Re: [CAD_CAM_EDM_DRO] Speaking of VFDs

>

> The Bridgeport 2J head with the dual-speed motor allows you to get 4250
> RPM maximum. I have heard from a few people that if you run the
> machine at that speed a lot (making mold cavities with small carbide
> tools, for example) the main spindle bearings won't last very long, maybe
> about a year, if you are lucky! That soundls like an expensive proposition
> for a home shop!
>
> Jon
>