Date   

Re: Add to the map, DIY?

nzpropnut
 

If you can get Dennis Turk to add his couple (!), the total will crack 200 without any trouble!
Skilly
 

From: Lee
Sent: Tuesday, November 05, 2013 1:49 PM
Subject: Re: [southbendlathe] Add to the map, DIY?
 
 

Looks like you're closing in out the magic '200' (just 12 to go).

Is there any significance to the color of the pin?

Lee

At 01:32 AM 11/3/2013, you wrote:

https://www.zeemaps.com/South_Bend_Lathe_Owners_Map

166 members have their pins there!


Re: Add to the map, DIY?

Lee
 

Looks like you're closing in out the magic '200' (just 12 to go).

Is there any significance to the color of the pin?

Lee


At 01:32 AM 11/3/2013, you wrote:

https://www.zeemaps.com/South_Bend_Lathe_Owners_Map

166 members have their pins there!


Re: C to B 9" workshop conversion.

sblatheman
 

Machines for the military were usually made to the tight specs. I can't say if a 9" in 1952 was made to Govt. specs. Perhaps that information is on the serial card.

Ted

On Nov 3, 2013, at 10:33 PM, "Steve Wells" <wswells@...> wrote:

 



Ted could answer that, but I think Goverment would be the same, yes.
 
Steve
 
----- Original Message -----
Sent: Sunday, November 03, 2013 10:24 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 

On 11/3/2013 1:55 PM, Steve Wells wrote:
> 
>
> John, if you are referring to the apron lead screw, there were three
> specs: standard; tool room and military. the military spec being the best.

Would a 9" originally purchased by the corps of engineers in 1952 be
military spec?


Does anyone know "When"

phillip polk <pepolk@...>
 

Please advise as to when approximately South Bend began making knurled knobs for the double tumbler /and reverse levers. I assume the earlier ,Lionel train barrel looking knobs were replaced by knurled and was wondering when that happened.  
                                                                       Thanks Phil Polk


Re: C to B 9" workshop conversion.

Steve Wells
 


John, a lead screw is measured in moving and object a set distance compared to a know measurement.
Lets say we could move your cross feed 12 inches exactly by the dial, then compare the distance moved to a
12 in gauge block. the error in the lead screw is compared to the gauge or indicator, then stated as accuracies
in x inches, such as + or - .003 in 12 inches.
 
Steve
 

----- Original Message -----
From: john kling
Sent: Sunday, November 03, 2013 10:30 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 


With say a cylinder it easy for me to think of some simple measurement say with a dial gauge to determine accuracy.   How is accuracy specified for a lead screw? I am not a machinist but a statistician/ economist by training.

From: Gregg Eshelman <g_alan_e@...>
To: southbendlathe@...
Sent: Sunday, November 3, 2013 10:24 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 
On 11/3/2013 1:55 PM, Steve Wells wrote:
> 
>
> John, if you are referring to the apron lead screw, there were three
> specs: standard; tool room and military. the military spec being the best.

Would a 9" originally purchased by the corps of engineers in 1952 be
military spec?




Re: C to B 9" workshop conversion.

Steve Wells
 


Ted could answer that, but I think Goverment would be the same, yes.
 
Steve
 

----- Original Message -----
Sent: Sunday, November 03, 2013 10:24 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 

On 11/3/2013 1:55 PM, Steve Wells wrote:
> 
>
> John, if you are referring to the apron lead screw, there were three
> specs: standard; tool room and military. the military spec being the best.

Would a 9" originally purchased by the corps of engineers in 1952 be
military spec?


Re: C to B 9" workshop conversion.

john kling
 


With say a cylinder it easy for me to think of some simple measurement say with a dial gauge to determine accuracy.   How is accuracy specified for a lead screw? I am not a machinist but a statistician/ economist by training.


From: Gregg Eshelman
To: southbendlathe@...
Sent: Sunday, November 3, 2013 10:24 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 
On 11/3/2013 1:55 PM, Steve Wells wrote:
> 
>
> John, if you are referring to the apron lead screw, there were three
> specs: standard; tool room and military. the military spec being the best.

Would a 9" originally purchased by the corps of engineers in 1952 be
military spec?




Re: C to B 9" workshop conversion.

