Re: Leadscrews

2018-03-19 Thread Tim Krause 
Most of the metal lathes have a 10 or 20 tpi on the cross-slide. 

For the legacy, I would probably use a thread that is a multiplyer of the width 
of common sized bits that you are using.  All the legacy machines I have ever 
seen only use 5/8-4 tpi.  Anything else and it's been modified by some one.

Tim

On Mar 19, 2018, 1:09 AM, at 1:09 AM, Richard Ellis  
wrote:
>Hi Tim
>The Woodchuck did not have the 4TPI I think it was around 16 TPI and a 
>normal screw thread-nothing special.
>I would like a finer adjustment than the 4TPI. I will have a study of
>metal 
>work lathes. I have a Smart & Brown in my metal
>workshop.very 
>very accurate.
>I have had lots of different metal lathes the best of the lot was a VDF
>
>German made lathe, Had to leave it behind when I moved 
>house---too big and too heavy.
>I am self taught and just play about with machines ???
>Richard 
>
>On Sunday, March 18, 2018 at 6:42:22 PM UTC, Tim wrote:
>>
>> 5/8" 4tpi just like your woodchuck had.
>> On Mar 18, 2018, at 2:59 AM, Richard Ellis > > wrote:
>>>
>>> Further to my question Re: Y leadscrew for the Revo
>>> Roger have you any idea what thread Andy etc. used for the Revo Y
>axis.
>>>  I was just going to use a normal piece of theaded rod like that  on
>my 
>>> Woodchuck--- a bit primitive but it worked even if a little
>sloppy. 
>>> Back lash is the name of the game when using LOM's-- a built in 
>>> problem. !!!
>>> Richard
>>>
>>>
>
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Re: Leadscrews

2018-03-19 Thread Okla Mike (Liltwisted) 

I have 3 WoodChucks and they are all 5/8" 4-TPI and the Y-screw is the same.

Mike OK


On 3/19/2018 3:09 AM, Richard Ellis wrote:

Hi Tim
The Woodchuck did not have the 4TPI I think it was around 16 TPI and a 
normal screw thread-nothing special.
I would like a finer adjustment than the 4TPI. I will have a study of 
metal work lathes. I have a Smart & Brown in my metal 
workshop.very very accurate.
I have had lots of different metal lathes the best of the lot was a 
VDF German made lathe, Had to leave it behind when I moved 
house---too big and too heavy.

I am self taught and just play about with machines ???
Richard

On Sunday, March 18, 2018 at 6:42:22 PM UTC, Tim wrote:

5/8" 4tpi just like your woodchuck had.
On Mar 18, 2018, at 2:59 AM, Richard Ellis  wrote:

Further to my question Re: Y leadscrew for the Revo
Roger have you any idea what thread Andy etc. used for the
Revo Y axis.
 I was just going to use a normal piece of theaded rod like
that  on my Woodchuck--- a bit primitive but it worked
even if a little sloppy.
Back lash is the name of the game when using LOM's-- a
built in problem. !!!
Richard

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Re: Leadscrews

2018-03-19 Thread Richard Ellis 
Hi Tim
The Woodchuck did not have the 4TPI I think it was around 16 TPI and a 
normal screw thread-nothing special.
I would like a finer adjustment than the 4TPI. I will have a study of metal 
work lathes. I have a Smart & Brown in my metal workshop.very 
very accurate.
I have had lots of different metal lathes the best of the lot was a VDF 
German made lathe, Had to leave it behind when I moved 
house---too big and too heavy.
I am self taught and just play about with machines ???
Richard 

On Sunday, March 18, 2018 at 6:42:22 PM UTC, Tim wrote:
>
> 5/8" 4tpi just like your woodchuck had.
> On Mar 18, 2018, at 2:59 AM, Richard Ellis  > wrote:
>>
>> Further to my question Re: Y leadscrew for the Revo
>> Roger have you any idea what thread Andy etc. used for the Revo Y axis.
>>  I was just going to use a normal piece of theaded rod like that  on my 
>> Woodchuck--- a bit primitive but it worked even if a little sloppy. 
>> Back lash is the name of the game when using LOM's-- a built in 
>> problem. !!!
>> Richard
>>
>>

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