Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
I was asked to repost this item about approximating the length of a belt that should be used on a belt driven blower assembly. In the figure, R1 and R2 represnet the radius of the drive pulley and the radius of the driven pulley. D represents the center-to-center distance between the two shafts.
Since the belt goes around approximately half of each pulley, the length needed to go around half of each pulley is equal to one-half of the circumference of each pulley, or 0.5(2)(3.14)R1, and 0.5(2)(3.14)R2. This simplifies to
3.14 (R1 + R2)
To this we add twice the center-to-center distance between the pulleys, or 2D.
So, the approximate length of the required belt is about:
2D + 3.14 (R1 + R2)
Consider this example:
Two pulleys with diameters of 4 and 6 inches, with shafts that are 12 inches apart.
The approximate belt length is:
2(12) + 3.14(2 + 3) = 24 + 15.70 = 39.7 inches.
Just to be on the safe side, have a 40" belt on hand, as well as one size up and one size down.