Gregg Eshelman
 

On 11/3/2013 2:06 PM, john kling wrote:



Thanks for the information. I am trying to approach this with my own
attempt of order. My first step is acquisition of the A and B apron. The
cross feed screws seem to be a bottleneck as well.
This guy makes new ones. http://www.millermachineandfabrication.com/products.html

The slide screws also differ depending on if the lathe has large or small dials. Yours should have the small dials, but there are upgrade kits to the large dials South Bend had starting in the later 1950's.

Yet another change around then was adding a small radial ball bearing on the cross slide screw so it'd turn smoother and wouldn't wear the end of the bushing.

Take some photos and measurements of your cross slide screw, send to Miller and say you want one like it with the power feed gear added.


Re: C to B 9" workshop conversion.

Gregg Eshelman
 

On 11/3/2013 1:55 PM, Steve Wells wrote:


John, if you are referring to the apron lead screw, there were three
specs: standard; tool room and military. the military spec being the best.
Would a 9" originally purchased by the corps of engineers in 1952 be military spec?


Re: 9A V BELT SIZE

sivan0123
 

I saw somewhere if is a  5L470 for the 16 speed v belt set up.


Is that correct



---In southbendlathe@..., <southbendlathe@...> wrote:

I have a horizontal 9a v belt and i need to know what size the belts are?
The belt from the pulley to the lathe is a b42 not sure what the belt is from the motor?


9A V BELT SIZE

sivan0123
 

I have a horizontal 9a v belt and i need to know what size the belts are?
The belt from the pulley to the lathe is a b42 not sure what the belt is from the motor?


Re: C to B 9" workshop conversion.

Steve Wells
 


The stack up height of the A/B apron for the cross feed was set with the apron cross feed gear they are marked M for minus and P for plus, a common line card listing would be M 10 for minus .010
The cross feed nut should wear first by design, but after many years the screw can wear in the center and you can expect to have to replace the nut and screw if backlash is over 10 to 20 K. I would replace the nut first and inspect the screw and if you can see sharp threads or measure wear, replace the screw threads. It's not difficult to do either and you refit everything and you will probably never do it again if it's oiled and maintained.
Steve Wells 

----- Original Message -----
From: john kling
Sent: Sunday, November 03, 2013 4:06 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 


Thanks for the information. I am trying to approach this with my own attempt of order. My first step is acquisition of the A and B apron. The cross feed screws seem to be a bottleneck as well. I have what I believe is a model 415 (single arm banjo and top oilers). I assume there is no additional problems here. When one has excess backlash (I do not have this problem) is the greater problem of wear normally found in the bronze "nut" or in the steel screw?

From: Steve Wells
To: southbendlathe@...
Sent: Sunday, November 3, 2013 3:55 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 

John, if you are referring to the apron lead screw, there were three specs: standard; tool room and military. the military spec being the best.
these were sorted as they were ran in production. If you are referring to the 7/16 LH acme for the cross feed, the normal (old way) was measurement over 3 wires to an SBL internal spec for back lash with the nut and or assembly. On a 7/16 acme you would use .05164 wires
and the internal spec was .451 +.000 and -.003. So .003 backlash was allowed.  The stock for the  screw on a non ground crossfeed was turned to .4375/.4370. on a ground screw, the turn was .4475/.4455 and then ground to .4375/.4370. South bend didn't use a standard Q9000
screw standard such as 4G or 5G (rub fit) the screw fell in-between those numbers but was listed on the control sheets as 4G.
A 3G screw if roll threaded will make it into the back lash specs just fine. My screw material is roll threaded 3G, and I'm almost out of stock, but I will soon be running the original South bend automatic screw machine that made these cross feed screws, I have the only one left from the factory thanks to Ted. and I have it running, but need to set up the collet for the blank stock and set the cutter blocks up, I have the finish tool block done, I need to do the rougher bit now. Just takes a lot of time...
 
Steve Wells
----- Original Message -----
From: john kling
Sent: Saturday, November 02, 2013 7:15 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 
Varying accuracy are claimed for different models of SB lathes lead screws. Also the different suppliers of  acme  stock makes assertions about high accuracy. What is involved and how is accuracy  measured for threads?
I guess I am asking for some one to put on a pedogogue's hat.


