NDDan
Guest
Bolts were very likely a little loose. If you have any stubs of bolts you will likely see they were wearing. If you check the broken stubs you will likely see they very in length. Get some fresh grade 8 bolts but be sure they are the right length so they don't bottom out before they compress the parts together. Several things put stress on feeding system but rarely will bolts ever shear unless loose. Hopefully you have been following posts on feeding so you have an idea how to improve which ever machine you have. Good luck