Date   

Re: 9 inch South Bend Precision Lathe Model A

Gary Frazelle <frazgj@...>
 

I will do it.
I am cleaning out the shop and moving to Kentucky so that was next to clean up.
So I will get some sent tomorrow.

Thanks for the email.

Gary J Frazelle

217-329-4413


On Sunday, February 28, 2021, 09:36:06 PM EST, Daughty <route66330@...> wrote:


Shoot me some pictures of you would 309-825-6050. I live in Bloomington just north of you.

On Sun, Feb 28, 2021, 8:21 PM Gary Frazelle via groups.io <frazgj=yahoo.com@groups.io> wrote:
Hello,
I am brand new to this group.
I have my grandfather's old South Bend lathe,
Catalog No. 744A 4 ft bed.
It does work and operates on both directions.
I do remember him saying that the thread drive was messed up and did not work.
There are a few parts and a second chuck.

I have had this lathe since he passed away 25 years ago.

I am reaching out to see if there is any interest at all.
If so please email and I can send pictures.

Currently the lathe is in my shop in Decatur Illinois.


Re: 9 inch South Bend Precision Lathe Model A

Daughty
 

Shoot me some pictures of you would 309-825-6050. I live in Bloomington just north of you.


On Sun, Feb 28, 2021, 8:21 PM Gary Frazelle via groups.io <frazgj=yahoo.com@groups.io> wrote:
Hello,
I am brand new to this group.
I have my grandfather's old South Bend lathe,
Catalog No. 744A 4 ft bed.
It does work and operates on both directions.
I do remember him saying that the thread drive was messed up and did not work.
There are a few parts and a second chuck.

I have had this lathe since he passed away 25 years ago.

I am reaching out to see if there is any interest at all.
If so please email and I can send pictures.

Currently the lathe is in my shop in Decatur Illinois.


9 inch South Bend Precision Lathe Model A

frazgj@...
 

Hello,
I am brand new to this group.
I have my grandfather's old South Bend lathe,
Catalog No. 744A 4 ft bed.
It does work and operates on both directions.
I do remember him saying that the thread drive was messed up and did not work.
There are a few parts and a second chuck.

I have had this lathe since he passed away 25 years ago.

I am reaching out to see if there is any interest at all.
If so please email and I can send pictures.

Currently the lathe is in my shop in Decatur Illinois.

Gary
frazgj@...


Re: Threading Stop Bolt

wlw19958
 

Hi There,

Nice screw,…what are the dimensions?

The original I have from the 9" and 10K looks like this



The screw close up looks like this (next to one I made with the real fine knurling)



I thought the original lacked "pizzazz" and I liked the look of the bigger screw I
pictured earlier so, I made mine to mimic the larger one some.

Dimensions of the original:  OAL = 2.375",  Threaded shank: 1.930", 1/4-20 Threads
extending up shank from the end: 1.210" diameter of shank: .243".  Head diameter:
.452", Length: .443".

The ones I made vary a tiny bit from one another.  Seeing you guys liked the 25 tpi
one, I'll give its dimensions.  OAL = 2.450", Shank = 2.00",  Threaded section = 1.420"
Diameter of shank = .250",  Head diameter = .532" ( I started with .511" before knurling ),
Head length = .446", Undercut below knurling = .471".

I made all of mine from 1144 Stressproof® steel.  The other two I just used 1/2" stock.
the "medium" knurled one I wanted to have a slightly larger head so I turned down
some 5/8" stock I had to .511".


Good Luck!
-Blue Chips-
Webb


Re: Looking For A Special Tap

Bill in OKC too
 

A 3/8-20 LH tap might be easier to find. Not worth changing sized if you have most of the parts,. but if you have to re-make everything, it might be an easier way to deal.

I know I had a couple of them around here, but it's been a couple of years since I last saw them. I am doing major work in my shop setup and organization push, if you haven't found what you need I might have found them in a couple of weeks. 

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)


A human being should be able to change a diaper, plan an invasion,
butcher a hog, conn a ship, design a building, write a sonnet, balance
accounts, build a wall, set a bone, comfort the dying, take orders,
give orders, cooperate, act alone, solve equations, analyze a new
problem, pitch manure, program a computer, cook a tasty meal, fight
efficiently, die gallantly. Specialization is for insects.
LAZARUS LONG (Robert A. Heinlein)





On Saturday, February 27, 2021, 03:41:32 PM CST, wlw19958 <wlw-19958@...> wrote:


Hi There,

Paula was one of the people that opted to use a 3/8-16 LH tap to make her
fingers and screw.  I have some of her engineer drawings she made of the
parts I need to make (but not that drawing).  Thanks for posting it. 

