Regrinding live centres

Home| Search | About
User Password
Register Now! Lost Password?

Model Engineering in UK - Model engineering, metal crafts in UK 

Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Regrinding live centres Tim Leech 05-20-2008
Posted by Richard Edwards on May 21, 2008, 4:34 am
Please log in for more thread options
 On Wed, 21 May 2008 08:34:35 +0100, Tim Leech

>On Wed, 21 May 2008 08:27:26 +0100, "David"
>
>>I was thinking of putting mine (after getting a new bearing for it, but my
>>center is a big and chunky one) in the headstock of the lathe, move my
>>compound slide to 30degrees, and use a toolpost grinder (like I just did
>>with my chuck jaws).
>>
>>Anything wrong with this? Is it a problem if the center free revolves
>>(whilst also revolving when the lathe is switched on)?
>
>My thinking was that the best result would be achieved with the body
>static and the centre revolving in its own bearings, any error then
>should be from the manufacture of the unit rather than the regrinding
>process. Others may have a different view.
>
>Cheers
>Tim
My sentiments exactly, that is why I did mine the way I did.

--

Richard

Email address is valid but remove burrs before sending!

Posted by Steve on May 23, 2008, 10:04 am
Please log in for more thread options
> On Wed, 21 May 2008 08:34:35 +0100, Tim Leech
>
>>On Wed, 21 May 2008 08:27:26 +0100, "David"
>>
>>>I was thinking of putting mine (after getting a new bearing for it, but
>>>my
>>>center is a big and chunky one) in the headstock of the lathe, move my
>>>compound slide to 30degrees, and use a toolpost grinder (like I just did
>>>with my chuck jaws).
>>>
>>>Anything wrong with this? Is it a problem if the center free revolves
>>>(whilst also revolving when the lathe is switched on)?
>>
>>My thinking was that the best result would be achieved with the body
>>static and the centre revolving in its own bearings, any error then
>>should be from the manufacture of the unit rather than the regrinding
>>process. Others may have a different view.
>>
>>Cheers
>>Tim
> My sentiments exactly, that is why I did mine the way I did.
>
> --
>
> Richard
>
> Email address is valid but remove burrs before sending!

I want a very small MT2 live centre and there is a design in Mr Sparey's
Lathe book. My thought was to get a stub arbor as the starter for ten then
machine to size and fit bearings. This is hobby use only and then
occasional. Is there any flaw in this approach?

Steve


Posted by Mark Rand on May 23, 2008, 2:33 pm
Please log in for more thread options
wrote:

>

>
>I want a very small MT2 live centre and there is a design in Mr Sparey's
>Lathe book. My thought was to get a stub arbor as the starter for ten then
>machine to size and fit bearings. This is hobby use only and then
>occasional. Is there any flaw in this approach?
>
>Steve


Why do you need to fit bearings to the live centre?

Just put the stub arbour in the headstock. Turn a 60 degree taper on it and
use it in the headstock without removing it. Instant live centre :-)

Next time you mount it in the headstock, turn another half thou off the taper
to clean it up and ensure concentricity. Works very well for me once I
discovered that no one seemed to be selling live centres any more.


Mark Rand
RTFM

Posted by Tim Leech on May 23, 2008, 2:52 pm
Please log in for more thread options
On Fri, 23 May 2008 19:33:52 +0100, Mark Rand

>wrote:
>
>>
>
>>
>>I want a very small MT2 live centre and there is a design in Mr Sparey's
>>Lathe book. My thought was to get a stub arbor as the starter for ten then
>>machine to size and fit bearings. This is hobby use only and then
>>occasional. Is there any flaw in this approach?
>>
>>Steve
>
>
>Why do you need to fit bearings to the live centre?
>
>Just put the stub arbour in the headstock. Turn a 60 degree taper on it and
>use it in the headstock without removing it. Instant live centre :-)
>
>Next time you mount it in the headstock, turn another half thou off the taper
>to clean it up and ensure concentricity. Works very well for me once I
>discovered that no one seemed to be selling live centres any more.
>
>
>Mark Rand
>RTFM


Mark

You're trying to confuse us by being pedantic and using 'proper'
terminology <BG>

Tim


Posted by David Littlewood on May 24, 2008, 7:16 am
Please log in for more thread options
>wrote:
>
>>
>
>>
>>I want a very small MT2 live centre and there is a design in Mr Sparey's
>>Lathe book. My thought was to get a stub arbor as the starter for ten then
>>machine to size and fit bearings. This is hobby use only and then
>>occasional. Is there any flaw in this approach?
>>
>>Steve
>
>
>Why do you need to fit bearings to the live centre?
>
>Just put the stub arbour in the headstock. Turn a 60 degree taper on it and
>use it in the headstock without removing it. Instant live centre :-)
>
>Next time you mount it in the headstock, turn another half thou off the taper
>to clean it up and ensure concentricity. Works very well for me once I
>discovered that no one seemed to be selling live centres any more.
>
Mark,

I may be missing some subtle point here, but there are plenty of live
centres around, e.g.

http://www.arceurotrade.co.uk/Catalogue/Centres

http://www.chronos.ltd.uk/acatalog/Chronos_Catalogue_Lathe_Taper_Tooling_
_70.html

The sets with interchangeable points may be a suitable solution for the
OP. Thought about getting one for myself a few times.

David
--
David Littlewood

Similar ThreadsPosted
Easier way of putting multiple centres in bar end March 7, 2008, 2:17 pm

Contact Us | Privacy Policy

XML SitemapXML Sitemap