almost finished - some cleanup and maybe some paint still needed, plus add
the MT3 to fit in the tailstock quill

http://metalworking.com/dropbox/floa...ool_holder.jpg
http://metalworking.com/dropbox/floa...ool-holder.txt

something I learned that I didn't expect - in broaching the keyway I used
three bushings to get support over the full 6 inch length of the cylinder -
the keyway ended up slightly curved (very slightly) - just enough that the
tool holder wouldn't slide freely until I worked on the keway and also filed
maybe 1/2 thousandth off of the leading edge of one side of the woodruff key
and the trailing edge of the other - with a #C Dumont tool, who would have
thought this was possible - not me....


by the way, the floating holder is really really nice - I bought two extras,
if anyone else wants to do this contact me via the email address on my web
page
--
Bill
www.wbnoble.com

Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt


Doesn't your keyboard have a CR (carriage return) on it?
...Lew...

On Mon, 24 May 2010 09:35:18 -0600, Lewis Hartswick
wrote:

Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt


Doesn't your keyboard have a CR (carriage return) on it?
...Lew...

Bill probably used word wrap, which has led me astray in the same
manner.

Pete Keillor

??? what is the problem???

"Lewis Hartswick" wrote in message
m...
Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt


Doesn't your keyboard have a CR (carriage return) on it?
...Lew...

Bill Noble wrote:
??? what is the problem???

"Lewis Hartswick" wrote in message
m...
Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt


Doesn't your keyboard have a CR (carriage return) on it?
...Lew...

The entire text was ONE line about a mile long and
required horizontal scanning to read it.
...Lew...

On May 25, 10:16*am, Lewis Hartswick wrote:
Bill Noble wrote:
??? *what is the problem???

"Lewis Hartswick" wrote in message
om...
Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt

Doesn't your keyboard have a CR (carriage return) on it?
* *...Lew...

The entire text was ONE line about a mile long and
required horizontal scanning to read it.
* * ...Lew...

Also, I think it truncates after 256 characters...?

It's the basic problem of displaying a text file in a browser.
Reformatting with a hard enter at about the 70 to 80 character mark
(or 6-1/2 to 7" mark, if that's what your ruler displays) in something
that does not try to take over all the formatting for you, like
notepad, will usually fix it...

--Glenn Lyford

Lewis Hartswick wrote:

Bill Noble wrote:
??? what is the problem???

"Lewis Hartswick" wrote in message
m...
Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt


Doesn't your keyboard have a CR (carriage return) on it?
...Lew...

The entire text was ONE line about a mile long and
required horizontal scanning to read it.


Not here. It looked OK. What do you have your line length set to?

--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

"Lewis Hartswick" wrote in message
...
Bill Noble wrote:
??? what is the problem???

"Lewis Hartswick" wrote in message
m...
Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt


Doesn't your keyboard have a CR (carriage return) on it?
...Lew...

The entire text was ONE line about a mile long and
required horizontal scanning to read it.
...Lew...

ok - understood - I guess I quit using the ED editor under VMS a long time
ago and I'd forgotten about that - I set my news reader to wrap lines -
perhaps yours has a similar feature?

escaping from the whining about the specific method of posting, I've painted
the thing, next step is to finish the taper and try it out - actually I'm
kind of amused that no one remarked on either "horrible machine work, you
are an idiot" or 'beautiful work, you are a genius" - just complained about
a post lacking 0D 0A byte sequences (for those who don't live by the
computer those are the hex values for the ASCII symbols for carriage return
and line feed.

On Tue, 25 May 2010 11:39:05 -0700, Larry Jaques wrote:
On Tue, 25 May 2010 08:16:39 -0600, Lewis Hartswick wrote:
Bill Noble wrote:
??? what is the problem???

"Lewis Hartswick" ... wrote ...
Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt

Doesn't your keyboard have a CR (carriage return) on it?

The entire text was ONE line about a mile long and required horizontal
scanning to read it.

So turn on Word Wrap in your newsreaders, silly persons. NEE!

How will turning on word wrap in the newsreader make the words
wrap in the browser? When you clicked on that link
http://metalworking.com/dropbox/floating_tool-holder.txt
did you see a long line of text, requiring horizontal scrolling
to read, or were the words wrapped?

Firefox has no word wrap option (as delivered) but with Chrome
you can turn it on (per wordpress.com link below). The
Readability addon http://lab.arc90.com/experiments/readability/
wraps it (not very neatly) and Firefox view-source probably can,
http://kb.mozillazine.org/View_source.wrap_long_lines.

http://ttcs.wordpress.com/2008/02/12/how-to-apply-word-wrap-to-text-files-viewed-in-mozilla-firefox/)

--
jiw

On 2010-05-26, Bill Noble wrote:


"Lewis Hartswick" wrote in message
...
Bill Noble wrote:
??? what is the problem???

