Reconditioning a Relmac lathe

[irving2008]

Only a suggestion, a ghastly, unauthentic bodge that may cause you to vomit, but here goes :rofl:

Turn and bore the bearings to size.

File the externals so they can fit perfectly in line

Jig up square and all assembled

Inject Loctite (or metal loaded epoxy if slack), in to wherever you poured the molten metal before

Robin

What you need is a portable boring machine that'll go down to your spindle size (Unfortunately my ancient Buma bar is 2" minimum)
...

Robin, I had considered the idea of boring oversize, then fitting bronze bushes which have been lined with white metal and bored to size. But the effort of this outweighs the idea of boring to size since these bearings if done right, will last another 100 years or so.

Bill - interesting but don't see how to get it parallel to ways... these boring machine assume a cylinder block or similar to sit on that is a known perpendicular to the hole to be bored.

My current plan is to make a saddle out of 1/2" ground plate, approx 8" long which will be bolted to the apron in place of the real saddle and will carrry two braced uprights with oilite bearings in which will run the spare spindle from my breaker lathe and this will be driven by a small, 1/4HP AC motor via two pulleys and a v-belt that I have lying around. This needs a cutter rotating at 400 - 500rpm so gear down 3:1 (1450 -> ~500RPM). I will use my existing MT3 boring bar and draw bar The back end of the saddle will have a gib plate cut at 60deg to match the existing dovetail. I'll fit a handle to the leadscrew at the headstock end in place of the gearwheel to allow the boring assembly to be wound into the headstock...