Date   
Re: Looking for 14 1/2" Southbend parts

eddie.draper@btinternet.com
 

Didn't I read a while back on here that the SB headstock mandrel thread is tapered in some strange way, just to compound your difficulties?  Does anyone know if this is the sort of thread that a taper turning attachment can put on OK, and whether it matters much anyway?  If true, and it mattered, you couldn't finish with an ordinary parallel tap.

Eddie



From: Steven H via Groups.Io <stevesmachining@...>
To: SouthBendLathe@groups.io
Sent: Tuesday, 17 July 2018, 4:23
Subject: Re: [SouthBendLathe] Looking for 14 1/2" Southbend parts

Guess you will have to purchase a blank chuck back plate and internally single point thread your own 2-1/4”-6 thread. That is easier said than done as you need a way to hold the backplate in order to do the machining. Or find a friend or a machine shop to do the work for you.

As of today on eBay, there is a 2-1/4-6 tap for sale at $175 plus $12 shipping. But that will take one large tap wrench to turn a tap that large.

Good luck.

Steve Haskell

On Jul 16, 2018, at 10:40 PM, John M via Groups.Io <cudaboy66@...> wrote:

Steven H,
I wish I was lucky and had the 2 1/4x 8tpi but sadly I do not, from what Ive seen its common on the 10" & 13" sb.
I have talked to a few 14 1/2 owners and sofar everyone I have spoken with either had the cam lock or 2 1/4 x 6 tpi thread on the spindle.

Attaching the 1943 cat reprint that covers all the lathes
<1943_reprint_Catalog_100C.pdf>


Re: Looking for 14 1/2" Southbend parts

Steven H
 

Guess you will have to purchase a blank chuck back plate and internally single point thread your own 2-1/4”-6 thread. That is easier said than done as you need a way to hold the backplate in order to do the machining. Or find a friend or a machine shop to do the work for you.

As of today on eBay, there is a 2-1/4-6 tap for sale at $175 plus $12 shipping. But that will take one large tap wrench to turn a tap that large.

Good luck.

Steve Haskell

On Jul 16, 2018, at 10:40 PM, John M via Groups.Io <cudaboy66@...> wrote:

Steven H,
I wish I was lucky and had the 2 1/4x 8tpi but sadly I do not, from what Ive seen its common on the 10" & 13" sb.
I have talked to a few 14 1/2 owners and sofar everyone I have spoken with either had the cam lock or 2 1/4 x 6 tpi thread on the spindle.

Attaching the 1943 cat reprint that covers all the lathes
<1943_reprint_Catalog_100C.pdf>

Re: Looking for 14 1/2" Southbend parts

John M
 

Steven H,
I wish I was lucky and had the 2 1/4x 8tpi but sadly I do not, from what Ive seen its common on the 10" & 13" sb.
I have talked to a few 14 1/2 owners and sofar everyone I have spoken with either had the cam lock or 2 1/4 x 6 tpi thread on the spindle.

Attaching the 1943 cat reprint that covers all the lathes

Yahoo group still active?

Terry McCreary
 

Just wondering why I'm still getting posts from the Yahoo South Bend group. I thought it was discombooberated.

Best -- Terry

--
Dr. Terry McCreary
Professor Emeritus
Murray State University
Murray KY 42071

Re: Looking for 14 1/2" Southbend parts

Steven H
 

There is a 2-1/4” six tap on eBay for $174 plus $12 shipping if that is indeed what you spindle thread is. You will need one heck of a large tap wrench to try and turn that size tap. You would be better off trying to single point internal thread 6 tpi on your lathe using the largest boring bar you have with a threading tool bit and then using the tap to finish up the thread. 

I just did a job that required a 1-3/8-6 internal thread for a woodworking customers wood lathe spindle. Made him an ER40 collet chuck body. Had a heck of a time trying to cut the internal thread on my Atlas 12” lathe but I think that was because of the puny little preground threading tool I was using. Ended up purchasing a used 1-3/8-6 tap of eBay and finishing up the thread that way and even then it took a lot of effort to turn the tap using a tap wrench with 40 inch long handles. I would have been better off using as large a boring bar as possible (say 1” diameter which I have) and grinding a 5/16” toolbit into a 60 degree threading tool and single pointing it on the lathe.

