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Bob La Londe[_7_] Bob La Londe[_7_] is offline
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Default Can't Win Some Days

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.Â* Lots of options.Â* 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.Â* 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..Â* 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.Â* 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.Â* Right now I have to get some jobs on the little machines
and keep them going.Â* 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.