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(DoN. Nichols) wrote in
:

In article ,
Grant Erwin wrote:
Martin Whybrow wrote:
Maybe someone might reply if I'm less specific in my subject line
:-)

I'm rebuilding a Myford ML4 (3.75" centre height) lathe at present.
When I bought the lathe I found, too late, that the headstock
spindle and bearings

[ ... ]

If you're not familiar with this lathe, the bearings are plain
bronze split bearings mounted in a split headstock bearing housing
(not removable bearing caps).
Martin.

This might be a good application for an adjustable reamer. - GWE

Except that the flutes tend to catch on the split -- unless you
can find an adjustable reamer with a steep spiral on the flutes.

I think that it would need to be fitted with a pilot which uses
the other bearing as an alignment aid, too. Two pilots -- one turned
to fit the un-reamed other bearing, and then one turned to use the
just reamed one as a reference while reaming the other bearing.
Something like the reamer setups for camshaft bearings in automotive
engines.

An alternative way to do would be with a bearing scraper and
spotting blue.

Good Luck,
DoN.

Why not just take the .003 off the spindle OD ? Seems it would be easier
than trying to line bore the headstock.

--
Anthony

You can't 'idiot proof' anything....every time you try, they just make
better idiots.

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