[F500] sprockets?

[BlueRace44 at aol.com]

Bill - Regarding the machining of the primary gear when you start looking for 
your gears - The size chain you are matching is #50 Industrial roller chain.  
The pitch (5/8") of the #50 chain is the same as the 520 'o-ring' chain 
mentioned by others.  I chose to use 530 'o-ring' chain.  This is also a 5/8" pitch 
and is the same width as the #50 industrial.  If you order your driven 
sprocket from Sprocket Specialties they can cut the width for either 520 or 530.  As 
I said I use the 530 on a full width size 50 drive gear but I run my driven 
sprocket at the 520 width.  This does allow for very minimal misalignment but 
mostly I do it as a help to keep debris out of the sprocket.  Motion Industries 
is where I buy my Martin sprockets.