"Scott S. Logan" wrote in message
news
On Sun, 24 Aug 2003 10:56:22 -0400, Jack Erbes
wrote:


I think it is the infamous No. 4-1/2 Morse taper. That was used to
get a taper that did not have excess length hanging out the front of
spindles with a nominal 1-3/8" I.D. Those are the spindles that are
large enough to accept a 5C collet body.

Many lathes (South Bend, Logan, Sheldon, Clausing, etc.) with 1-3/8"
I.D. spindles came with a hardened and ground MT 4-1/2 to MT 3 or MT 2
adapter so that commonly used MT 2 and 3 cutters and tooling MT could
be used in either the headstock or tailstock.

Sorry, wrong on at least two counts.

Neither Logan nor South Bend used a Morse Taper on their lathes with
1-3/8" spindle bore.

Logan and South Bend both used proprietary tapers, the Logan
0.070"/inch for most 11" and all 12" and 14" Lathes.

South Bend used (mostly) 0.602"/foot taper.

I can't say what was used on Sheldon or Clausing.

Can't speak to other Clausing models but the Clausing 5900 series lathes
have 4-1/2 MT tapers inside the spindles.


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