Homebrew PCBs

Hi Stefan,

Yes I use them regularly. They last a suprisingly long time. If you are 
only cutting through one thickness of board you can feed at quite a high 
rate as well. You do need a reasonable spindle speed. Mine is about 
10000RPM which is probably a little slow. I don't know how well a Dremel 
type tool will handle the side loads though. If the spindle chatters in 
slack bearings you are likely to break the cutter.

BTW use good extraction because it does produce quite a lot of dust.

Les

Stefan Trethan wrote:

>hi,
>
>
>Does anyone use those milling bits to cut out boards? The ones with the  
>diamond pattern all over the business end which look otherwise just like  
>PCB drills.
>
>If this works well then i can wait until i have my CNC and use the  
>sheetmetal shears until then, otherwise i must make a shaft for that  
>carbide saw somehow. Pretty hard to do without lathe and the last attempt  
>was a bit too much out of round.
>
>I'm worried about the huge amount of material that is milled away,  
>wouldn't that dull the bit quickly?
>
>ST
>  
>