First, do a "Bridgeport spindle" or "spindle bearing" or "spindle repair" on this website via the search engine. You should be able to find a detailed explanation as to why it is not a simple "remove and replace" repair to install bearings into a Bridgeport spindle.
If you can provide an OEM part number for the spindle bearings that were used in your spindle, I should be able to provide the part numbers for aftermarket bearings that can be installed or adapted for installation into your spindle. THESE RECOMMENDATIONS WOULD BE BASED UPON THE SPECS FROM EXACT OEM BEARING DRAWINGS THAT I ACQUIRED OVER THE COURSE OF MY CAREER.
HOWEVER, if you have one of the odd sized spindles that Bridgeport is known to have supplied over the years, you're going to need to either grind the spindle shaft and/or housing to a nominal "standard" size or perhaps flash chrome plate the shaft/housing if the units are some of the undersized offerings that BPT supplied.
When you know what you have, you can then decide what to do. But first, find the prior post where the vagaries of Bridgeport spindles were discussed.
BTW, there are some former factory guys out there who still service BPT spindles. These were the same guys who built them using the selective fit methods that were used. One such guy who does the work or knows who can do a factory quality rebuilds (outsided of Hardinge) is Brian at BPT Machines in Carrol Steam Illinois (360-781-9942).
Don't bother to call for DIY instructions - he sells his services at a fair price and he's the ONLY guy I let touch my machines - and he's several states over from me!!!!.  |