Steve Haskell

On Jul 16, 2018, at 2:51 PM, Steven H via Groups.Io <stevesmachining@...> wrote:

Get out a scale, a pair of calipers, or a thread pitch gage and check for 6 or 8 tpi. If 8 tpi, then .125” from crest to crest, if 6 tpi, then .167” from crest to crest. So what thread is you spindle regardless of whatever SB documentation you are looking at.

I have a printout of a South Bend CE3458 “installation, operation, maintenance, and parts manual” from 1995 that I found in the Group files and it has a lot of typographical errors  as far as item numbers on the diagrams. So perhaps whatever documentation you are looking at might also be in error as far as 6 or 8 threads per inch.

Steve Haskell

On Jul 16, 2018, at 2:06 PM, Jim_B <jim@...> wrote:

SB says 6 TPI for both the small and large collet

-8
Jim B,

On Jul 16, 2018, at 1:37 PM, Dave Eggebraaten (AF5IA) <eggebraa10@...> wrote:

It is 8 tpi.


On 7/15/2018 4:38 PM, John M via Groups.Io wrote:
I am a little confused, is the thread pitch on the 4 jaws backing 6 or 8 tpi?
I am looking for the 2 1/4x 6 tpi
John

Virus-free. www.avg.com


--
Jim B

Re: Looking for 14 1/2" Southbend parts

Steven H
 

Get out a scale, a pair of calipers, or a thread pitch gage and check for 6 or 8 tpi. If 8 tpi, then .125” from crest to crest, if 6 tpi, then .167” from crest to crest. So what thread is you spindle regardless of whatever SB documentation you are looking at.

I have a printout of a South Bend CE3458 “installation, operation, maintenance, and parts manual” from 1995 that I found in the Group files and it has a lot of typographical errors  as far as item numbers on the diagrams. So perhaps whatever documentation you are looking at might also be in error as far as 6 or 8 threads per inch.

Steve Haskell

On Jul 16, 2018, at 2:06 PM, Jim_B <jim@...> wrote:

SB says 6 TPI for both the small and large collet

-8
Jim B,

On Jul 16, 2018, at 1:37 PM, Dave Eggebraaten (AF5IA) <eggebraa10@...> wrote:

It is 8 tpi.


On 7/15/2018 4:38 PM, John M via Groups.Io wrote:
I am a little confused, is the thread pitch on the 4 jaws backing 6 or 8 tpi?
I am looking for the 2 1/4x 6 tpi
John

Virus-free. www.avg.com


--
Jim B

Re: Looking for 14 1/2" Southbend parts

Steven H
 

Ok, if the spindle thread is indeed 2-1/4”-8, then there is a good selection of semi-finished (pre-threaded) chuck back plates and fully machined back plates available at Shars.com and KBCTools.com

See Shars.com order number 202-5494 (10” OD semi-finished); 202-6234 (5” OD fully machined); 202-6110 (6” OD fully machined); 202-6202 (8” OD fully machined); 202-6601 (for 6” 4 jaw chuck fully machined); 202-6604 (for 8” 4-jaw chuck fully machined); 202-6552(for 6” zero set plain back chucks); 202-6554 (for 8” zero set plain back chucks); 202-5432 (6”); and KBCTools.com Part no. 7-871-063 (6” Bison brand semi-finished), 7-871-083 (8” Bison brand semi-finished); 7-871-103 (10” Bison brand semi finished).

KBC Tools also sells Bison brand rough casting back plates fir 6, 8, 10, 12, and 16” chucks, for these you will have to cut the internal thread and perform all the other machining.

As far as a face plate or drive plate goes, with a little work and perhaps a milling machine, one of the chuck back plates could be machined into a face plate or drive plate. Or forget about milling any slots and just tap it with a series of holes for hold down clamps.

Steve Haskell

On Jul 16, 2018, at 1:37 PM, Dave Eggebraaten (AF5IA) <eggebraa10@...> wrote:

It is 8 tpi.


On 7/15/2018 4:38 PM, John M via Groups.Io wrote:
I am a little confused, is the thread pitch on the 4 jaws backing 6 or 8 tpi?
I am looking for the 2 1/4x 6 tpi
John

Virus-free. www.avg.com

Re: Looking for 14 1/2" Southbend parts

Jim_B
 

SB says 6 TPI for both the small and large collet

-8
Jim B,

On Jul 16, 2018, at 1:37 PM, Dave Eggebraaten (AF5IA) <eggebraa10@...> wrote:

It is 8 tpi.


