SouthBend 9 Model A (NAR10) – Instruction Manual

[Steve MParticipant @stevem]

Hi Chaps,

Hope everyone is well.

I've just treated myself to a new used lathe which is the SouthBend 9 Model A (NAR10) post 1945 model.

I was wondering if anyone had an instruction manual for the lathe they could either email me or send me the link to. I've had a quick look on google but can't find anything.

It's the long bed version with the quick change gear box.

Thanks

Steve

[Steve MParticipant @stevem]

[Clive Brown 1Participant @clivebrown1]

Is your particular lathe the model from which the 9" Boxford is cloned?

If so, the Boxford handbook "Know your Lathe" might help. here

[Jeff DaymanParticipant @jeffdayman43397]

I also have a SB 9" lathe built in 1949. I would recommend the book "how to run a lathe" published for many years by South Bend themselves. You can find hard copies on different auction sites but there are also various sites that have accessible PDF files for you to read it. This book is generic to all sizes of SB lathe , not specifically the 9" but the essential info is all there.

One such PDF is at the link below.

http://vintagemachinery.org/pubs/1617/5795.pdf

[Thor 🇳🇴Participant @thor]

There is a Parts List here, this document is from US Army and covers both 9 and 10 lathes.

Thor

[Steve MParticipant @stevem]

Posted by Clive Brown 1 on 03/03/2021 15:33:49:

Is your particular lathe the model from which the 9" Boxford is cloned?

If so, the Boxford handbook "Know your Lathe" might help. here

thanks a lot.

[Steve MParticipant @stevem]

Posted by Clive Brown 1 on 03/03/2021 15:33:49:

Is your particular lathe the model from which the 9" Boxford is cloned?

If so, the Boxford handbook "Know your Lathe" might help. here

thanks a lot.

[Steve MParticipant @stevem]

Posted by Thor on 03/03/2021 16:52:38:

There is a Parts List here, this document is from US Army and covers both 9 and 10 lathes.

Thor

thanks

[Steve MParticipant @stevem]

Posted by Jeff Dayman on 03/03/2021 16:01:48:

I also have a SB 9" lathe built in 1949. I would recommend the book "how to run a lathe" published for many years by South Bend themselves. You can find hard copies on different auction sites but there are also various sites that have accessible PDF files for you to read it. This book is generic to all sizes of SB lathe , not specifically the 9" but the essential info is all there.

One such PDF is at the link below.

http://vintagemachinery.org/pubs/1617/5795.pdf

thanks. do you happen to know if Boxford chucks would fit onto the lathe?

[Jeff DaymanParticipant @jeffdayman43397]

No, I am not sure if a Boxford chuck will fit 9" SB spindle. FYI for checking, The 9" SB spindle is threaded 1 1/2" -8 UN, the register diameter is 1.509". end of spindle to flange/stop is 7/8", end of spindle to end of thread is 11/16".

Edited By Jeff Dayman on 04/03/2021 09:51:33

[OldironParticipant @oldiron]

The Boxford chuck back plate will tighten up before it settles onto the spindle spigot unless either part has a badly worn thread. "been there done that" It is the difference between 55Deg & 60Deg thread.

regards

 

edit for missing word

Edited By Oldiron on 04/03/2021 10:04:51

Edited By Oldiron on 04/03/2021 10:16:55

[Steve MParticipant @stevem]

Hi, sorry one more question. Would the spindle thread size be the the same as on a 1940's SB 9 C as a 1945 SB 9 A ?

Thanks.

Steve

[HopperParticipant @hopper]

Posted by Steve M on 05/03/2021 10:34:08:

Hi, sorry one more question. Would the spindle thread size be the the same as on a 1940's SB 9 C as a 1945 SB 9 A ?

 

Thanks.

 

Steve

 

The best source for those kind of very specific queries is probably the Practical Machinist forum's South Bend sub-forum here **LINK**

Plenty of South Bend experts there, being a US forum South Bends are as common as Myfords are in the UK so the collective knowledge is expansive.

And you may be able, in a pinch, to "convert" a Boxford chuck to fit a South Bend by running a South Bend UNF profile tap down the Boxford BSW profile thread. Such taps are available from Tracy Tools etc.

Edited By Hopper on 05/03/2021 10:42:37

[Steve MParticipant @stevem]

Posted by Hopper on 05/03/2021 10:40:26:

Posted by Steve M on 05/03/2021 10:34:08:

Hi, sorry one more question. Would the spindle thread size be the the same as on a 1940's SB 9 C as a 1945 SB 9 A ?

Thanks.

Steve

Thanks a lot. I've put a post in that Forum

The best source for those kind of very specific queries is probably the Practical Machinist forum's South Bend sub-forum here **LINK**

Plenty of South Bend experts there, being a US forum South Bends are as common as Myfords are in the UK so the collective knowledge is expansive.

And you may be able, in a pinch, to "convert" a Boxford chuck to fit a South Bend by running a South Bend UNF profile tap down the Boxford BSW profile thread. Such taps are available from Tracy Tools etc.

Edited By Hopper on 05/03/2021 10:42:37

[John HinkleyParticipant @johnhinkley26699]

Steve M,

Have you looked on Keith Rucker's site for publications? If not, Try here.

There are 291 pdf files concerning South Bend machines. I don't know which yours is, specifically – I can't find a reference to a NAR-10 model, but I assume you have a screw-cutting gearbox and power cross-feed? Possible publications are there but might require a bit of searching.

John

[Jeff DaymanParticipant @jeffdayman43397]

Error in thread post stating it may be possible to run a UNF tap down a BSW chuck –

1 1/2"-8 thread as used on 9" SB is an 8 series UN thread, but NOT a UNC or UNF thread.

UNF 1 1/2" thread has 12 TPI, UNC 1 1/2" thread has 6 TPI. If you run either UNF or UNC taps into a chuck it may ruin it for use on a SB 9" lathe. I am not sure if using a 1 1/2"-8 UN tap would leave enough metal or fit the BSW thread in such a chuck.

There are plenty of Chinese made chucks on the market that are not top quality but are perfectly serviceable and quite cheap, maybe less than the cost of taps as discussed above, and they will fit right out of the box. Years ago I bought a cheap Chinese 4 jaw chuck and it has given excellent service. Fitted right out of the box. The worst part of it was getting the brown sticky cosmoline anti-corrosion coating off it – seriously nasty stuff to remove!

As far as I know all SB 9" lathes ever made use 1 1/2"-8 UN thread on the spindles.

[BazyleParticipant @bazyle]

The thing to note is that the Boxford nose is Whitworth thread so a SB backplate does not fit a Boxford, but the other way round is unsatisfactorily possible. Be aware of this as garage trader advertisers on ebay may select a description at random not understanding the difference and its improtance.

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