I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

--
Due to extreme spam originating from Google Groups, and their inattention
to spammers, I and many others block all articles originating
from Google Groups. If you want your postings to be seen by
more readers you will need to find a different means of
posting on Usenet.
http://improve-usenet.org/

I think I'd be leary of buying a used chuck unless I had a chance to
test it first.
For instance: when I took evening machine shop classes for many
semesters, us old guys had to put up with the way the machinery was beat
up by the "kids" in the day classes. They didn't take time to clean
chucks, let things slip in the jaws, beat on them, etc., etc., etc..


Pete Stanaitis
------------------

Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

I cruised enco for the above. Condidering the discount from new, I doubt you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest.

I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a collet setup for the
small stuff.

Wes

On 2009-01-17, Wes wrote:
Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

I cruised enco for the above. Condidering the discount from new, I doubt you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest.

Maybe I am missing something.

Enco lists a 8 inch three jaw Bison chuck -- with no backplate -- for
$854. See their item 272-6002. I bought a 8 inch three jaw Bison chuck
with L0 mount, for $50. (first auction).

Enco lists a 10 inch Bison three jaw chuck for $1,095 (item
272-6004). Again, no mount or backplate. I bought a 10 inch chuck with
L0 backplate, for $127.

I think that it is not a bad discount from new. You are right and they
might have problems. But then they may not have any problems. Most of
the stuff that I buy does not have undisclosed problems. The seller is
a 100% feedback and he says they are in very good condition. And, why
would he have two bad condition chucks?

If all goes well, am going to sell by bad Burnerd chuck with full
disclosure of its alignment problems. I might get $10-20 for it.

i




I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a collet setup for the
small stuff.



--
Due to extreme spam originating from Google Groups, and their inattention
to spammers, I and many others block all articles originating
from Google Groups. If you want your postings to be seen by
more readers you will need to find a different means of
posting on Usenet.
http://improve-usenet.org/

"Wes" wrote in message
...
Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

I cruised enco for the above. Condidering the discount from new, I doubt
you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over
5C collet sizes
and use the 4 jaw for the rest.

I'm not going to ask you how many items you have turned so far but if if
has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that
I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved
by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to
have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a
collet setup for the
small stuff.

Wes

Another 4-jaw guy. I have two 4-jaws, one small and one really big. If I
switch at all, it's between those two. And I have 3, 3-jaws that are
gathering dust.

--
Ed Huntress

On 2009-01-17, Ignoramus27724 wrote:
I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.


Forgot to say Wes, I am using the lathe every other day since I got
the lathe to work well, but I am running of round stock.

--
Due to extreme spam originating from Google Groups, and their inattention
to spammers, I and many others block all articles originating
from Google Groups. If you want your postings to be seen by
more readers you will need to find a different means of
posting on Usenet.
http://improve-usenet.org/

I bought a brand new import special 6" 3 jaw chuck from an e-bay
storefront a couple years ago. About $90 including delivery. Made a back
plate from a chunk of hot rolled plate with the 1-1/2x8 thread for my
Logan. Runs about .002" TIR. This replaced the original that came with
the lathe, had about .020" TIR.

Ignoramus27724 wrote:
On 2009-01-17, Wes wrote:
Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.
I cruised enco for the above. Condidering the discount from new, I doubt you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest.

Maybe I am missing something.

Enco lists a 8 inch three jaw Bison chuck -- with no backplate -- for
$854. See their item 272-6002. I bought a 8 inch three jaw Bison chuck
with L0 mount, for $50. (first auction).

Enco lists a 10 inch Bison three jaw chuck for $1,095 (item
272-6004). Again, no mount or backplate. I bought a 10 inch chuck with
L0 backplate, for $127.

I think that it is not a bad discount from new. You are right and they
might have problems. But then they may not have any problems. Most of
the stuff that I buy does not have undisclosed problems. The seller is
a 100% feedback and he says they are in very good condition. And, why
would he have two bad condition chucks?

If all goes well, am going to sell by bad Burnerd chuck with full
disclosure of its alignment problems. I might get $10-20 for it.

i



I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a collet setup for the
small stuff.

