Discussion:
WTB: EMCO Compact 5 PC parts
(too old to reply)
Danny Lester
2003-10-10 17:42:54 UTC
Permalink
Help! I need a tool post holder, tailstock, inside chuck jaws for a compact 5. Has anyone made a drawing of the tool holders? I could make if I had a print to go by.
Thanks
Danny
DoN. Nichols
2003-10-11 04:02:00 UTC
Permalink
In article <bm6r43$901$***@news.chatlink.com>,
Danny Lester <***@1dialup.net> wrote:

[ ... ]
Help! I need a tool post holder, tailstock, inside chuck jaws for a =
compact 5. Has anyone made a drawing of the tool holders? I could make =
if I had a print to go by.
The 'PC' in your subject line, but not in the description in the
body, suggests that this is the later CNC version -- the one which uses
a PC as the controller, instead of having it built in, as in my
Compact-5/CNC.

The toolpost and holders which came with mine (and which have
been augmented by some from eBay auctions) happen to be identical to
some sold for Myfords, IIRC. There actually were two styles,
sufficiently different so none of the parts were interchangeable.

The one which I have has a T-slot centrally located between two
female 'V's (on the tool holder), and the T-slot is engaged by a
cam-operated T-head on the toolpost. This is the style which I have
seen offered for Myfords. I think that the maker in England is
"Dickson" or "Dickenson", but I could be wrong.

The other style is similar, but the T-slot is not centrally
located, but rather offset towards one of the 'V's, and the matching
T-nut is pulled in by a screw which passes through the body of the
toolpost, and is operated by a wrench on the heads of the bolts. (Both
of these toolposts have two positions in which the tool holders can be
mounted -- one proper for turning the OD of a workpiece, and the other
proper for boring and facing.

In either case, the center-to-center spacing of the two 'V's is
critical, if you are making holders to fit an existing toolpost.

You can also get tailstocks and other accessories from eBay
vendors from time to time -- just watch it for a while.

Note that the toolpost described is *only* for the CNC version
without a compound. I've never seen a manual version (just photos), and
am not sure how different the toolpost and holder may be for that
version.

By "inside chuck jaws", do you mean the ones which are most
commonly fitted to the chuck, which can grip the ID of tubing by
expanding outward, or grip normal round stock? Or do you mean the
reversed ones, which grip larger stock on the jaw steps?

Come to think of it -- there are two styles of 3-jaw chucks for
the Compact-5.

One is like the chucks found on larger machines, with two sets
of jaws (inside and outside), plus possibly a set of soft jaws which can
be bored for specialized workholding.

The other style, which is what came with my machine, uses a key
akin to that for a Jacobs drill chuck, with the gearing engaging a set
of gear teeth on the OD back of the scroll plate, exposed to the outside
of the chuck. This style happens to have reversible jaws. Crank them
all the way out, and look at the teeth in the backs of the jaws to
enaged the scroll plate. In normal chuck jaws, they look like this
from the bottom:

[ (( (( (( (( (( >

while in this style of chuck, they look like this:

[ () () () () () >

allowing the scroll plate to drive them either way around. Note that the
jaws have to be inserted in reverse order (3, 2, 1) when reversed to
center well.

I have never seen just the jaws on eBay (and if I did, I would
snatch up a set for my second (and more worn chuck) of the first style).

But I *have* seen auctions for the entire chuck of the first
style, with two sets of jaws (normal and reverse) *plus* a set of unused
soft jaws. The first of these auctions, I bid on and won the complete
chuck. I have since seen a couple of others brought to auction. Note
that these are *not* cheap. :-(

I have also seen a set of soft jaws sold separately. You could
get such a set, and bore them to make the reverse jaws you are looking
for -- even though they are not hardened, they could serve well.

Finally -- could you *please* turn off the HTML in your
postings? I have modified the HTML from your posting below so it will
not be recognized as HTML by your newsreader, and so you will see what
the rest of us (who prefer to use non-HTML-capable newsreaders for the
greater security the offer) see every time you post.

My changes were:

1) Replace every '>' with '}' (except those added by the quoting
process.

2) Replace every '<' with '{'

3) Replace every '&' with '~', so that simple spaces are not turned
into "& nbsp ;" (without the spaces), causing a single
character to occupy six spaces.

