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.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.Â* I was able to get the ball screw out of the new bearings
without pulling the bearings apart.Â* I unbolted everything from the
machine and took it out as an assembly.Â* 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.Â* 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.