thank you for the pictures and feedback on the tapped holes. Good advice on the sprockets - I'll see if I can find pre-tapped sprockets. Right now that was the lowest cost option that I was able to find but I will keep looking. thanks again.
@paul the sprockets are low cost blanks, its possible to broach them but I just removed the keys from the motor shafts and drilled and tapped the sprockets for set screws.
thank you for the pictures and feedback on the tapped holes. Good advice on the sprockets - I'll see if I can find pre-tapped sprockets. Right now that was the lowest cost option that I was able to find but I will keep looking. thanks again.