loading ballscrew nut

[russell]

Hi guys

back again with another dilema I recently salvaged a ballscrew and nut
but to get the thing out I had to remove the nut from the screw and I was wondering if anybody knows how to load it back on properly
they are inturnal tubes So I can't just take the tubes off and do it
the diameter of the nut is 2.5" so I was thinking I could maybe bring a cardboard sleve slowy up from the bottom loading each thread and then just thread it on the screw
I looked into having it done for me but I was told it would be around $700.00 or $800.00
thats a big bite into my cnc buget
the new bearings for this thing are about $25.00 what am I missing?
as before any and all help would be greatly appeciated
Russell

[DennisCNC]

Put a close up picture on the nut on here so we can take a look at it.

[russell]

here are a couple of pictures of it
there are no markings or brand name on it

[DennisCNC]

Drink like ten bottles of the stuff you have it the background and then work the magic

I'll do some research to try to help some how.

[DennisCNC]

What if you grease all the balls and the inside of the nut and put all the balls in the nut and then find a plastic tube or roll up a tube from firm paper to help hold the balls in place and start screwing the screw in little by little. Or put magnets around the outside on the nut to hold the balls in place.

[miljnor]

try this link

http://www.cnczone.com/forums/showth...ight=ball+nuts

[sendkeys]

if you can’t load if via the return tubes. Maybe try to fine some plastic or metal tube the same size as the smallest id of the ballscrew.
Drill looks like 2 holes(size of the balls) at each end at a angle (in the middle of the the return tubes).
Load a many balls with grease into the nut as you can then slide the plastic in.
Load all the other balls via the inside holes you drilled.
Then screw the nut onto the screw and push the other tube out.
Never tried it this way but sounds like it would work.

goodluck

[ibarra]

We use teflon cylinders 0,2mm smoller than the root diameter of the screw.
Then you introduce it in the nut and in the top of the cylinder you put the balls carefully, starting in the down side of the nut and finishing in the top.
When you finish use the cylinder like a screw putting it in one side of the thread (you can use a hollow cylinder to get to he thread)
I am sorry because of my english but i am trying to help...

[sendkeys]

Your english is fine ibarr, I know what you're saying. Just load them in row by row. Pushing the Cylinder up each row you load Sounds like the best way to do it. Just dont forget to load the return tubes
thanks ibarra

[ibarra]

and it is very well explained in www.ipirangahusillos.com you can visit it,
The metod that it explains can be done better but i think that is very good.

[CNCezee]

Hi Guys,

I too had a misshap with a ball nut and atempted to use grease to hold the balls in place, it did work but made a real mess, on advice from a frend to use a strong magnet i cleaned out all of the grease placed the nut into a strong electromagnet and loaded the balls eazeee no grease no mess nothing fell out.
as a second point.

I too am building a flat bed router and loading it onto my web site, so if you want a look go to www.foundry-fopars.co.uk

i would be very pleased to hear some comments

CNCEzee

[ibarra]

you must be carefull with the magnets. If the nut become into a magnet the all the steel turnings will be gum up to he internal screw of the nut, and the
live of the ballscrew will be too much short...
I think that is better to use the teflon o plastic cylinder...