I have the opportunity to pick up a Buck 4 inch, 3-Jaw, set-tru lathe chuck and would look to create a back plate so I could use it with my mini-lathe if possible.

(I have the original version of this lath: http://www.micromark.com/microlux-7-...the,8176.html).

I'd appreciate any advice as far as whether this would be plausible and the pros and cons.

Thanks a lot.

Darren Harris
Staten Island, New York.

To be more specific, this is the one I was looking at: http://www.ebay.com/itm/281516944324

Thanks.

Darren Harris
Staten Island, New York.

On 12/7/2014 7:35 PM, wrote:
To be more specific, this is the one I was looking at: http://www.ebay.com/itm/281516944324

Thanks.

Darren Harris
Staten Island, New York.

I hope you are a machinist - doing a chuck plate is tricky.

Not that I have done it, but consider :

Mount plate on the lathe - conquer that first. Round plate.
Then lightly scribe a ring on the plate that is the exact center.
Hum that seems to be a trick.
Chuck on paper. Drop through mounting holes centering pins -
looks like drills with a sharp point and no flouts. That will define
the circle - draw one - that passes over each pin prick. Measure circle
cut ring on the plate - ever so lightly.
Then lightly scribe a ring on the plate that is the exact center of each
hole and scribe the hole with a punch again.

Remember the accuracy of the back plate determines what the chuck will
turn out.

Also the numbers on the face of the Buck are there to identify which jaw
is placed in that jaw slot. Those very likely can be turned tail end
into first for outward pressure on cylinders... e.g. put 3 into 3...
and start the Number 1 into the scroll and then 2 and finally 3.
They should all meet in the center if you caught the first thread on the
internal scroll on all three as it turned around the chuck.

I have a Sheldon 11-44 Chrome way wonderful lathe My dad and I bought
in 1952. It sports 2 Buck chucks. a 3 and a 4 jaw.

Martin

On Sun, 7 Dec 2014 17:35:57 -0800 (PST),
wrote:

To be more specific, this is the one I was looking at: http://www.ebay.com/itm/281516944324

Thanks.

Darren Harris
Staten Island, New York.

Ive got 3 such chucks for my HLV-H. They work ok. Jaws can be
purchased.

Gunner

"At the core of liberalism is the spoiled child,
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosophy of sniveling brats."
PJ O'Rourke

On Sunday, December 7, 2014 11:37:23 PM UTC-5, Gunner Asch wrote:
On Sun, 7 Dec 2014 17:35:57 -0800 (PST),
wrote:

To be more specific, this is the one I was looking at: http://www.ebay.com/itm/281516944324

Thanks.

Darren Harris
Staten Island, New York.

Ive got 3 such chucks for my HLV-H. They work ok. Jaws can be
purchased.

Gunner

"At the core of liberalism is the spoiled child,
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosophy of sniveling brats."
PJ O'Rourke

"They work ok"?

Hmmmm. Perhaps "Ok" may not seem worth the trouble for a used chuck?

I do already have the stock 3" and also a 5" for my mini lathe. I'm just wondering if that particular Ebay chuck is a better option than a regular 4".

(I want the option of using all three chucks on my 6" milling table also).

Darren Harris
Staten Island, New York.

On Mon, 8 Dec 2014 15:04:25 -0800 (PST),
wrote:

On Sunday, December 7, 2014 11:37:23 PM UTC-5, Gunner Asch wrote:
On Sun, 7 Dec 2014 17:35:57 -0800 (PST),
wrote:

To be more specific, this is the one I was looking at: http://www.ebay.com/itm/281516944324

Thanks.

Darren Harris
Staten Island, New York.

Ive got 3 such chucks for my HLV-H. They work ok. Jaws can be
purchased.

Gunner

"At the core of liberalism is the spoiled child,
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosophy of sniveling brats."
PJ O'Rourke

"They work ok"?

Hmmmm. Perhaps "Ok" may not seem worth the trouble for a used chuck?

I do already have the stock 3" and also a 5" for my mini lathe. I'm just wondering if that particular Ebay chuck is a better option than a regular 4".

(I want the option of using all three chucks on my 6" milling table also).

Darren Harris
Staten Island, New York.

The Adjust-tru feature allows you to adjust the runout of the chuck
for reworking parts. That is with a brand new or nearly new chuck. As
they get banged around...they start getting more and more wear on the
jaws and screw/gear and start working well AT ONE DIAMETER.. which
works ok if you are only doing one or two parts at a time. They will
work well enough at another diameter..but you of course will have to
adjust the chuck with the new part size

Thats what I use mine for... less than 5 or so parts. If I have to do
more than that..Ill bore a oversized collet

They are very much worth having on hand. I in addition, have at least
(2) 6 jaw Adjust tru chucks as well..but IRRC..they are 6"

https://picasaweb.google.com/1040422...16675438810482

Just some of my chucks..


Gunner



"At the core of liberalism is the spoiled child,
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosophy of sniveling brats."
PJ O'Rourke

Thanks.

My immediate project will entail turning down the end of 3/8" square rods to 1/4" diameter to allow the rods to fit and turn freely between two plates which will have 1/4" holes. (If things work out I may have to make a few hundred).

So I guess I'm not doing anything that requires absolute precision, but the basic option of being able to turn many rods down to a single consistent diameter (from one end to the other) would be nice.

Darren Harris
Staten Island, New York.