On 2009-01-17, RoyJ wrote:
I bought a brand new import special 6" 3 jaw chuck from an e-bay
storefront a couple years ago. About $90 including delivery. Made a back
plate from a chunk of hot rolled plate with the 1-1/2x8 thread for my
Logan. Runs about .002" TIR. This replaced the original that came with
the lathe, had about .020" TIR.

My lathe has L0 mount, a little harder to make. Did you buy yours from
Discount Machine?

i

Ignoramus27724 wrote:
On 2009-01-17, Wes wrote:
Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.
I cruised enco for the above. Condidering the discount from new, I doubt you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest.

Maybe I am missing something.

Enco lists a 8 inch three jaw Bison chuck -- with no backplate -- for
$854. See their item 272-6002. I bought a 8 inch three jaw Bison chuck
with L0 mount, for $50. (first auction).

Enco lists a 10 inch Bison three jaw chuck for $1,095 (item
272-6004). Again, no mount or backplate. I bought a 10 inch chuck with
L0 backplate, for $127.

I think that it is not a bad discount from new. You are right and they
might have problems. But then they may not have any problems. Most of
the stuff that I buy does not have undisclosed problems. The seller is
a 100% feedback and he says they are in very good condition. And, why
would he have two bad condition chucks?

If all goes well, am going to sell by bad Burnerd chuck with full
disclosure of its alignment problems. I might get $10-20 for it.

i



I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a collet setup for the
small stuff.




--
Due to extreme spam originating from Google Groups, and their inattention
to spammers, I and many others block all articles originating
from Google Groups. If you want your postings to be seen by
more readers you will need to find a different means of
posting on Usenet.
http://improve-usenet.org/

On 2009-01-15, Ignoramus18994 wrote:
I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

The general rule for a 3-jaw chuck is to go about half the
maximum swing. Thus for my 12" Clausing, a 6" (or 6-1/4" as the nearest
Bison size) is about right.

Was yours a 14" lathe? If so, then the 8" would probably be the
better choice. Check to see whether the jaws at maximum extension hit
the ways.

4-jaw chucks can come closer. I have a 10" on my 12" Clausing.

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 ---

You would need the LO mount #274-0210 at $121 from Enco, probably get a
sale price sooner or later. But the L series stuff seems to be much more
expensive than D series.

You might check to see if your bad chuck has a removable backing plate.
Or, it it really trashed, you might be able to machine off the chuck and
just salvage the backing plate.

Ignoramus27724 wrote:
On 2009-01-17, RoyJ wrote:
I bought a brand new import special 6" 3 jaw chuck from an e-bay
storefront a couple years ago. About $90 including delivery. Made a back
plate from a chunk of hot rolled plate with the 1-1/2x8 thread for my
Logan. Runs about .002" TIR. This replaced the original that came with
the lathe, had about .020" TIR.

My lathe has L0 mount, a little harder to make. Did you buy yours from
Discount Machine?

i

Ignoramus27724 wrote:
On 2009-01-17, Wes wrote:
Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.
I cruised enco for the above. Condidering the discount from new, I doubt you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest.
Maybe I am missing something.

Enco lists a 8 inch three jaw Bison chuck -- with no backplate -- for
$854. See their item 272-6002. I bought a 8 inch three jaw Bison chuck
with L0 mount, for $50. (first auction).

Enco lists a 10 inch Bison three jaw chuck for $1,095 (item
272-6004). Again, no mount or backplate. I bought a 10 inch chuck with
L0 backplate, for $127.

I think that it is not a bad discount from new. You are right and they
might have problems. But then they may not have any problems. Most of
the stuff that I buy does not have undisclosed problems. The seller is
a 100% feedback and he says they are in very good condition. And, why
would he have two bad condition chucks?

If all goes well, am going to sell by bad Burnerd chuck with full
disclosure of its alignment problems. I might get $10-20 for it.

i



I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a collet setup for the
small stuff.

RoyJ fired this volley in
m:

Or, it it really trashed, you might be able to machine off the chuck
and
just salvage the backing plate.

nah... my employees will do that for me -- without my asking.

