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

In a message dated 11/30/2006 3:15:50 P.M. Eastern Standard Time,
cncgroupnospam@... 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@...

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]