Thanks to Bogs I now know whan a backstop does and how it works AND I WANT ONE
I dont have any morse taper blanks and my topslide travel is to short to make one without a lot of luck involved.
The other way mentioned looked like I would be able to manage
So I need a expanding collet that fits the wrong end of the headstock spindle.
25mm MS + lathe +
![](http://i608.photobucket.com/albums/tt161/geroli/DS4.jpg)
+Slitting saw
![](http://i608.photobucket.com/albums/tt161/geroli/DS5.jpg)
=
![](http://i608.photobucket.com/albums/tt161/geroli/DS6.jpg)
This has a 12.5mm bore right through and a low angle taper at one end
Then the Tapered locking bolt needs a Outer thread 12mm *1mm pitch and a inner 8m thread
![](http://i608.photobucket.com/albums/tt161/geroli/DS7.jpg)
And ready for parting ( taking it out to the garagde and cutting it with the hacksaw) Parting noise wakes kids
![](http://i608.photobucket.com/albums/tt161/geroli/DS8.jpg)
The setup on a piece of 8m studding just needs a 12mm *1mm closing nut and some accesories - like delrin spacer to keep it from rattling and maybe a flat end for the material to rest on.
![](http://i608.photobucket.com/albums/tt161/geroli/DS9.jpg)
Enough for tonight
Hopefull more tomorrow
Gerhard