On 7/15/2018 4:38 PM, John M via Groups.Io wrote:
I am a little confused, is the thread pitch on the 4 jaws backing 6 or 8 tpi?
I am looking for the 2 1/4x 6 tpi
John

Virus-free. www.avg.com


--
Jim B

Re: Looking for 14 1/2" Southbend parts

Dave Eggebraaten (AF5IA)
 

It is 8 tpi.


On 7/15/2018 4:38 PM, John M via Groups.Io wrote:
I am a little confused, is the thread pitch on the 4 jaws backing 6 or 8 tpi?
I am looking for the 2 1/4x 6 tpi
John

Virus-free. www.avg.com

Re: Looking for 14 1/2\ Southbend parts

eddie.draper@btinternet.com
 

If not answered by Wednesday, I can measure ours next time I visit the railway.  Ours is the "small" spindle 14.5" lathe, dated Sept or Oct 1943.

Eddie



From: Steven H via Groups.Io <stevesmachining@...>
To: SouthBendLathe@groups.io
Sent: Monday, 16 July 2018, 14:15
Subject: Re: [SouthBendLathe] Looking for 14 1/2\ Southbend parts

Regarding the 14-1/2” lathe spindle thread. My 1943 South Bend Lathe catalog reprint lists spindle nose thread as 2-1/4-6. I see lots of chuck back plates in Shars catalog at 2-1/4-8 but NOT 6 threads per inch. 

Is six or eight the actual tpi on the 14-1/2” lathe?

Steve Haskell

On Jul 16, 2018, at 9:03 AM, Steven H via Groups.Io <stevesmachining@...> wrote:

He is asking about the external spindle thread not the spindle internal taper.

Steve Haskell

On Jul 16, 2018, at 2:15 AM, Steven Schlegel <sc.schlegel@...> wrote:

What is the publication date of the SB-7324.pdf document? I have two 1947 and one 1949 9in lathes. I thought the spindles we're about a Morris taper 3.

Thanks,
Steven

From: John M via Groups.Io
Sent: Sunday, July 15, 9:05 PM
Subject: Re: [SouthBendLathe] Looking for 14 1/2" Southbend parts
Going by that tooling chart there are 2 sizes on the 14 1/2" , the small is 2 1/4 x 6 tpi and the Large is 2 3/8 x 6tpi  I have the small and finding a backing plate or a dog plate has proven to be a pita. lol




Re: Looking for 14 1/2\ Southbend parts

Steven H
 

Regarding the 14-1/2” lathe spindle thread. My 1943 South Bend Lathe catalog reprint lists spindle nose thread as 2-1/4-6. I see lots of chuck back plates in Shars catalog at 2-1/4-8 but NOT 6 threads per inch. 

Is six or eight the actual tpi on the 14-1/2” lathe?

Steve Haskell

On Jul 16, 2018, at 9:03 AM, Steven H via Groups.Io <stevesmachining@...> wrote:

He is asking about the external spindle thread not the spindle internal taper.

Steve Haskell

On Jul 16, 2018, at 2:15 AM, Steven Schlegel <sc.schlegel@...> wrote:

What is the publication date of the SB-7324.pdf document? I have two 1947 and one 1949 9in lathes. I thought the spindles we're about a Morris taper 3.

Thanks,
Steven

From: John M via Groups.Io
Sent: Sunday, July 15, 9:05 PM
Subject: Re: [SouthBendLathe] Looking for 14 1/2" Southbend parts
Going by that tooling chart there are 2 sizes on the 14 1/2" , the small is 2 1/4 x 6 tpi and the Large is 2 3/8 x 6tpi  I have the small and finding a backing plate or a dog plate has proven to be a pita. lol


South Bend 9" auction St Cloud, MN

Jason Rife
 

Sharing local details. Enjoy
http://www.obermanauction.com/lot-detail/?lotGuid=2b4c4cda-4b13-4c6b-9e1f-3b3200bfbe7c

Re: Looking for 14 1/2\ Southbend parts

Steven H
 

He is asking about the external spindle thread not the spindle internal taper.

Steve Haskell

On Jul 16, 2018, at 2:15 AM, Steven Schlegel <sc.schlegel@...> wrote:

What is the publication date of the SB-7324.pdf document? I have two 1947 and one 1949 9in lathes. I thought the spindles we're about a Morris taper 3.

