South Bend 9x32 lathe

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South Bend 9x32 lathe Jon Danniken 12-16-2009
Posted by axolotl on December 17, 2009, 7:15 pm
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On 12/17/2009 10:12 AM, RoyJ wrote:
> The page you mentioned:
> http://www.lathes.co.uk/southbend9-inch/
> has a babbit head with loose change gears and no power feed as the first
> picture.

Roy,

The "Workshop" series of lathes have hard steel spindles in cast iron
(the headstock itself) bearings. They last for decades.

Kevin Gallimore

Posted by Jon Danniken on December 18, 2009, 1:48 am
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axolotl wrote:
> On 12/17/2009 10:12 AM, RoyJ wrote:
>> The page you mentioned:
>> http://www.lathes.co.uk/southbend9-inch/
>> has a babbit head with loose change gears and no power feed as the
>> first picture.
>
> Roy,
>
> The "Workshop" series of lathes have hard steel spindles in cast iron
> (the headstock itself) bearings. They last for decades.

You mean there isn't a "real" bearing so much as it is just steel running on
cast iron? I'm pretty ignorant about metallurgy, and I apologize if I'm not
educated enough to notice sarcasm, but am I correct in thinking that is a
bad thing?

Jon



Posted by axolotl on December 18, 2009, 2:35 am
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On 12/18/2009 1:48 AM, Jon Danniken wrote:

> You mean there isn't a "real" bearing so much as it is just steel running on
> cast iron? I'm pretty ignorant about metallurgy, and I apologize if I'm not
> educated enough to notice sarcasm, but am I correct in thinking that is a
> bad thing?

It is a "real" bearing that works quite well at the low speeds at which
these lathes operate. The competition of the time (Atlas) used ball
bearings to avoid precision finishing and make the lathe cheaper to
manufacture. The 9" Workshop was sold for around 40 years, and may very
well be the most popular lathe on the planet.

Here is Mr. Wells repository of SB data:
http://www.wswells.com/index.html

Kevin Gallimore



Posted by Jon Danniken on December 18, 2009, 8:28 am
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axolotl wrote:
> On 12/18/2009 1:48 AM, Jon Danniken wrote:
>
>> You mean there isn't a "real" bearing so much as it is just steel
>> running on cast iron? I'm pretty ignorant about metallurgy, and I
>> apologize if I'm not educated enough to notice sarcasm, but am I
>> correct in thinking that is a bad thing?
>
> It is a "real" bearing that works quite well at the low speeds at
> which these lathes operate. The competition of the time (Atlas) used
> ball bearings to avoid precision finishing and make the lathe cheaper
> to manufacture. The 9" Workshop was sold for around 40 years, and may
> very well be the most popular lathe on the planet.
>
> Here is Mr. Wells repository of SB data:
> http://www.wswells.com/index.html

Okay, thanks, didn't know the longevity of that as a bearing surface.

Jon



Posted by Jim Wilkins on December 18, 2009, 7:15 am
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wrote:
>...
> You mean there isn't a "real" bearing so much as it is just steel running=
on
> cast iron? =A0I'm pretty ignorant about metallurgy, and I apologize if I'=
m not
> educated enough to notice sarcasm, =A0but am I correct in thinking that i=
s a
> bad thing?
>
> Jon

If designed correctly, the spindle pulls in and floats on a film of
oil:
http://en.wikipedia.org/wiki/Hydrodynamic_lubrication

Nearly a century of evidence says that South Bend got it right.

jsw

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