The Boxford 260VMC as you probably never seen it before!

[rnr107]

Hi there, did you manage to source some new screws for your 260 or did make do with the old, i only ask as my Z spat its balls out and im using a old lead screw as a temporary measure, but will replace all with new machined screws if i can find a reasonable priced source...

Rick

Hi Ricardoco,
I found a company that makes 14mm ballscrew with a threaded nut but these were only rolled ballscrews not ground. But the original ballscrews on the VMC260 are rolled, so....
http://www.mooreinternational.co.uk/...6/FGI14X4.html

I keep my existing ballscrew for now, I can not detect much backlash so far, so should be OK untill I get enough money aaside to get some new ones...

An other option I found is a guy specialised in fixing damaged ballscrew. May worth a try?

http://cgi.ebay.co.uk/ws/eBayISAPI.d...:X:RTQ:GB:1123


RNR

[i2i]

wrong thread on the nut

[rnr107]

wrong thread on the nut

Hummm.... I wonder, It should not be too dificult to make a new nut holder (with the right thread)?
Looks like a fairly simple shape and made of aluminium...


RNR

[i2i]

is the original steel.??

[rnr107]

is the original steel.??

Nope... It is a kind of aluminium alloy...

This is probably a bit far fetched, but I wonder if it would be possible to machine a thread on one of the cheap ballnuts from china? The grade of steel is clearly hard, but it does file so it may be possible to machine.

Hi Jonathan,
You would do that on a Lathe I guess. So would you first remove all the balls ?

RNR

[Ricardoco]

Nope... It is a kind of aluminium alloy...




Hi Jonathan,
You would do that on a Lathe I guess. So would you first remove all the balls ?

RNR

Thanks for the link RNR, mine are steel and i would have opted for the repair but to be fair it really was fooked, i couldnt understand what was happening untill i had stripped everything down and by that time i had moved the Head up and down at least 20 times just to get it to go to the top so i could get the thing off... it was toast... i will replace all three with the threaded type like for like as i just dont have the time to mess around doing the other type with the machining..... I will let you know how i got on when its done but dont hold your breath as im building a gantry machine at the moment so it could be a while...

Rick