0
$\begingroup$

I'm trying to design and 3d print a XL pulley. I think there is a missing dimension that I can't find in the spec tables.

we've got pitch circle, teeth height, belt thickness... but I can't find location of pitch circle relative to other two!

Is it in the middle of base belt thickness? I need the red question mark dimension.

enter image description here

$\endgroup$
10
  • 3
    $\begingroup$ (2.3 - 1.27) / 2 but the pulley diameter will be anything as long as it has a complete number of teeth... Large or small. $\endgroup$
    – Solar Mike
    Sep 3 at 10:00
  • $\begingroup$ So, it is in the middle of base belt thickness. $\endgroup$
    – 2012User
    Sep 3 at 10:47
  • $\begingroup$ Well, that is what you called it... But I don't think what you labelled is what you need. $\endgroup$
    – Solar Mike
    Sep 3 at 10:49
  • $\begingroup$ so what dimension I need? pitch circle distance to somewhere... any where. $\endgroup$
    – 2012User
    Sep 3 at 11:11
  • $\begingroup$ Dimensions of the driver pulley and the gear ratio, then you can calculate the size of the driven pulley which you want to make. $\endgroup$
    – Solar Mike
    Sep 3 at 11:27
1
$\begingroup$

What you want is called the belt's neutral axis. The neutral axis is what coincides with the pulley's pitch circle. You have to look this up for each belt, because it depends on the way the belt is made.

But if this is a synchronous belt and pulley system, you are doing things backwards. The pulley profile is the established standard, and the belt guys have to make their different belt types all work with the same pulley. But buy belts and pulley from same manufacturer if you want any real hope of success with high speeds and loads.

https://us.misumi-ec.com/vona2/detail/110300405510/

$\endgroup$
1
  • $\begingroup$ I am going to 3d print the pulley. So I can use any belt I can find since I can change the pulley dimensions. $\endgroup$
    – 2012User
    Sep 5 at 17:14

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.