Re: [CAD_CAM_EDM_DRO] Homemade high-speed spindles/speed multiplier. What bea...

I would think you want angular contact bearings to support the side loads
you'll encounter in cutting operations. If you're just drilling, you may
not need them.

Doug

On 12/1/06, cnc002@... <cnc002@...> wrote:
>
>
> In a message dated 11/30/2006 3:15:50 P.M. Eastern Standard Time,
> cncgroupnospam@... <cncgroupnospam%40silverkatt.co.uk>writes:
>
> Hi All,
>
> I'm looking at making my own belt/pulley based spindle speed multiplier
> for my CNC mill, and was wondering what bearings I should be using? The
> milling cutter itself will be quite small (1/8" or 3mm), and high-speed
> so it doesn't need to be too-beefy.. the reason I ask is that angular
> contact bearings are quite a bit larger than regular sealed-race
> ballbearings - and more expensive, I'm not sure though if the price
> warrants the extra expenditure - a ballbearing based spindle would be
> more streamline and easier to make...
>
> I've seen some fantastic pages of people (on this list) who've made
> their own fantastic spindles - so this is why I ask. :)
> I intend to "open source" the design when it's done, and post all plans,
> drawings, 3D models, construction pics, and a how-to guide on my
> website....
>
> Thanks for any advice,
> Regards,
> Abby
> (http://www.silverkatt.co.uk)
>
> Abby:
>
> When you say "high speed" what rpm range are you looking at? If it is up
> in
> the 20,000 rpm range like many router spindles you will need special
> bearings that do NOT have metal inner bearing retainers and also using
> thrust type
> ball bearings would be recommended.
>
> Hope this helps some.
>
> Randy Abernathy
> 4626 Old Stilesboro Road NW
> Acworth, GA 30101-4066
> E-mail: cnc002@... <cnc002%40aol.com>
>
> I furnish technical support, repair, and other related services for your
> industrial woodworking machinery. My background as Senior Service Engineer
> for
> the SCMI Group for nearly fifteen years with factory training, combines
> with
> my extensive background in electronics, mechanics, pneumatics, electrical
> and
> CNC machinery to offer you needed support for your machinery. Services
> include but are not limited to the following:
>
> [Non-text portions of this message have been removed]
>
>
>


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