RE:Re: Re: no thrust bearing - simple design ?

go to the SKF website http://skf.com find the bearings and thier
catalog lists max speed for grease and oil


--- In CAD_CAM_EDM_DRO@yahoogroups.com, Hoyt McKagen <bjammin@i...>
wrote:

> At 10:17 AM 4/20/03 -0700, you wrote:
> >A long thin screw behave somewhat like a string on a musical

instrument. It

> >is made stiffer by tension.
>
> Actually, no. The material characteristics aren't affected at all by
> preload. IOW, deflection of a member under an increment of load is

always

> the same throughout the elastic range, no matter what preload is

applied.

>
> >'m almost certain that the whipping modes
> >would move to a higher speed if the screw was tensioned.
>
> That may be true but it isn't the same thing.
>
> >On the subject of bearings, does anyone know how fast plain

bearings can be

> >run?
>
> The catalogs always give a load reating at a given max RPM.
>
> Regards, Hoyt McKagen
>
>
> Anti-virus request: Please do not add this email addy to address

books

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