die grinders vs dremel/rotozip .. was: Linear rail & ball screw size suggestions

dave_ace_me wrote:

>
> I went to Sears.com and the part number [315.267440] didn't come up.
>
> Searching for 'grinder' this part did. is this the same unit ?
>
> 00902744000 Part number in case the link is too long.

http://www.sears.com/sr/product/summary/productsummary.jsp?BV_SessionID=@@@@1572787932.1018622732@@@@&BV_EngineID=ccgjadcelimihimcehgcemgdffmdfin.0&vertical=SEARS&pid=00902744000&bidsite=&vertical=SEARS&com.broadvision.session.new=Yes

Yes thats it.

Batwings wrote:

>The one I have started making loud buzzing sounds about 10 hours into my
>ownership. I traced this to a bad bearing mount on the working end. They
>mount the bearing there in a rubber block. This hardens and wears or
>deforms til there is slop at the bearing OD. The result is not
>satisfactory. I would not reco this unit to anyone. YMMV.

I think you got a bum unit. I have two and both give long service.
Maybe you should try replacing the rubber block with a new one, or
maybe replacing it with a metal insert.

Doug Fortune
http://www.cncKITS.com NEW-> 1KW power supply kits