HTML is good -- in web pages where it belongs. Usenet news was
*not* designed to use HTML, and as a result it wastes space, and looks
ugly.

Thank you,
DoN.

================= Modified HTML below ================================
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{DIV}{FONT size=3D2}Help! I need~nbsp; a tool post holder, tailstock, =
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holders?~nbsp;=20
I could make if I had a print to go by.{/FONT}{/DIV}
{DIV}{FONT size=3D2}Thanks {/FONT}{/DIV}
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--
Email: <***@d-and-d.com> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
Danny Lester
2003-10-11 11:57:16 UTC
Permalink
Post by DoN. Nichols
[ ... ]
Help! I need a tool post holder, tailstock, inside chuck jaws for a =
compact 5. Has anyone made a drawing of the tool holders? I could make =
if I had a print to go by.
The 'PC' in your subject line, but not in the description in the
body, suggests that this is the later CNC version -- the one which uses
a PC as the controller, instead of having it built in, as in my
Compact-5/CNC.
Yes this is the later version of the Compact-5 CNC. It will import DXF
files directly, also can program the nc file from Mastercam just like my
large cnc machines.
Post by DoN. Nichols
The toolpost and holders which came with mine (and which have
been augmented by some from eBay auctions) happen to be identical to
some sold for Myfords, IIRC. There actually were two styles,
sufficiently different so none of the parts were interchangeable.
The other style is similar, but the T-slot is not centrally
located, but rather offset towards one of the 'V's, and the matching
T-nut is pulled in by a screw which passes through the body of the
toolpost, and is operated by a wrench on the heads of the bolts. (Both
of these toolposts have two positions in which the tool holders can be
mounted -- one proper for turning the OD of a workpiece, and the other
proper for boring and facing.
In either case, the center-to-center spacing of the two 'V's is
critical, if you are making holders to fit an existing toolpost.
The t-nut off-center is the style mine has. I would have no problem making
them with my CNC wire edm if I had a print. Emco no longer sells them.
Post by DoN. Nichols
Note that the toolpost described is *only* for the CNC version
without a compound. I've never seen a manual version (just photos), and
am not sure how different the toolpost and holder may be for that
version.
By "inside chuck jaws", do you mean the ones which are most
commonly fitted to the chuck, which can grip the ID of tubing by
expanding outward, or grip normal round stock? Or do you mean the
reversed ones, which grip larger stock on the jaw steps?
Yes this is the ones, mine has the outside jaws for gripping larger stock
but they don't give much support when gripping smaller pieces, also the
other stepped segemts don't allow me to get closer to chuck. This Emco
chuck is like larger chucks on my other lathes. Emco still stocks the jaws
at around $140.00 a pop!

Thanks for your reply
Danny
Post by DoN. Nichols
Come to think of it -- there are two styles of 3-jaw chucks for
the Compact-5.
One is like the chucks found on larger machines, with two sets
of jaws (inside and outside), plus possibly a set of soft jaws which can
be bored for specialized workholding.
The other style, which is what came with my machine, uses a key
akin to that for a Jacobs drill chuck, with the gearing engaging a set
of gear teeth on the OD back of the scroll plate, exposed to the outside
of the chuck. This style happens to have reversible jaws. Crank them
all the way out, and look at the teeth in the backs of the jaws to
enaged the scroll plate. In normal chuck jaws, they look like this
[ (( (( (( (( (( >
[ () () () () () >
allowing the scroll plate to drive them either way around. Note that the
jaws have to be inserted in reverse order (3, 2, 1) when reversed to
center well.
DoN. Nichols
2003-10-11 18:24:26 UTC
Permalink
[ ... ]
Post by Danny Lester
Yes this is the later version of the Compact-5 CNC. It will import DXF
files directly, also can program the nc file from Mastercam just like my
large cnc machines.
O.K. Certainly an advantage over my Compact-5/CNC, which I
normally program by hand.

