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
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
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..