From: "armne@..." <armne@...>
To: "southbendlathe@..."
Sent: Saturday, November 2, 2013 1:27 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 
  Thank you Jim,
  I have cut acme threads to fit a worm amce cast iron nut on my tail stock.
Alec Ryals


From: Jim B.
To: southbendlathe@...
Sent: Saturday, November 2, 2013 8:41 AM
Subject: RE: [southbendlathe] Re: C to B 9" workshop conversion. [2 Attachments]

 
Steve Wells has some very special, accurate and polished 7/16-10 LH stock for rebuilding cross feeds.
The compound is 3/8-10 RH
You can find accurate stock for that here.
 
http://www.roton.com/
 
MSC also carries some stock but they are expensive.
Here is some leadscrew rod.
 
http://www.mscdirect.com/product/01206184
 
Of course you can roll your own. You only need some rod and to grind an ACME threading tool.
I have made some for my Burke Mill in/out feed and its been good for 5 years now.
This also gives you the ability to “fit” the thread to a worn nut.
 
Jim B.

.
 
 
Were do I buy accurate amce thread stock.
Thank You
Alec








Re: C to B 9" workshop conversion.

john kling
 


Thanks for the information. I am trying to approach this with my own attempt of order. My first step is acquisition of the A and B apron. The cross feed screws seem to be a bottleneck as well. I have what I believe is a model 415 (single arm banjo and top oilers). I assume there is no additional problems here. When one has excess backlash (I do not have this problem) is the greater problem of wear normally found in the bronze "nut" or in the steel screw?


From: Steve Wells
To: southbendlathe@...
Sent: Sunday, November 3, 2013 3:55 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 

John, if you are referring to the apron lead screw, there were three specs: standard; tool room and military. the military spec being the best.
these were sorted as they were ran in production. If you are referring to the 7/16 LH acme for the cross feed, the normal (old way) was measurement over 3 wires to an SBL internal spec for back lash with the nut and or assembly. On a 7/16 acme you would use .05164 wires
and the internal spec was .451 +.000 and -.003. So .003 backlash was allowed.  The stock for the  screw on a non ground crossfeed was turned to .4375/.4370. on a ground screw, the turn was .4475/.4455 and then ground to .4375/.4370. South bend didn't use a standard Q9000
screw standard such as 4G or 5G (rub fit) the screw fell in-between those numbers but was listed on the control sheets as 4G.
A 3G screw if roll threaded will make it into the back lash specs just fine. My screw material is roll threaded 3G, and I'm almost out of stock, but I will soon be running the original South bend automatic screw machine that made these cross feed screws, I have the only one left from the factory thanks to Ted. and I have it running, but need to set up the collet for the blank stock and set the cutter blocks up, I have the finish tool block done, I need to do the rougher bit now. Just takes a lot of time...
 
Steve Wells
----- Original Message -----
From: john kling
Sent: Saturday, November 02, 2013 7:15 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 
Varying accuracy are claimed for different models of SB lathes lead screws. Also the different suppliers of  acme  stock makes assertions about high accuracy. What is involved and how is accuracy  measured for threads?
I guess I am asking for some one to put on a pedogogue's hat.


From: "armne@..." <armne@...>
To: "southbendlathe@..."
Sent: Saturday, November 2, 2013 1:27 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 
  Thank you Jim,
  I have cut acme threads to fit a worm amce cast iron nut on my tail stock.
Alec Ryals


From: Jim B.
To: southbendlathe@...
Sent: Saturday, November 2, 2013 8:41 AM
Subject: RE: [southbendlathe] Re: C to B 9" workshop conversion. [2 Attachments]

 
Steve Wells has some very special, accurate and polished 7/16-10 LH stock for rebuilding cross feeds.
The compound is 3/8-10 RH
You can find accurate stock for that here.
 
http://www.roton.com/
 
MSC also carries some stock but they are expensive.
Here is some leadscrew rod.
 
http://www.mscdirect.com/product/01206184
 
Of course you can roll your own. You only need some rod and to grind an ACME threading tool.
I have made some for my Burke Mill in/out feed and its been good for 5 years now.
This also gives you the ability to “fit” the thread to a worn nut.
 
Jim B.

.
 
 
Were do I buy accurate amce thread stock.
Thank You
Alec








Re: C to B 9" workshop conversion.

Steve Wells
 


John, if you are referring to the apron lead screw, there were three specs: standard; tool room and military. the military spec being the best.
these were sorted as they were ran in production. If you are referring to the 7/16 LH acme for the cross feed, the normal (old way) was measurement over 3 wires to an SBL internal spec for back lash with the nut and or assembly. On a 7/16 acme you would use .05164 wires
and the internal spec was .451 +.000 and -.003. So .003 backlash was allowed.  The stock for the  screw on a non ground crossfeed was turned to .4375/.4370. on a ground screw, the turn was .4475/.4455 and then ground to .4375/.4370. South bend didn't use a standard Q9000
screw standard such as 4G or 5G (rub fit) the screw fell in-between those numbers but was listed on the control sheets as 4G.
A 3G screw if roll threaded will make it into the back lash specs just fine. My screw material is roll threaded 3G, and I'm almost out of stock, but I will soon be running the original South bend automatic screw machine that made these cross feed screws, I have the only one left from the factory thanks to Ted. and I have it running, but need to set up the collet for the blank stock and set the cutter blocks up, I have the finish tool block done, I need to do the rougher bit now. Just takes a lot of time...
 
