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.

Oil mist lubrication has been used for years in high power router heads,
high speed milling and grinding spindles, experimental jet engines, and all
sorts of other things.

Jon