2. #2
    Quote Originally Posted by paulus.v View Post
    It is not that simple to get the pulley tooth size. You have the pitch line, which corresponds to the belt insertion, where the belt bends. From there you calculate the gap between the teeth to correspond to the belt teeth dimension.

    But it looks like it might go, a small change in radius gives you 6 times as much off the circumference...

    Click image for larger version. 

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  3. #3
    Quote Originally Posted by Robin Hewitt View Post
    But it looks like it might go, a small change in radius gives you 6 times as much off the circumference...

    Click image for larger version. 

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    got my belt and pulley from cnc4you they match perfect, kev

  4. #4
    Quote Originally Posted by kev20009 View Post
    got my belt and pulley from cnc4you they match perfect, kev
    Momentary hope, but they have nothing to fit my 15mm wide belt.

    I think I might try 3D printing a pulley. Well, why not?

  5. #5
    Quote Originally Posted by Robin Hewitt View Post
    Momentary hope, but they have nothing to fit my 15mm wide belt.

    I think I might try 3D printing a pulley. Well, why not?
    Is there a reason you bought pulleys and belts from different suppliers?
    You think that's too expensive? You're not a Model Engineer are you? :D

  6. #6
    Quote Originally Posted by magicniner View Post
    Is there a reason you bought pulleys and belts from different suppliers?
    I don't think it matters where you buy them, the spec for the T5 pulley has 0.6mm of slop. I presume there is a good reason for this and it was not done simply to piss me off

  7. #7
    Quote Originally Posted by magicniner View Post
    Is there a reason you bought pulleys and belts from different suppliers?
    They do 16mm wide belt and pulley, so these pulley suite your needs,

  8. #8
    Quote Originally Posted by kev20009 View Post
    They do 16mm wide belt and pulley, so these pulley suite your needs,
    I tried to buy one but it did not go well. The shipping estimate didn't work. I soldiered on, didn't flinch when one pulley plus shipping came to £14.23, typed in all my details, took the PayPal option. A message came up, PayPal not available and they wanted me to start typing all over again. I just don't have the stamina I used to

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