I have contacted three firms that offer custom tap and dies.  We'll wait and
see what develops.

Good Luck!
-Blue Chips-
Webb


Re: Looking For A Special Tap

wlw19958
 

Hi There,

Paula was one of the people that opted to use a 3/8-16 LH tap to make her
fingers and screw.  I have some of her engineer drawings she made of the
parts I need to make (but not that drawing).  Thanks for posting it. 

I have contacted three firms that offer custom tap and dies.  We'll wait and
see what develops.

Good Luck!
-Blue Chips-
Webb


Re: Threading Stop Bolt

Ruud
 

Nice screw,…what are the dimensions?

 

Ruud Silvertant

 

Van: motopreserveshop
Verzonden: zaterdag 27 februari 2021 20:55
Aan: SouthBendLathe@groups.io
Onderwerp: Re: [SouthBendLathe] Threading Stop Bolt

 

Those look superb. I like the center knurl as well. Not too much, not too little :)



On Feb 27, 2021, at 2:53 PM, Steve Wells <wswells@...> wrote:



25 looks just right!!

 

Steve

 

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf Of wlw19958
Sent: Saturday, February 27, 2021 2:47 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] Threading Stop Bolt

 

Hi There,

Funny you should mention that.  I also made some for my
Heavy Ten.  I have an NOS one for a 9" 10K and according
to the part number, they use the same screw as the Heavy Ten.

Using the dimensions from that screw I made these.

<image001.png>



The original used 30° bevel knurls but I like the 45° bevels.  That matches the
knurling on the knobs of the QC gearbox and other SBL accessories. 

I have 3 different tpi knurls (30, 25 and 20 going from left to right).  I was going
to ask people here which pitch looks best to them.

Good Luck!
-Blue Chips-
Webb

 


Re: Threading Stop Bolt

motopreserveshop
 

Those look superb. I like the center knurl as well. Not too much, not too little :)

On Feb 27, 2021, at 2:53 PM, Steve Wells <wswells@...> wrote:



25 looks just right!!

 

Steve

 

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf Of wlw19958
Sent: Saturday, February 27, 2021 2:47 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] Threading Stop Bolt

 

Hi There,

Funny you should mention that.  I also made some for my
Heavy Ten.  I have an NOS one for a 9" 10K and according
to the part number, they use the same screw as the Heavy Ten.

Using the dimensions from that screw I made these.

<image001.png>


The original used 30° bevel knurls but I like the 45° bevels.  That matches the
knurling on the knobs of the QC gearbox and other SBL accessories. 

I have 3 different tpi knurls (30, 25 and 20 going from left to right).  I was going
to ask people here which pitch looks best to them.

Good Luck!
-Blue Chips-
Webb


Re: Threading Stop Bolt

Steve Wells
 

25 looks just right!!

 

Steve

 

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf Of wlw19958
Sent: Saturday, February 27, 2021 2:47 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] Threading Stop Bolt

 

Hi There,

Funny you should mention that.  I also made some for my
Heavy Ten.  I have an NOS one for a 9" 10K and according
to the part number, they use the same screw as the Heavy Ten.

Using the dimensions from that screw I made these.



The original used 30° bevel knurls but I like the 45° bevels.  That matches the
knurling on the knobs of the QC gearbox and other SBL accessories. 

I have 3 different tpi knurls (30, 25 and 20 going from left to right).  I was going
to ask people here which pitch looks best to them.

Good Luck!
-Blue Chips-
Webb


Re: Threading Stop Bolt

wlw19958
 

Hi There,

Funny you should mention that.  I also made some for my
Heavy Ten.  I have an NOS one for a 9" 10K and according
to the part number, they use the same screw as the Heavy Ten.

Using the dimensions from that screw I made these.



The original used 30° bevel knurls but I like the 45° bevels.  That matches the
knurling on the knobs of the QC gearbox and other SBL accessories. 

I have 3 different tpi knurls (30, 25 and 20 going from left to right).  I was going
to ask people here which pitch looks best to them.

Good Luck!
-Blue Chips-
Webb


Re: Looking For A Special Tap

Steve Wells
 

Steve,

Here’s a drawing from Paula, that show what he has.

The adjuster screw and finger interchange with N-R models (9-10K-10L)

The size is as Webb and Ted stated.

 

Steve Wells

 

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf Of Steven H via groups.io
Sent: Friday, February 26, 2021 7:15 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] Looking For A Special Tap

 

Perhaps your thread is a UTS thread. Here is link to the Wikipedia article: 

https://en.m.wikipedia.org/wiki/Unified_Thread_Standard

 

Steve Haskell

 



On Feb 26, 2021, at 6:28 PM, wlw19958 <wlw-19958@...> wrote:

Hi There, 

There is no question that the screw used to extend the finger
is not an ACME thread.  It isn't a worn ACME either.

