Quote:
Originally Posted by john hall
I've adjusted a few babbit crank bearings and will be honest, I never bothered to mike the shaft, just measure and remove shims until things got tight then added some back. Do you know if this was something more popular with auto engines than tractor and stationary engines? I'm thinking the "farm stuff" was ran slower and maybe more forgiving. I guess real repair shops may have been the ones using them, as crank grinding machines were few and far between. Certainly a cool item! I work with a guy who's father just retired as an engine machinist. Next time I see him I'll ask if he ever heard of one of these.
|
The patent date is April 4, 1922 on this cutter. Almost all the engines used babbitt back then. High rpm wasn't used since babbitt can give up quickly under heavy load. ( keep in mind that when you double the rpm, the centrifical force quadruples. )