Re: [CAD_CAM_EDM_DRO] Re: How hard to rotate should preloaded ballnuts be, anyway? - UPDATE

----- Original Message -----
From: "Abby Katt" <cncgroupnospam2@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, April 19, 2007 4:06 PM
Subject: [CAD_CAM_EDM_DRO] Re: How hard to rotate should preloaded ballnuts
be, anyway? - UPDATE


> Thanks for all the help/advice guys:
> I'll do all the individual replies in one message to avoid spamming the
> group:
>
> Jon: Thanks for the advice regarding the grit - I did as you said, and
> it seemed to help a little. The grease coming out was pretty clean
> though, but had some few very tiny sparkling flakes.Not much really
> though, and rather clean. It feels like it's about over a kilogram to
> turn the ballnut when rotating the 50mm block - though in some places
> it'll go up to about 2-3. This is all guessed really, as I don't have
> any tools for checking this. Is this about norm? I suppose the machine
> was never meant to move like lightning..
>
> Ballendo: I've added the pics of the ballscrew to the page now
> (http://www.silverkatt.co.uk/Lathe/Default.aspx?Page=2), I think it may
> only be a single ballnut, but I could be wrong.. I sprayed a little WD40
> on the end-bearing support block and that turns OK now. It is becoming
> tempting to just open this thing up and clean all the balls. I know for
> a fact that this machine was never used to cut metal in it's lifetime -
> it only ever cut machinists wax by college students, so my guess is that
> the grease is all baked and crusty inside. When you actually roll it
> along you hear this slick-sucking-greasy sound, and at times there are
> moments where the torque needed to turn it is more.
>
> Mark: Thanks for the advice, am tempted to pull the ballnut open now..
>
> Regards,
> Abby
>
>
>
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