<1325885334261.bmp>



When this part is threaded into the finger, there isn't any play (if it were a worn
ACME, there would be lots of play).  Here is a close-up.

<1325885334261.jpg>



What I see is, this thread form is a 60° but has a shallower depth.  I haven't measured
the depth yet.  From the formula in the HTRAL handbook, full depth 10 pitch thread
should be .064952" or .065" (rounding to the nearest thousandth).  This would give
a minor diameter of .245".

The pilot hole in the finger is about 19/64".  This is .297" (rounded).  This means the
tap doesn't have to be made to full thread depth and that should make it stronger.

Some have suggested substituting a 3/8-16 LH tap.  Some have done this when
fabricating parts for these telescoping steadies but if one uses a finer pitch, one
does not get the full range of finger movement and loose some capacity (either
loosing the ability to come all the way to center or not able to open all the way to
maximum for large diameter parts). 

The depth of the thread isn't completely known at this time.  The fingers were modified
to accept a replaceable tip and they were drilled all the way into the bottom of
the 3/8-10 LH threads.  Even though this has happened, I can estimate the original
depth to be about 1-7/8" to 2".  I have purchased some worn fingers that haven't
had any mods so I will be able to get a more accurate measurement once they have
arrived.   Once I know the correct depth, I can pass that on to the makers of the tap
so it can be made accordingly.

Anyway, I do appreciate the suggestions and help I've received so far.

Good Luck!
-Blue Chips-
Webb


Re: Threading Stop Bolt

motopreserveshop
 

I just made one of those for my heavy 10 yesterday! :). Machine came with the stop but no screw. 

Not sure about the larger size though. 

On Feb 27, 2021, at 11:48 AM, wlw19958 <wlw-19958@...> wrote:

Hi There,

While I wait for quotes for the tap, I've got something else to
occupy my time. 

In my collection of spare parts, I have a threading stop bolt
that is too big to be for a Heavy Ten. 

<1325885153969.bmp>


This bolt is 2-7/8" over-all length, 5/16-18 thread.  The knurled head is .635" in
diameter and the head is .440" long. 

The Heavy Ten uses a 1/4" bolt so this is for a bigger lathe.  Does anyone know
what size lathe this is for (13", 14-1/2", 16")?

Thanks in Advance!
-Blue Chips-
Webb


Threading Stop Bolt

wlw19958
 

Hi There,

While I wait for quotes for the tap, I've got something else to
occupy my time. 

In my collection of spare parts, I have a threading stop bolt
that is too big to be for a Heavy Ten. 



This bolt is 2-7/8" over-all length, 5/16-18 thread.  The knurled head is .635" in
diameter and the head is .440" long. 

The Heavy Ten uses a 1/4" bolt so this is for a bigger lathe.  Does anyone know
what size lathe this is for (13", 14-1/2", 16")?

Thanks in Advance!
-Blue Chips-
Webb


Re: Four Jaw Chuck

Steven H
 

Yes, you will need a back plate adapter to mount this chuck on your lathe.

Steve Haskell


On Feb 27, 2021, at 9:33 AM, G K via groups.io <bug_hunter2000@...> wrote:


The add information:

Power Companion Tools four jaw 6 inch independent chuck, plain back. I have some backs ready for machining that you can use with this chuck if you need one. $00

<1614436296498blob.jpg>
<1614436334757blob.jpg>












On Saturday, February 27, 2021, 07:29:36 AM CST, Andrei <calciu1@...> wrote:


Why don't you post a link so we can see what you are talking about?

Typos are courtesy of autocorrect.


From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of G K via groups.io <bug_hunter2000@...>
Sent: Saturday, February 27, 2021 12:03:26 AM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: [SouthBendLathe] Four Jaw Chuck
 
Can you guys share your thoughts and comments on a "Power Companion Tools four-jaw, 6-inch independent chuck" as my first four jaw for a SB9C?  Can't find a lot of information on it.

Thanks to all!
<1614436296498blob.jpg>
<1614436334757blob.jpg>


Re: Four Jaw Chuck

G K
 

The add information:

Power Companion Tools four jaw 6 inch independent chuck, plain back. I have some backs ready for machining that you can use with this chuck if you need one. $00

Inline image
Inline image











On Saturday, February 27, 2021, 07:29:36 AM CST, Andrei <calciu1@...> wrote:


Why don't you post a link so we can see what you are talking about?

Typos are courtesy of autocorrect.


