[hoss2006]

[ame="http://www.youtube.com/watch?v=FyaZGvcrCB0"]YouTube- G0704 Manual Auto Drawbar[/ame]



On the way home from work Friday, this idea came to me.
It seemed a simple and cheap solution for manual mills in my noggin
so I bodged it together and it works.
If I was going to keep the mill manual, I'd make a better crossbar that pivots,
would allow for drawbar removal, a tad more quill travel and keep the drawbar from rubbing.
It's for "Light Duty", well as "light" as my X2 can handle anyway. Read # 16
If you want to use stiffer bellevilles, you better bolt the machine down.
I could manage to compress the ones I used (left over from the X2)
with just forearm strength, about 750 lbs at the drawbar.
Works as quick and easy as the Mach 1 system but not as much $$$.
Should work just as well on X3's, RF45's or any other mill with a quill.
I was worried the quill handle might break but it seems more stout than I thought.
If I went with higher spring pressure, I'd replace the handle I'd use with a solid steel one.
I wouldn't be worried about trying to get too much more though, I know what Can be done on my Freak with these springs.
Hoss

[Kipper]

YouTube- G0704 Manual Auto Drawbar



On the way home from work Friday, this idea came to me.
It seemed a simple and cheap solution for manual mills in my noggin
so I bodged it together and it works.
If I was going to keep the mill manual, I'd make a better crossbar that pivots,
would allow for drawbar removal, a tad more quill travel and keep the drawbar from rubbing.
It's for "Light Duty", well as "light" as my X2 can handle anyway. Read # 16
If you want to use stiffer bellevilles, you better bolt the machine down.
I could manage to compress the ones I used (left over from the X2)
with just forearm strength, about 750 lbs at the drawbar.
Works as quick and easy as the Mach 1 system but not as much $$$.
Should work just as well on X3's, RF45's or any other mill with a quill.
I was worried the quill handle might break but it seems more stout than I thought.
If I went with higher spring pressure, I'd replace the handle I'd use with a solid steel one.
I wouldn't be worried about trying to get too much more though, I know what Can be done on my Freak with these springs.
Hoss

Didn't you carry the RF45? Ordinary folk can use a 24" tube as a lever eh

[hoss2006]

You'll just have to put a little more a*s into it.
Hoss

[vcatalasan]

I just saw this after quite a bit of searching on spring loaded drawbar. Not really into fully automatic drawbar but would rather not use the hammer for every tool change.

I have an X2 so no quill movement. However I can probably rig a lever arm on top of the head assembly to compress the spring to release the tool. The lever will not be engage, only during tool change. I am using the TTS system but I have no clue about what spring tension is needed. What is the optimum force needed to pull the drawbar for collet tension?

Thanks,

[hoss2006]

You can find links to the bellevilles I used for this and the x2 drawbar.
Projects 7
they provide about 700 lbs holding force.
Hoss

[vcatalasan]

Hoss, thanks for the info, I got the springs on order.