On 12/10/2014 7:06 PM, wrote:
Thanks.

My immediate project will entail turning down the end of 3/8" square rods to 1/4" diameter to allow the rods to fit and turn freely between two plates which will have 1/4" holes. (If things work out I may have to make a few hundred).

So I guess I'm not doing anything that requires absolute precision, but the basic option of being able to turn many rods down to a single consistent diameter (from one end to the other) would be nice.

Darren Harris
Staten Island, New York.


Oh, oh, oh ... why didn't you say so? Square stock does not center in a
3-jaw! Your best bet would be a square collet. Second best a 4-jaw.
Third best: spacers to center in a 3-jaw. Fourth ... never mind.

Bob

"Bob Engelhardt" wrote in message
...
On 12/10/2014 7:06 PM, wrote:
Thanks.

My immediate project will entail turning down the end of 3/8"
square rods to 1/4" diameter to allow the rods to fit and turn
freely between two plates which will have 1/4" holes. (If things
work out I may have to make a few hundred).

So I guess I'm not doing anything that requires absolute precision,
but the basic option of being able to turn many rods down to a
single consistent diameter (from one end to the other) would be
nice.

Darren Harris
Staten Island, New York.


Oh, oh, oh ... why didn't you say so? Square stock does not center
in a 3-jaw! Your best bet would be a square collet. Second best a
4-jaw. Third best: spacers to center in a 3-jaw. Fourth ... never
mind.

Bob

Here are some 4-jaw self centering chucks, quality unknown:
http://www.shars.com/product_categor...g_Lathe_Chucks

In the old days they used 2-jaw self-centering chucks with vee-grooved
jaws to hold square stock.
http://cnfed2.en.made-in-china.com/p...ng-Chucks.html
You machine the jaw clamping faces to fit your work.
-jsw

On 2014-12-11, wrote:
Thanks.

My immediate project will entail turning down the end of 3/8" square
rods to 1/4" diameter to allow the rods to fit and turn freely between
two plates which will have 1/4" holes. (If things work out I may have to
make a few hundred).

With the 3-jaw chuck? It will be difficult to chuck the square
rods to anything like on center with a 3-jaw chuck. A universal 4-jaw
would be much more convenient (one with a scroll plate so the jaws move
at the same time. The usual independent would not be too bad, if you
mark two of the jaws to leave untouched while changing the rods.

A better way would be to turn between centers (live center in
the tailstock, dead center in the spindle with a driving plate and a
dog. Center drill both ends, turn one end to the needed round diameter,
then swap ends (moving the dog) and turn the other. As long as your
center drills are accurate that will probably be better than any chuck
work -- unless you have the four-jaw universal. (They are not common,
but they do exist. I have one and there are times when it is really
nice to have.

Of course, you could take a piece of stock, run a 3/8" broach
through it after turning the OD to a convenient size and boring it for
the broach. Then slit the stock so when the 3-jaw tightens on it, it
will clamp the square workpiece.

The offset in a Set-Tru chuck of that size is not going to be
enough to adjust for centering on square stock held in 3 jaws.

So I guess I'm not doing anything that requires absolute precision,
but the basic option of being able to turn many rods down to a single
consistent diameter (from one end to the other) would be nice.

Oh? I thought that you were just turning the ends to allow them
to fit in bearings or bushings, and leaving the middle square to bolt
things to.

Darren Harris
Staten Island, New York.

Good Luck,
DoN.

--
Remove oil spill source from e-mail
Email: | (KV4PH) 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 ---

On Wed, 10 Dec 2014 16:06:38 -0800 (PST),
wrote:

Thanks.

My immediate project will entail turning down the end of 3/8" square rods to 1/4" diameter to allow the rods to fit and turn freely between two plates which will have 1/4" holes. (If things work out I may have to make a few hundred).

So I guess I'm not doing anything that requires absolute precision, but the basic option of being able to turn many rods down to a single consistent diameter (from one end to the other) would be nice.

Darren Harris
Staten Island, New York.

Order a 3/8 square collet or have one burned

Your lathe capable of 5C collets?

Btw...3 jaw chucks dont work worth a **** on 4 sided objects. Just a
heads up.


"At the core of liberalism is the spoiled child,
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosophy of sniveling brats."
PJ O'Rourke

No, turning the square stock is just my "immediate project".

But I was looking into getting the Set Tru for round stock where I need consistent result from one part to the next.

As I mentioned I have a 3" 3-jaw self-centering chuck and a 5" 4-jaw chuck I had gotten for a special project.

So I was looking at the 4" 3-jaw Set-Tru as something to add to my collection. Something that may give me more options than a regular 4" chuck for some future project involving high volume and accuracy.

Thanks.

Darren Harris
Staten Island, New York.

On Saturday, December 13, 2014 8:22:11 PM UTC-5, wrote:
No, turning the square stock is just my "immediate project".

But I was looking into getting the Set Tru for round stock where I need consistent result from one part to the next.

As I mentioned I have a 3" 3-jaw self-centering chuck and a 5" 4-jaw chuck I had gotten for a special project.

So I was looking at the 4" 3-jaw Set-Tru as something to add to my collection. Something that may give me more options than a regular 4" chuck for some future project involving high volume and accuracy.

Thanks.

Darren Harris
Staten Island, New York.

Well, I guess the point is moot, because someone apparently bought the chuck.
http://www.ebay.com/itm/281516944324

Darren Harris
Staten Island, New York.