Re: [CAD_CAM_EDM_DRO] lubricants was Re: Re: spindle motors

Doug Harrison wrote:

> What about Marvel Air Tool oil? It works in 30K rpm die grinders. Just a
> thought.
>
> The bearing literature I've read says to use lighter oils for higher speeds
> and less of it. Two stroke motorcycle crank bearings run with just a dilute
> mist of oil that enters with the fuel. Tuners have experimented with sealed
> bearings only to find they were short-lived.
>
> Perhaps the poor man's solution is to borrow the mist concept from the
> motorcycle. Feed the bearings with mist-laden air from a line lubricator
> such as those used for pneumatic equipment. One or two CFM at 50psi should
> do it. Of course you would want to collect the exhaust air through a return
> tube to avoid getting oil on everything.
>
> Doug
>

This is a very nice description of air/oil lube for high speed spindles.
I think there is an arrangement to catch the pooled oil and recover it.
Done correctly ithe bearings might act as a centrifuge and collect the oil on the perimeter.

Dave