Hi Darren
Bainbridge made saws a lot like a 4x6.? I'm guessing a model 712 is a 7"x12".? If it is similar to their smaller ones, the same things that fix 4x6's will fix it.??
Please post a photo of yours so we can see. Will make it easier to give you advice.??
There's pics of a model 304 and a real old one in the File section of this site: (file:///C:/Users/vreed/Downloads/_Bainbridge%20band%20saw%20images%20Model%20_%20&%20Model%20304.pdf)
They had washers for blade guides, not like anything modern which use ball bearings, but otherwise the way it works is the same.
I'm sure we can help if you post a photo - jv