"Lewis Hartswick" wrote in message
m...
Bill Noble wrote:
http://metalworking.com/dropbox/floa...ool-holder.txt


Doesn't your keyboard have a CR (carriage return) on it?
...Lew...

The entire text was ONE line about a mile long and
required horizontal scanning to read it.
...Lew...

ok - understood - I guess I quit using the ED editor under VMS a long time
ago and I'd forgotten about that - I set my news reader to wrap lines -
perhaps yours has a similar feature?

He was complaining about the line in the ".txt" file you sent to
the dropbox, not what appears in your postings. If you view it in a
browser, you have to scroll it to read the whole line (or live with it
shrinking the font size to a nearly-invisible row of dots depending on
options selected in your browser). If you download it, you can perhaps
load it into an editor which automatically folds lines for you --
depending on the choices available on your particular computer.

Your lines in the news articles are properly folded -- though
some others post them not folded.

And in that case, with my choice of newsreader and editor, the
*newsreader* will fold the lines properly for display, but if I opt to
follow up, the editor will simply display the first N characters
(typically 80, depending on the window size) and mark the right margin
with a '!' indicating that there is something beyond that.

And -- if the line is over 1024 characters long, it will
truncate that line there, and discard everything past it. :-(

Of course, if I separate that line form the ones above and
below, and then type ESC-j, it will fold that line (or what is left of
it, if it was over 1024 characters long) into a proper paragraph. (If I
don't add blank lines above and below, it will fold together everything
up and down to the next blank line, which is often *not* what I wanted. :-)

Enjoy,
DoN.

--
Email: | 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 ---

here is a photo of the completed tool holder sitting on my lathe
http://www.wbnoble.com/tools/floating-holder.JPG
there is one remaining step to complete - I haven't decided the best way to
pin the cylinder that holds the floating holder to the upright steel
pieces - right now I'm thinking of just drilling a hole laterally but maybe
there is a better way?

The MT-3 at the back is pressed in to the bore so I don't need anything to
hold that in place, but when I use a large tap (for example 1.25-8) there is
a lot of torque and I'm reasonably sure the cylinder will turn even though
it's a press fit into the cutouts in the uprights (the uprights are 3/8
wide). I suppose I could weld it, but that might distort the bore of the
cylinder.

thoughts anyone?

I need to do one last thing to my floating tool holder - I need to make sure
the cylindrical part doesn't rotate under torque - (don't tell me "weld
it" - I want to be able to take it apart if I have to). It looks like a 1"
tap might reach 800 inch pounds, and a 2 1/4" tap (the largest I can imagine
using) could push 2000 inch pounds, so that's a reasonable design point.

see prior message (below) for some images after painting, or
http://metalworking.com/dropbox/floa...ool_holder.jpg
http://metalworking.com/dropbox/floa...ool-holder.txt
for images before paint.

If my calculations are right (see below), four #10 screws in grade 8 will be
OK, at something around 5,000 pounds, at a radius of just under 1 inch - I
don't want to go much larger because the uprights are only 3/8......
anyone have any remarks on this?



shear strength soft
steel grade 8
diameter radius area 45000 90,000
#10 0.1389 0.06945 0.015152852 682 1364
"3/16 0.1875 0.09375 0.027611654 1243 2485
1/4 0.25 0.125 0.049087385 2209 4418


"Bill Noble" wrote in message
...
here is a photo of the completed tool holder sitting on my lathe
http://www.wbnoble.com/tools/floating-holder.JPG
there is one remaining step to complete - I haven't decided the best way
to pin the cylinder that holds the floating holder to the upright steel
pieces - right now I'm thinking of just drilling a hole laterally but
maybe there is a better way?

The MT-3 at the back is pressed in to the bore so I don't need anything to
hold that in place, but when I use a large tap (for example 1.25-8) there
is a lot of torque and I'm reasonably sure the cylinder will turn even
though it's a press fit into the cutouts in the uprights (the uprights are
3/8 wide). I suppose I could weld it, but that might distort the bore of
the cylinder.

thoughts anyone?

well, formatting made the table impossible to read, let's try again

shear
strength soft steel grade 8
diameter radius area 45000 90,000
#10 0.1389 0.06945 0.015 682 1364
3/16" 0.1875 0.09375 0.027 1243 2485
1/4" 0.25 0.125 0.0495 2209 4418


"Bill Noble" wrote in message
...
I need to do one last thing to my floating tool holder - I need to make
sure the cylindrical part doesn't rotate under torque - (don't tell me
"weld it" - I want to be able to take it apart if I have to). It looks
like a 1" tap might reach 800 inch pounds, and a 2 1/4" tap (the largest I
can imagine using) could push 2000 inch pounds, so that's a reasonable
design point.

see prior message (below) for some images after painting, or
http://metalworking.com/dropbox/floa...ool_holder.jpg
http://metalworking.com/dropbox/floa...ool-holder.txt
for images before paint.