[ ... ]
Post by Danny Lester
Post by DoN. Nichols
The other style is similar, but the T-slot is not centrally
located, but rather offset towards one of the 'V's, and the matching
T-nut is pulled in by a screw which passes through the body of the
[ ... ]
Post by Danny Lester
Post by DoN. Nichols
In either case, the center-to-center spacing of the two 'V's is
critical, if you are making holders to fit an existing toolpost.
The t-nut off-center is the style mine has. I would have no problem making
them with my CNC wire edm if I had a print. Emco no longer sells them.
O.K. The CNC wire edm would certainly hold the precision
needed, though I suspect that they were made with a horizontal mill,
with the spacing between the two 'V' set by spacers, and the center
groove of the 'T'-slot cut at the same pass.

Unfortunately, I don't have any of this style -- just the
sketches in the shop manual, which are dimension-free.

[ ... ]
Post by Danny Lester
Post by DoN. Nichols
By "inside chuck jaws", do you mean the ones which are most
commonly fitted to the chuck, which can grip the ID of tubing by
expanding outward, or grip normal round stock? Or do you mean the
reversed ones, which grip larger stock on the jaw steps?
Yes this is the ones, mine has the outside jaws for gripping larger stock
but they don't give much support when gripping smaller pieces, also the
other stepped segemts don't allow me to get closer to chuck.
So -- you have the exact opposite of what I have, then. Maybe
your best bet is a set of the soft jaws, which you could turn to the
needed profile. Keep watching eBay with a search for Compact-5.
Post by Danny Lester
This Emco
chuck is like larger chucks on my other lathes. Emco still stocks the jaws
at around $140.00 a pop!
They are very nice chucks. You should try the price of the
4-jaw universal chuck -- which I got thinking that I was ordering the
independent 4-jaw. :-)
Post by Danny Lester
Thanks for your reply
And thank *you* for turning off the HTML.

Hopefully, someone else here has an example of the offset
T-slot style, and can give you measurements. Of course, most of the
dimensions are not really critical -- just the placement of the 'V's,
and the T-slot dimensions.

If all else failed, you could design your own and make the
dimensions whatever is convenient for you.

Best of luck,
DoN.
--
Email: <***@d-and-d.com> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
JAMES RISER
2003-10-11 17:55:53 UTC
Permalink
Danny;
My last post may not have been sent. I do not have time to measure and
draw; but photos may help you. Check out:
http://jamesriser.com/EMCO_Compact_5/PC.html
Jim
http://www.jamesriser.com/CD_Preview/Intro.html
--
James P. Riser
Http://www.JamesRiser.com
"Danny Lester" <***@1dialup.net> wrote in message news:bm6r43$901$***@news.chatlink.com...
Help! I need a tool post holder, tailstock, inside chuck jaws for a compact
5. Has anyone made a drawing of the tool holders? I could make if I had a
print to go by.
Thanks
Danny
JAMES RISER
2003-10-11 17:59:28 UTC
Permalink
Danny;
I do not have time to measure and make drawings; but photos may help you.
Se at:
http://www.jamesriser.com/CD_Preview/Intro.html
Jim
http://www.jamesriser.com/CD_Preview/Intro.html
--
James P. Riser
Http://www.JamesRiser.com
Danny Lester
2003-10-19 13:02:35 UTC
Permalink
Thank You. I found one to borrow at the local college shop. I have now
made a print on Cadkey and burnt several on my Wire EDM. One good thing is
now I can made any configuration I want. I have made holders to work on
both sides of toolpost also to hold regular boring bars.
Danny
Post by JAMES RISER
Danny;
I do not have time to measure and make drawings; but photos may help you.
http://www.jamesriser.com/CD_Preview/Intro.html
Jim
http://www.jamesriser.com/CD_Preview/Intro.html
--
James P. Riser
Http://www.JamesRiser.com
JAMES RISER
2003-10-11 18:01:01 UTC
Permalink
Danny;
Try:
http://jamesriser.com/EMCO_Compact_5/PC.html
Jim
--
James P. Riser
Http://www.JamesRiser.com
"Danny Lester" <***@1dialup.net> wrote in message news:bm6r43$901$***@news.chatlink.com...
Help! I need a tool post holder, tailstock, inside chuck jaws for a compact
5. Has anyone made a drawing of the tool holders? I could make if I had a
print to go by.
Thanks
Danny
JAMES RISER
2003-10-11 19:33:53 UTC
Permalink
Sorry for the multiple posts. My news reader is acting up.
Jim
--
James P. Riser
Http://www.JamesRiser.com
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