DIYbanter - View Single Post - Bridgeport tooling - MT3 v R-8

In article . com,
says...
I wouldn't try taking a BP spindle apart. The bearings are pre loaded
and possibly need special tools to dismantle and reassemble.

The J-head spindles are quite straightforward to work on. Preload is
predetermined by the bearing set. The proper hook spanner and pin
spanner are nice to have, but by no means necessary.

I understand that the M-heads are another matter entirely.

Ned Simmons