If my calculations are right (see below), four #10 screws in grade 8 will
be OK, at something around 5,000 pounds, at a radius of just under 1
inch - I don't want to go much larger because the uprights are only
3/8...... anyone have any remarks on this?



shear strength soft steel grade 8
diameter radius area 45000 90,000
#10 0.1389 0.06945 0.015152852 682 1364
"3/16 0.1875 0.09375 0.027611654 1243 2485
1/4 0.25 0.125 0.049087385 2209 4418


"Bill Noble" wrote in message
...
here is a photo of the completed tool holder sitting on my lathe
http://www.wbnoble.com/tools/floating-holder.JPG
there is one remaining step to complete - I haven't decided the best way
to pin the cylinder that holds the floating holder to the upright steel
pieces - right now I'm thinking of just drilling a hole laterally but
maybe there is a better way?

The MT-3 at the back is pressed in to the bore so I don't need anything
to hold that in place, but when I use a large tap (for example 1.25-8)
there is a lot of torque and I'm reasonably sure the cylinder will turn
even though it's a press fit into the cutouts in the uprights (the
uprights are 3/8 wide). I suppose I could weld it, but that might
distort the bore of the cylinder.

thoughts anyone?

On Fri, 28 May 2010 22:58:02 -0700, Bill Noble wrote:
"Bill Noble" wrote
I need to do one last thing to my floating tool holder - I need to make
sure the cylindrical part doesn't rotate under torque - (don't tell me
"weld it" - I want to be able to take it apart if I have to). It looks
like a 1" tap might reach 800 inch pounds, and a 2 1/4" tap (the
largest I can imagine using) could push 2000 inch pounds, so that's a
reasonable design point.

see prior message ... for some images after painting, or
http://metalworking.com/dropbox/floa...ool_holder.jpg
http://metalworking.com/dropbox/floa...ool-holder.txt

If my calculations are right (see below), four #10 screws in grade 8
will be OK, at something around 5,000 pounds, at a radius of just under
1 inch - I don't want to go much larger because the uprights are only
3/8...... anyone have any remarks on this?
....
shear strength soft steel grade 8

diameter radius area 45000 90,000
#10 0.1389 0.06945 0.015 682 1364
3/16" 0.1875 0.09375 0.027 1243 2485
1/4" 0.25 0.125 0.0495 2209 4418


It isn't clear to me where you plan to put the bolts. Would they
run parallel to the axis of the cylinder, with two into each end of
the cylinder through 3/8" plate? If so, it seems to me that the
whole assembly would cock slightly, ie, one side would lift off the
way, long before even much smaller bolts would be near breaking.
The bottom plate is just sitting on the way, isn't it?

--
jiw

"James Waldby" wrote in message
...
On Fri, 28 May 2010 22:58:02 -0700, Bill Noble wrote:
"Bill Noble" wrote
I need to do one last thing to my floating tool holder - I need to make
sure the cylindrical part doesn't rotate under torque - (don't tell me
"weld it" - I want to be able to take it apart if I have to). It looks
like a 1" tap might reach 800 inch pounds, and a 2 1/4" tap (the
largest I can imagine using) could push 2000 inch pounds, so that's a
reasonable design point.

see prior message ... for some images after painting, or
http://metalworking.com/dropbox/floa...ool_holder.jpg
http://metalworking.com/dropbox/floa...ool-holder.txt

If my calculations are right (see below), four #10 screws in grade 8
will be OK, at something around 5,000 pounds, at a radius of just under
1 inch - I don't want to go much larger because the uprights are only
3/8...... anyone have any remarks on this?
...
shear strength soft steel grade 8

diameter radius area 45000 90,000
#10 0.1389 0.06945 0.015 682 1364
3/16" 0.1875 0.09375 0.027 1243 2485
1/4" 0.25 0.125 0.0495 2209 4418


It isn't clear to me where you plan to put the bolts. Would they
run parallel to the axis of the cylinder, with two into each end of
the cylinder through 3/8" plate? If so, it seems to me that the
whole assembly would cock slightly, ie, one side would lift off the
way, long before even much smaller bolts would be near breaking.
The bottom plate is just sitting on the way, isn't it?

my plan is to drill perpendicular to the axis of the cylinder through the
3/8 plate and put one bolt in from the back, and on from the front of the
holder, on the tailstock and on the headstock side, four total.

yes, the bottom is just sitting on the way, though I could easily enough add
a clamp - however, the back has an MT3 taper so it is held down by the
tailstock and the front will be held down by the tap or reamer, so I don't
think it will lift as you suggest - though only time will tell - once I get
the final "anti rotation" feature installed, I can test it