Steve Wells

----- Original Message -----
From: john kling
Sent: Saturday, November 02, 2013 7:15 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 

Varying accuracy are claimed for different models of SB lathes lead screws. Also the different suppliers of  acme  stock makes assertions about high accuracy. What is involved and how is accuracy  measured for threads?
I guess I am asking for some one to put on a pedogogue's hat.


From: "armne@..." <armne@...>
To: "southbendlathe@..."
Sent: Saturday, November 2, 2013 1:27 PM
Subject: Re: [southbendlathe] Re: C to B 9" workshop conversion.

 
  Thank you Jim,
  I have cut acme threads to fit a worm amce cast iron nut on my tail stock.
Alec Ryals


From: Jim B.
To: southbendlathe@...
Sent: Saturday, November 2, 2013 8:41 AM
Subject: RE: [southbendlathe] Re: C to B 9" workshop conversion. [2 Attachments]

 
Steve Wells has some very special, accurate and polished 7/16-10 LH stock for rebuilding cross feeds.
The compound is 3/8-10 RH
You can find accurate stock for that here.
 
http://www.roton.com/
 
MSC also carries some stock but they are expensive.
Here is some leadscrew rod.
 
http://www.mscdirect.com/product/01206184
 
Of course you can roll your own. You only need some rod and to grind an ACME threading tool.
I have made some for my Burke Mill in/out feed and its been good for 5 years now.
This also gives you the ability to “fit” the thread to a worn nut.
 
Jim B.

.
 
 
Were do I buy accurate amce thread stock.
Thank You
Alec






Re: Where are you located?

Jim B. <btdtrf@...>
 

We have a new member and his pin would look nice.

 

Comment from user:

Principal Bibi fathima College Bangalore I have two lathes and a 7&quot;shaping machine

 

 

Jim B.



Re: Add to the map, DIY?

Flash Gordon
 

On the map if you switch to satellite view and zoom in on the yellow marker I put at South Bend Indiana; you can see the site of the original South Bend Works.

https://www.zeemaps.com/South_Bend_Lathe_Owners_Map

166 members have their pins there!

Ed S


Re: Do a 14.5" and a 16" use the same bed?

Gregg Eshelman
 

On 11/2/2013 10:55 PM, Paolo Amedeo wrote:


I'm pretty sure that they're very similar, but not identical. The 16"
bed should be a tad wider.
I think a friend of mine has still a brand-new 8' bed for a 14.5" lathe
(the bed was bought by Kodak Eastman to use it as optical bench). If
would cost less than a re-grinding job. PM if interested and I'll put
you in contact with him.
Yup. He has it on eBay. I know someone with a 16/24 with a bed worn so much it has like a raised ridge on top of the V ways for at least 1/3 of the length.


Re: Do a 14.5" and a 16" use the same bed?

Paolo Amedeo
 

I'm pretty sure that they're very similar, but not identical. The 16" bed should be a tad wider.
I think a friend of mine has still a brand-new 8' bed for a 14.5" lathe (the bed was bought by Kodak Eastman to use it as optical bench). If would cost less than a re-grinding job. PM if interested and I'll put you in contact with him.

Paolo
Damascus, MD

On 11/03/2013 12:47 AM, Gregg Eshelman wrote:
 

Do a 14.5" and a 16", both under drive type, use the same bed?







Do a 14.5" and a 16" use the same bed?

Gregg Eshelman
 

Do a 14.5" and a 16", both under drive type, use the same bed?


Re: Pre-workshop 9" with chain drive on eBay

Flash Gordon
 

Yikes, the legs are missing........ with that short a bed, it will tip over to the left , real easy. I know I have a 380Y with the legs and QCGB.

If that is the correct tail stock, I think that is a 9" wide bed. And I do not see any change gears.

Ed S

At 12:32 AM 11/3/2013, you wrote:
Has power feed but no gearbox. http://www.ebay.com/itm/171156656620

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