[ATM] Threading

[don clement]

Hardinge HLV and Monarch 10 EE lathes used to be on my wish list. Not any more. Even though both lathes are ultra-precision  tool room lathes they are still manual lathes and repetitive operations such as threading have to be done by hand. Using a manual lathe even for a small production runs makes one feels too much like Fritz Lang's  Freder. http://i72.photobucket.com/albums/i163/miltons_stuff/frederClock.jpg 

 I am considering the Haas TL1 CNC lathe.  
 http://i72.photobucket.com/albums/i163/miltons_stuff/HassTL-1_lg.jpg 

 But for now most of my threading is done on my small CNC mill using thread milling technique. Here is an example of thread milling an internal M102-1mm pitch thread on my CNC mill. Notice thread milling is done  quickly with only a single pass. Compare doing this on a manual lathe. 

Don Clement
Running Springs, California 


--- On Wed, 9/30/09, Jay LeBlanc <jaleblan at dakotacom.net> wrote:

> From: Jay LeBlanc <jaleblan at dakotacom.net>
> Subject: Re: [ATM] Threading
> To: atm at atmlist.net
> Date: Wednesday, September 30, 2009, 5:57 PM
> James P Crombie wrote:
> >  I guess I will not mention being able to thread
> 1/4-40 parts at 1000 rpm on a Hardinge tool room lathe. :-)
> > I miss that lathe :-(  It has an auto disengage
> at the end of the thread and and lever operated top slide to
> disengage the tool without moving the cross slide.
> 
> Well, the 9x20 Harbor Freight is so wonderfully crude it is
> amazing it works,
> the Hardinge machinery are built like jewels.
> 
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