On 2 Dec 2003 06:36:08 -0800, (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. 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?

TIA,

Dan

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
Royal that works well for mine (same model). The part number is
R184024. I made my own spindle nose protector and drawbar. See
http://www.metalworking.com/DropBox/...oj-5CParts.JPG

and others in that series. My homemade adapter sleeve sucked, and was
replaced by the Royal unit. The rest is in service.

Pete Keillor

Thanks Pete! That Royal number matches the one on a closer that's
part of a complete lever unit currently offered on E-bay. I'll give
them a call for pricing. I'd already about decided to fab the nose
protector - there was one on E-bay (Clausing NOS) over Thanksgiving
but I lost the auction 8-(

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.

Dan

05
Pretty short. The front diameter was 1.575", with total taper length
of 2" according to the Royal tech IIRC. The problem with the MT5/MT3
adapter will be that the MT3 taper is probably in the larger diameter
section of the adapter. If you cut it off to fit, most of the MT3
will be gone. I suggested using prussian blue on your MT5 to verify
the taper. I know the Royal part fits, but only have their word on
the taper.

To make a center for the headstock, I just turned one to fit using the
compound. It looks like a stubby end of a 5MT taper with a 1"
diameter center section sticking out. I used a 1" 5C collet to hold
the workpiece after turning the center 1" dia. portion, then turned
the tapered part and used prussian blue to check the fit and adjust
the taper. Two tries and I had uniform contact on the tapered
portion. It's certainly not as nice as a hardened and ground one, but
I can just true up the center after installing it each time. The
center part of it is still too long (at least for the lathe dogs I
have), but I'll cut it down when I want to turn something between
centers. Or, I may make a clamp style dog to match.

Good luck.

Pete