Thanks,
Steven

From: John M via Groups.Io
Sent: Sunday, July 15, 9:05 PM
Subject: Re: [SouthBendLathe] Looking for 14 1/2" Southbend parts
Going by that tooling chart there are 2 sizes on the 14 1/2" , the small is 2 1/4 x 6 tpi and the Large is 2 3/8 x 6tpi  I have the small and finding a backing plate or a dog plate has proven to be a pita. lol


Re: Looking for 14 1/2\ Southbend parts

Steven Schlegel
 

What is the publication date of the SB-7324.pdf document? I have two 1947 and one 1949 9in lathes. I thought the spindles we're about a Morris taper 3.

Thanks,
Steven

From: John M via Groups.Io
Sent: Sunday, July 15, 9:05 PM
Subject: Re: [SouthBendLathe] Looking for 14 1/2" Southbend parts
To: southbendlathe@groups.io


Going by that tooling chart there are 2 sizes on the 14 1/2" , the small is 2 1/4 x 6 tpi and the Large is 2 3/8 x 6tpi  I have the small and finding a backing plate or a dog plate has proven to be a pita. lol


Re: Looking for 14 1/2" Southbend parts

John M
 

Going by that tooling chart there are 2 sizes on the 14 1/2" , the small is 2 1/4 x 6 tpi and the Large is 2 3/8 x 6tpi  I have the small and finding a backing plate or a dog plate has proven to be a pita. lol

Re: Looking for 14 1/2" Southbend parts

Daughty
 

what exactly are you looking for?


On Sun, Jul 15, 2018, 6:12 PM Jim_B <jim@...> wrote:
In the files

Form 7324 Tooling Dimensions for South Bend Lathes 

2-3/8-6

-8
Jim B,

On Jul 15, 2018, at 5:38 PM, John M via Groups.Io <cudaboy66@...> wrote:

I am a little confused, is the thread pitch on the 4 jaws backing 6 or 8 tpi?
I am looking for the 2 1/4x 6 tpi
John

--
Jim B

Re: Looking for 14 1/2" Southbend parts

Jim_B
 

In the files

Form 7324 Tooling Dimensions for South Bend Lathes 

2-3/8-6

-8
Jim B,

On Jul 15, 2018, at 5:38 PM, John M via Groups.Io <cudaboy66@...> wrote:

I am a little confused, is the thread pitch on the 4 jaws backing 6 or 8 tpi?
I am looking for the 2 1/4x 6 tpi
John

--
Jim B

Re: Looking for 14 1/2" Southbend parts

John M
 

I am a little confused, is the thread pitch on the 4 jaws backing 6 or 8 tpi?
I am looking for the 2 1/4x 6 tpi
John

Re: Looking for 14 1/2" Southbend parts

Dave Eggebraaten (AF5IA)
 

Dimitar,

I missed the thread count on the spindle.  I have an 8 tpi by 2 1/4 or 2 3/8.

You can see it has a back plate.

Sorry Dave

On 7/11/2018 11:12 AM, Rangelov wrote:
Dave,

I really want a 4 independant jaw chuck for my 14-1/2" SB lathe. I would buy outright, but what are you needing?

I prefer to pick up. I plan to be around in most of TX (DFW, Austin, Houston, SA, EP, etc.) as soon as I can. (My home is severely water damaged). I was planning to be in TX now, but...

If you're not in a hurry, perhaps we can work something out.

Thanks,
Dimitar
-----------------------------------------------------------------
Re: Looking for 14 1/2" Southbend parts
From: Dave Eggebraaten (AF5IA)
Date: Mon, 09 Jul 2018 06:51:27 PDT
Subject: Re: Looking for 14 1/2" Southbend parts

    I have a 12" 4 jaw that is 2 1/4 by 6 I think.
I am in TX.
      Heavy , hard to ship.  Will trade for machining stuff
or sell reasonably.
    I have a 14 1/2 with a L00 mount.



---
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Members email address

Rangelov
 

In yahoo groups, members email would be displayed as part of the posting.

I just see a 'handle' in io group postings. If I click on the 'handle', it will launch my Yahoo webmail (which I use to read my email). But the TO: is blank.

How do you get this 'feature' to work?