G
LLoyd

On 2009-01-17, RoyJ wrote:
You would need the LO mount #274-0210 at $121 from Enco, probably get a
sale price sooner or later. But the L series stuff seems to be much more
expensive than D series.

Both of these already have L-0 mounts.

You might check to see if your bad chuck has a removable backing plate.
Or, it it really trashed, you might be able to machine off the chuck and
just salvage the backing plate.

I will try to see what I can do with the bad chuck. It does have a
removable backing plate. But if a used "good condition" 8 inch three
jaw chuck costs just $50, which is what I just paid on ebay, then it
may be uneconomical to do much with it.

i

Ignoramus27724 wrote:
On 2009-01-17, RoyJ wrote:
I bought a brand new import special 6" 3 jaw chuck from an e-bay
storefront a couple years ago. About $90 including delivery. Made a back
plate from a chunk of hot rolled plate with the 1-1/2x8 thread for my
Logan. Runs about .002" TIR. This replaced the original that came with
the lathe, had about .020" TIR.

My lathe has L0 mount, a little harder to make. Did you buy yours from
Discount Machine?

i

Ignoramus27724 wrote:
On 2009-01-17, Wes wrote:
Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.
I cruised enco for the above. Condidering the discount from new, I doubt you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest.
Maybe I am missing something.

Enco lists a 8 inch three jaw Bison chuck -- with no backplate -- for
$854. See their item 272-6002. I bought a 8 inch three jaw Bison chuck
with L0 mount, for $50. (first auction).

Enco lists a 10 inch Bison three jaw chuck for $1,095 (item
272-6004). Again, no mount or backplate. I bought a 10 inch chuck with
L0 backplate, for $127.

I think that it is not a bad discount from new. You are right and they
might have problems. But then they may not have any problems. Most of
the stuff that I buy does not have undisclosed problems. The seller is
a 100% feedback and he says they are in very good condition. And, why
would he have two bad condition chucks?

If all goes well, am going to sell by bad Burnerd chuck with full
disclosure of its alignment problems. I might get $10-20 for it.

i



I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a collet setup for the
small stuff.




--
Due to extreme spam originating from Google Groups, and their inattention
to spammers, I and many others block all articles originating
from Google Groups. If you want your postings to be seen by
more readers you will need to find a different means of
posting on Usenet.
http://improve-usenet.org/

On Jan 16, 6:52*pm, Wes wrote:
Ignoramus18994 wrote:
I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

* * * * 300285582565 - Bison 3 jaw L0 mount *8 inch -- $50
* * * * 300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

I cruised enco for the above. *Condidering the discount from new, I doubt you are going to
get a bargain. *Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest. *

I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. *I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. *Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. *Until then, just use the 4 jaw, and get a collet setup for the
small stuff.

Wes

Wes is correct on this.

On Jan 16, 7:24*pm, Ignoramus27724 ignoramus27...@NOSPAM.
27724.invalid wrote:
On 2009-01-17, Wes wrote:

Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

* * * * 300285582565 - Bison 3 jaw L0 mount *8 inch -- $50
* * * * 300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

I cruised enco for the above. *Condidering the discount from new, I doubt you are going to
get a bargain. *Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest. *

Maybe I am missing something.

Enco lists a 8 inch three jaw Bison chuck -- with no backplate -- for
$854. See their item 272-6002. I bought a 8 inch three jaw Bison chuck
with L0 mount, for $50. (first auction).

Enco lists a 10 inch Bison three jaw chuck for $1,095 (item
272-6004). Again, no mount or backplate. I bought a 10 inch chuck with
L0 backplate, for $127.

I think that it is not a bad discount from new. You are right and they
might have problems. But then they may not have any problems. Most of
the stuff that I buy does not have undisclosed problems. The seller is
a 100% feedback and he says they are in very good condition. And, why
would he have two bad condition chucks?

If all goes well, am going to sell by bad Burnerd chuck with full
disclosure of its alignment problems. I might get $10-20 for it.

i



I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. *I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. *Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. *Until then, just use the 4 jaw, and get a collet setup for the
small stuff.

