Aldot, your measurements will be appreciated whenever you have time to make them.
With regards to the pic posted by Grumpy, it appears to be the same as the unit I have in my shop. 5/16 drive sprocket and chain, running to a 3/16 axle sprocket, so at least I'm not dealing with anything unique.
I agree about the added load capacity of 5/16 chain and primary sprocket and how this may have been a cheaper or more easily available solution, but chains are sneaky, devious little buggers that delight in going their own way, with the slightest provocation and usually when it proves to be most inconvenient. If you look at a rating curve for a chain, it's load capacity just about falls off a cliff as soon as you have any torsion (twist). Running a wide chain on a narrow sprocket (in this case 40% narrower) and running it in a hostile environment, is a good recipe for torsion.
Perhaps I can also tackle this from another angle....
The IPL for this machine gives the following part numbers:
Primary Sprocket : #252
Drive Chain: GT500
Can anyone tell me the specs for the original sprocket or chain?
Last edited by Tentimes; 08/03/13 03:34 AM.
