I have my high-speed spindle, a drill quill made to run 10k rpm.
However, it has a M-1 male taper that holds a 1/4" Jacobs chuck. I need
to mount a 6" x 1/16" x 7/8" AH cut-off disk. Is there a commercial
adapter or do I have to make something?

Morse tapers are great for drills, but an uneven load will work them loose
if the quill doesn't have provisions for a drawbar to insure the taper stays
locked in place.

A 3" radius cutting tool will be a significant side load depending upon how
it approaches the work.. especially for a #1 MT.

There might be a stub arbor in #1 MT that's as big as 7/8", but probably not
very common.. 7/8" would more likely be found on a #2 or 3 MT, maybe.
The #1 MT is for small accessories/tooling such as the small chuck you have.

--
WB
..........


"Tom Gardner" mars@tacks wrote in message
...
I have my high-speed spindle, a drill quill made to run 10k rpm. However,
it has a M-1 male taper that holds a 1/4" Jacobs chuck. I need to mount a
6" x 1/16" x 7/8" AH cut-off disk. Is there a commercial adapter or do I
have to make something?

"Tom Gardner" mars@tacks wrote in message
...
I have my high-speed spindle, a drill quill made to run 10k rpm. However,
it has a M-1 male taper that holds a 1/4" Jacobs chuck. I need to mount a
6" x 1/16" x 7/8" AH cut-off disk. Is there a commercial adapter or do I
have to make something?

I read that as a male Morse #1 taper protruding from the end, fitting a
female taper hole in a Jacobs chuck. Usually the male stub arbor would have
a Jacobs taper. The large ends of likely candidates are 0.384" for Jacobs
#1, 0.475" for Morse #1, and 0.559" or .549" for Jacobs #2.
http://www.newmantools.com/tech/taper.htm

The inner bodies of Jacobs chucks are soft and easily machined, even the
high quality ball-bearing Supreme ones. I just checked with a file. If your
arbor is soft enough to drill and tap the end for a retaining screw you
could modify a chuck body into the disk holder.

jsw

"Wild_Bill" wrote in message
...
Morse tapers are great for drills, but an uneven load will work them loose
if the quill doesn't have provisions for a drawbar to insure the taper
stays locked in place.

A 3" radius cutting tool will be a significant side load depending upon
how it approaches the work.. especially for a #1 MT.

There might be a stub arbor in #1 MT that's as big as 7/8", but probably
not very common.. 7/8" would more likely be found on a #2 or 3 MT, maybe.
The #1 MT is for small accessories/tooling such as the small chuck you
have.

--
WB
.........


I probably could sneak a screw into the tip of the arbor to hold an adapter
in place. I can bush the disk down like the current setup to 1/2". I did
check with the manufacturer about the radial load and this application and
he said "no problem". That tapered arbor just looks so tiny! But, if I
figure it all out I'll have a cheap, quiet trimmer! One of the engineers
has already drawn up a preliminary design to machine the piece but I hate
high-speed stuff, it's just not forgiving in the slightest.

"Jim Wilkins" wrote in message
...

"Tom Gardner" mars@tacks wrote in message
...
I have my high-speed spindle, a drill quill made to run 10k rpm.
However, it has a M-1 male taper that holds a 1/4" Jacobs chuck. I need
to mount a 6" x 1/16" x 7/8" AH cut-off disk. Is there a commercial
adapter or do I have to make something?

I read that as a male Morse #1 taper protruding from the end, fitting a
female taper hole in a Jacobs chuck. Usually the male stub arbor would
have a Jacobs taper. The large ends of likely candidates are 0.384" for
Jacobs #1, 0.475" for Morse #1, and 0.559" or .549" for Jacobs #2.
http://www.newmantools.com/tech/taper.htm

The inner bodies of Jacobs chucks are soft and easily machined, even the
high quality ball-bearing Supreme ones. I just checked with a file. If
your arbor is soft enough to drill and tap the end for a retaining screw
you could modify a chuck body into the disk holder.

jsw


That's a great suggestion, thanks! I'll post the final solution when it's
running.

Tom - you might check the Enco or MSC (mcs?) catalog for morse taper
adapters. Some of the morse to jacobs converters present a large
head (jacobs) and a small tail (morse). If the tail fits into a lathe,
the head can be turned to purpose.

Hul

Tom Gardner wrote:

"Jim Wilkins" wrote in message
...

"Tom Gardner" mars@tacks wrote in message
...
I have my high-speed spindle, a drill quill made to run 10k rpm.
However, it has a M-1 male taper that holds a 1/4" Jacobs chuck. I need
to mount a 6" x 1/16" x 7/8" AH cut-off disk. Is there a commercial
adapter or do I have to make something?

I read that as a male Morse #1 taper protruding from the end, fitting a
female taper hole in a Jacobs chuck. Usually the male stub arbor would
have a Jacobs taper. The large ends of likely candidates are 0.384" for
Jacobs #1, 0.475" for Morse #1, and 0.559" or .549" for Jacobs #2.
http://www.newmantools.com/tech/taper.htm

The inner bodies of Jacobs chucks are soft and easily machined, even the
high quality ball-bearing Supreme ones. I just checked with a file. If
your arbor is soft enough to drill and tap the end for a retaining screw
you could modify a chuck body into the disk holder.

jsw


That's a great suggestion, thanks! I'll post the final solution when it's
running.

I found these machinable blank end Morse arbors, MT 1 with a 7/8"dia.
x1-1/8" blank area which can be useful for making tooling/adapters etc.

--
WB
..........


"Tom Gardner" mars@tacks wrote in message
...
I have my high-speed spindle, a drill quill made to run 10k rpm. However,
it has a M-1 male taper that holds a 1/4" Jacobs chuck. I need to mount a
6" x 1/16" x 7/8" AH cut-off disk. Is there a commercial adapter or do I
have to make something?

Wow, that was a worthless post.. but who hasn't seen ****loads of them in
recent years?

The link to Victor

http://victornet.com/report/Arbors-M...-End/1370.html

Victor Machinery
"Morse Taper to Blank Arbors.
Hardened Morse Taper with a soft, machineable "blank" end.
Can be used to create arbors with special tapers, threading, etc."

--
WB
..........


"Wild_Bill" wrote in message
...
I found these machinable blank end Morse arbors, MT 1 with a 7/8"dia.
x1-1/8" blank area which can be useful for making tooling/adapters etc.

--
WB
.........