[Madison]

Originally Posted by billbo911

A picture paints a thousand words.

I hate to tell you this, but I just don't see any way the screw that holds the extension in place being able to handle the torque that will be applied to it. In effect, that screw will be all that is driving the outboard sprocket and it's applied load.
Now, if the extension was to have a section that fit over the shaft protruding past the first sprocket with a key way slot to drive it, no shoulder on the outboard side so the outer sprocket could then be mounted to it, and finally the center drilled through so that a screw passed through a washer , through the extension and into the trans output shaft to hold it all together, then that "might" work. Clear as mud??

I understand that the screw alone would shear under the load exerted by the chain onto the outermost sprocket. I was hoping that, by bolting the sprockets together, those bolts would transmit some of that load onto the main shaft. I understand the solution you propose as well, though I don't believe we're capable of broaching a keyway and thus, it's a bit harder to implement.

I may just opt for a different chain routing so as to completely eliminate the outermost sprocket.