From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of G K via groups.io <bug_hunter2000@...>
Sent: Saturday, February 27, 2021 12:03:26 AM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: [SouthBendLathe] Four Jaw Chuck
 
Can you guys share your thoughts and comments on a "Power Companion Tools four-jaw, 6-inch independent chuck" as my first four jaw for a SB9C?  Can't find a lot of information on it.

Thanks to all!


Re: Four Jaw Chuck

G K
 

Mine's from ~1942.  Still in pieces.  Have not seen it work yet, but soon!

On Saturday, February 27, 2021, 07:53:09 AM CST, david pennington via groups.io <davidwpennington@...> wrote:


"Companion Power Tools" was a Sears brand. That may be a clue you can use.

I've a 9C from '46. What vintage is yours?

-------- Original message --------
From: "G K via groups.io" <bug_hunter2000@...>
Date: 2/26/21 22:03 (GMT-07:00)
To: SouthBendLathe@groups.io
Subject: [SouthBendLathe] Four Jaw Chuck

Can you guys share your thoughts and comments on a "Power Companion Tools four-jaw, 6-inch independent chuck" as my first four jaw for a SB9C?  Can't find a lot of information on it.

Thanks to all!


Re: Four Jaw Chuck

david pennington
 

"Companion Power Tools" was a Sears brand. That may be a clue you can use.

I've a 9C from '46. What vintage is yours?

-------- Original message --------
From: "G K via groups.io" <bug_hunter2000@...>
Date: 2/26/21 22:03 (GMT-07:00)
To: SouthBendLathe@groups.io
Subject: [SouthBendLathe] Four Jaw Chuck

Can you guys share your thoughts and comments on a "Power Companion Tools four-jaw, 6-inch independent chuck" as my first four jaw for a SB9C?  Can't find a lot of information on it.

Thanks to all!


Re: Four Jaw Chuck

Andrei
 

Why don't you post a link so we can see what you are talking about?

Typos are courtesy of autocorrect.


From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of G K via groups.io <bug_hunter2000@...>
Sent: Saturday, February 27, 2021 12:03:26 AM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: [SouthBendLathe] Four Jaw Chuck
 
Can you guys share your thoughts and comments on a "Power Companion Tools four-jaw, 6-inch independent chuck" as my first four jaw for a SB9C?  Can't find a lot of information on it.

Thanks to all!


Four Jaw Chuck

G K
 

Can you guys share your thoughts and comments on a "Power Companion Tools four-jaw, 6-inch independent chuck" as my first four jaw for a SB9C?  Can't find a lot of information on it.

Thanks to all!


Re: Looking For A Special Tap

sblatheman
 

3/8-10 NS LH.  National Special, (sharp Vee)

Ted

On Feb 26, 2021, at 7:15 PM, Steven H via groups.io <stevesmachining@...> wrote:

Perhaps your thread is a UTS thread. Here is link to the Wikipedia article: 
https://en.m.wikipedia.org/wiki/Unified_Thread_Standard

Steve Haskell


On Feb 26, 2021, at 6:28 PM, wlw19958 <wlw-19958@...> wrote:

Hi There, 

There is no question that the screw used to extend the finger
is not an ACME thread.  It isn't a worn ACME either.

<1325885334261.bmp>


When this part is threaded into the finger, there isn't any play (if it were a worn
ACME, there would be lots of play).  Here is a close-up.

<1325885334261.jpg>


What I see is, this thread form is a 60° but has a shallower depth.  I haven't measured
the depth yet.  From the formula in the HTRAL handbook, full depth 10 pitch thread
should be .064952" or .065" (rounding to the nearest thousandth).  This would give
a minor diameter of .245".

The pilot hole in the finger is about 19/64".  This is .297" (rounded).  This means the
tap doesn't have to be made to full thread depth and that should make it stronger.

Some have suggested substituting a 3/8-16 LH tap.  Some have done this when
fabricating parts for these telescoping steadies but if one uses a finer pitch, one
does not get the full range of finger movement and loose some capacity (either
loosing the ability to come all the way to center or not able to open all the way to
maximum for large diameter parts). 

The depth of the thread isn't completely known at this time.  The fingers were modified
to accept a replaceable tip and they were drilled all the way into the bottom of
the 3/8-10 LH threads.  Even though this has happened, I can estimate the original
depth to be about 1-7/8" to 2".  I have purchased some worn fingers that haven't
had any mods so I will be able to get a more accurate measurement once they have
arrived.   Once I know the correct depth, I can pass that on to the makers of the tap
so it can be made accordingly.

Anyway, I do appreciate the suggestions and help I've received so far.

Good Luck!
-Blue Chips-
Webb


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