From: Ralph Seguin 
To: "Dwight K. Elvey" , atm{at}shore.net
Reply-To: Ralph Seguin 


There are charts and equations for figuring out the right speed.  Think of
it as surface speed.  The larger the diameter of the drill, the faster the
linear velocity will be at the outside, if the angular velocity is the
same.

Do a search on Feeds and Speeds or look in the Machinery's Handbook.

-Ralph

-+- "Dwight K. Elvey"  wrote:
>
> HI Eric
>  Larger diameters should be slower. This is
> something
> you'll have to experiment with. Too fast and you'll
> damage the drill bit. Too slow and you'll get slow
> speed oscilations and jamming. For most people, they
> don't slow down enough for the larger bits. Try to
> think of the speed of the tip of the drill fluke as
> being the same as the 1/8" you drilled with earlier.
> Once the edge is burned on a bit, it will have to
> be carefully ground down to hard metal before it'll
> be good for anything but cheese and butter.
> Dwight
>
>
> >From: "Eric Smith" 
> >
> >Thanks for all the replies.  I'm getting a drill
> press -- but one more
> >question:
> >
> >Many of you have mentioned using the "right speed".
>  Is this fast, or
> >slow?
> >
> >Thanks,
> >Eric
> >
> >
> >
>
>
>


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