For curiosity sake I'm trying to design a sprocket in CAD, partly to pass time and learn and partly for the fun of it.
I have precision calipers that I have used to measure brand new KMC chains I own.
The obvious mistake that http://www.gizmology.net/sprockets.htm has made is mixing up the with/without derailleur headings as geared bike chains have inner plate widths of 3/32 (<9sp) or 11/128 and it is only the outer plate widths that differ between 9/10/11sp.
The thing that is also in conflict with my measurements is bicycle chain roller diameter stated as 5/16 or 0.3125" which is at odds with my measure of 0.306" or rather in agreement with a size 41 ANSI chain in that respect but differs in others....
Everywhere I read about bicycle chains it says conflicting info, most incorrectly quote 3/32 as the standard for anything geared.... totally oblivious to 11/128.
I'm inclined to use this guide to fashion a sprocket. http://www.gearseds.com/files/design_dr ... cket_5.pdf
I was hoping the web could be a resource for confirming my measurements but rather it seems more like a circular argument citing other incorrect references.... No shit the idea of a flat earth became a thing despite evidence supporting the contrary as far as 2000 years back...
Anyone have any evidence based and supporting measurements?