Originally Posted by RAJBCPA
did you check the indexing pawls; they break often when a jam occurs? i was told by hornady customer service that the breaking pawls are designed to prevent broken hubs.
...so one part is designed to break so another part doesn't break????
That is only one reason I bagged this press after +20 calls to customer service. My Dillon 550b has been great.
Yup...that is a very common engineering design practice.
It comes in handy to design one shear item into a mechanism. In this case, preferably a simple part like a flat pawl instead of a complexly machined drive hub.
On some other machine, it might be a shear pin or bolt. Usually something easy and inexpensive to replace.
Don't smile too much about your Dillon...I'd bet money that it has a shear system designed into it as well.
I wonder if the Hornady press always used a cast part for that hub. A machined billet hub would be stronger. Could've been a flaw in the metal right at the base of the key too.
I would drill and pin that part and keep it on hand for a spare.