In article ,
Dan Allen wrote:
Peter T. Keillor III wrote in message . ..
On 1 Dec 2003 10:48:56 -0800, (Dan Allen) wrote:
I have a Delta-Rockwell 11" (#25-100) lathe and I'm looking for a
source for adapter sleeves for the L-00 spindle, which I believe has a
#4-1/2MT center hole.
That is the case with the Clausing that I have, but there is no
certainty that other makers (e.g. Rockwell/Delta) use the same internal
taper on an L-00 spindle nose.
I'd like sleeves for #3MT and 5C collets as well
as a spindle nose protector. Anybody have any experience/advice
regrinding a #5MT to #4-1/2?
Nope -- I've turned a couple of adaptors from plain mild steel
from MT4-1/2 male to MT2 and MT3 female. I made the MT 4-1/2 part
first, and then made the female taper with the male part in my spindle.
[ ... ]
Yes, don't. According to Royal, the taper is actually a short 5MT.
Put prussian blue on your 5MT and check. I got a 5C adapter from
Good advice -- if you have a MT-5 already.
[ ... ]
WRT using a MT5/MT3 adapter sleeve, how short is "short"? According to
the specs on the Morse site the tapers are real close(MT5=.052626/in,
MT4.5=.052000/in) but the OD's barely overlap (MT5=1.74800/1.47500,
MT4.5=1.50000/1.26600). An MT5 sleeve is only going to fit 1/2" deep
in an MT4.5 socket if I did the math right. To get anywhere close to
the 4.625" socket depth of the MT4.5 you still need to reduce the MT5
OD by nearly .25". I don't see how a MT5/MT3 sleeve could be made
usable without regrinding the taper.
If it is a short MT-5, it will be using the large end, not the
small end. The advice of using bluing will allow you to find out what
part of the MT-5 is actually being used.
If you discover that it is indeed only using the small end, then
it probably *is* a MT 4-1/2, and I would suggest buying one from
Clausing, if you don't have a taper turning attachment and the ability
to set it to match the internal taper of your lathe spindle, (Hint --
use an indicator on the back side of the taper, and set the taper
attachment to produce no change in reading as it is cranked in and out.
Good Luck,
DoN.
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