--
* *Due to extreme spam originating from Google Groups, and their inattention
* * * to spammers, I and many others block all articles originating
* * * *from Google Groups. If you want your postings to be seen by
* * * * *more readers you will need to find a different means of
* * * * * * * * * * * *posting on Usenet.
* * * * * * * * * *http://improve-usenet.org/

You are doing okay Ig.

Most people are not surplus literate like you are.

Wes is just pointing out a method to keeping working while waiting for
that great surplus score.

I too have seen alot of junk chucks..in fact the first one I bought
when I was a kid was from a "trusted" source and later I found the
scroll of the chuck was trashed...and the seller knew it.

Lesson learned.


TMT

On Fri, 16 Jan 2009 19:52:02 -0500, Wes wrote:

Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

I cruised enco for the above. Condidering the discount from new, I doubt you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over 5C collet sizes
and use the 4 jaw for the rest.

I'm not going to ask you how many items you have turned so far but if if has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a collet setup for the
small stuff.

Wes

I run a 3-jaw about 99% of the time. Perhaps the issue is what kind
of parts are being made. If the part can be made without need for
re-chucked second operations and it'll be smaller than rawstock then
centering inaccuracy is irrelevant. One can turn a part to tenths
precision in a wonky chuck. The part may not be well-centered on
the rawstock -- who cares after it's parted off?

"Don Foreman" wrote in message
news
On Fri, 16 Jan 2009 19:52:02 -0500, Wes wrote:

Ignoramus18994 wrote:

I tried to find an inexpensive three jaw chuck for L-0 mount to
replace my bad three jaw chuck. Finally found these two ebay items:

300285582565 - Bison 3 jaw L0 mount 8 inch -- $50
300285584382 - Bison 3 jaw L0 mount 10 inch -- $127

I may end up keeping just one of them.

I cruised enco for the above. Condidering the discount from new, I doubt
you are going to
get a bargain. Pry that wallet open and get a small chuck for stuff over
5C collet sizes
and use the 4 jaw for the rest.

I'm not going to ask you how many items you have turned so far but if if
has been seldom,
then keep your eye out for a deal and use the 4 jaw. I have a 6" L00 that
I have not
mounted since the 4 jaw was attached and I yet to feel that the time saved
by a centering
chuck beat the time and effort to remove the four jaw.

Neither one of us are running production. Keep the 3 jaw in the nice to
have column and
if you get a deal, gloat. Until then, just use the 4 jaw, and get a
collet setup for the
small stuff.

Wes

I run a 3-jaw about 99% of the time. Perhaps the issue is what kind
of parts are being made. If the part can be made without need for
re-chucked second operations and it'll be smaller than rawstock then
centering inaccuracy is irrelevant. One can turn a part to tenths
precision in a wonky chuck. The part may not be well-centered on
the rawstock -- who cares after it's parted off?

It depends on what you make, of course. If you make rivets or screws all day
long, a 3-jaw is great. g

Just looking at the typical range of hobby work -- certainly my limited
hobby work -- the percentage of parts that I would machine in single
chuckings from round barstock is pretty small. And I suspect that's true for
most people who make model engines, or most of the other hobby metalworking
projects.

As Wes says, you can work almost at fast with a 4-jaw on parts you could
handle with a 3-jaw. And it's a lot less hassle than swapping chucks all the
time. That's why my 3-jaws spend their lives in a drawer, waiting for the
economy to collapse and for me to go into competition with the Chinese
making sewing thimbles and bronze replacement bushings for antique kitchen
appliances. g

--
Ed Huntress

On 2009-01-18, Don Foreman wrote:

[ ... ]

I run a 3-jaw about 99% of the time.

For me, it depends on the size. I'm more likely to use collets
if the workpiece will fit.

Perhaps the issue is what kind
of parts are being made. If the part can be made without need for
re-chucked second operations and it'll be smaller than rawstock then
centering inaccuracy is irrelevant. One can turn a part to tenths
precision in a wonky chuck. The part may not be well-centered on
the rawstock -- who cares after it's parted off?

Well ... as a friend and co-worker used to say (as he chucked up
a 4" diameter chunk of aluminum to make a 0.750" part) -- "The best
metal is in the middle." :-)

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 ---