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Post by Drummond Island Rocks on Sept 20, 2018 7:15:19 GMT -5
I just did it my way and came up with a 38.25" belt. Works better than the calculator. Not dead on, but I've found it to be very close on many projects, and it's easy. 1/2 of each pulley circumference [on outside, or marked diameter] + twice the c-to-c of the shafts. That works fine for pulleys that are similar in diameter but the more drastic the size difference between pulleys changes the tangents where the pulley touches the belt. When I made my tumbler which has 10 belts I had all of my pulleys and belts in my CAD file. With the CAD file I can measure the overall length of my belts. I have used the same calculator as mentioned above before and it always matches my CAD drawings. Look to the right where it says length. That is the length of the red line in my CAD file. This is the calculator using the same 2 pulleys at the same distance away 1/2 the circumference of 2 is 3.14", 1/2 the circumference of 10 is 15.707" and center to center x 2 is 20" that total only comes to 38.84" Chuck
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