On Tue, 23 Jan 2018 11:41:25 -0700, Bob La Londe
wrote:

On 1/23/2018 2:21 AM, Gunner Asch wrote:
On Mon, 22 Jan 2018 14:07:08 -0700, Bob La Londe
wrote:

On 1/18/2018 7:19 PM, Bob La Londe wrote:
On 1/15/2018 11:28 AM, Bob La Londe wrote:
On 1/15/2018 10:58 AM, Gunner Asch wrote:
On Mon, 15 Jan 2018 09:50:51 -0800, Gunner Asch
wrote:

On Mon, 15 Jan 2018 10:35:29 -0700, Bob La Londe
wrote:


Dont dispair quite yet...ballscrews can..can be found cheaply enough
both on Ebay and other locations.


http://www.practicalmachinist.com/vb...screws-232777/



https://www.ebay.com/sch/i.html?_fro...ews&_sacat =0



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Yep.* Lots of options.* I'll look at some of the sources on the PM
thread with more care in a bit.


Rexroth Bosch are some of the best ballscrews out there. They are
commonly found in high end machine tools.* OmniTurn uses them as well

https://www.ebay.com/sch/i.html?_odk...xroth&_sacat=0


I have a few used ones collecting dust..most will have about .0007"
endplay..* Id be happy to send you one or two..what size do you
need..plus length?

Gunner


Oh..dont forget proper thrust bearings as well.* This is the sort I
most commonly use:

https://www.ebay.com/itm/FK15-Fixed-...QAAOSwZB9aRPYK


https://www.ebay.com/sch/i.html?_odk...aring&_sacat=0



I'll post some info when I have time to pull that part of the machine
apart again.* Right now I have to get some jobs on the little machines
and keep them going.* Might not be until tonight or tomorrow when I
some have time to disassemble.




Basic Dimensions:
http://www.cncmoldsnstuff.com/ballsc...118_183807.jpg

More Pictures:
http://www.cncmoldsnstuff.com/ballscrew

Good news.* I was able to get the ball screw out of the new bearings
without pulling the bearings apart.* I unbolted everything from the
machine and took it out as an assembly.* Without everything in a bind it
came apart modestly easily.

If something wonderful doesn't present itself I'll have a go at turning
the end of the shaft down and using a bushing or bushings to bring it
back up to spec.* Obviously I'd have to change threads and nuts, but
that's not a huge problem I suspect.




Nothing Huh? Ok, well I need the machine working. I can get a decent
price on a metric screw with oversized balls new from Automation
Overstock. (about 7 tenths backlash) I'll just go that way and make an
adapter, because I need to get the machine going pretty quickly. its
been down for three weeks, and while it doesn't do the bulk of my work
its made me realize how much I do use it. There are somethings that are
easier to do with horsepower than with high speed and feed.


I thought you "fixed it" so I didnt go any farther.

btw.. .0007 backlash is the point I replace em because they are worn
out. If thats what you are getting from NEW or rebuilt
ballscrews....blink blink..


Well in the years we have interacted on-line this is the fifth time you
haven't followed through on something you said you would do for me. The
first time I think was before your stroke so call it 4 times. One in
theory you might still be following thru on so still 3 times. As to the
tolerance... well... if you had something better I could afford and
followed through I'd have bought it. But go ahead and blink feigning
astonishment and superiority. It doesn't matter to me how superior you
think you are in everything you are or do or have. Does me no good
without follow through. I just need to get my job done. With or
without you.

Superiority? About what?

I have seen others post about how you did something or sent them
something so I just figured you didn't like me, and didn't mind wasting
my time.

Blink blink...huh?

You do know the original claim of tolerance for this machine in the
manual is only .003, although its always produced better than .001 for
me. Its got a decent screw, but its still only a single nut ball nut.

So, why in the heck do you think I posted dimensions and images at your
request if I had it all fixed. --- Note the lack of a question
mark. That's on purpose.

Have a good life. I have work to do.


Dimensions? Images? Where.
"
Good news.* I was able to get the ball screw out of the new bearings
without pulling the bearings apart.* I unbolted everything from the
machine and took it out as an assembly.* Without everything in a bind it
came apart modestly easily.

If something wonderful doesn't present itself I'll have a go at turning
the end of the shaft down and using a bushing or bushings to bring it
back up to spec.* Obviously I'd have to change threads and nuts, but
that's not a huge problem I suspect."

You lost me somewhere....I thought you fixed it.

Gunner