At 11:59 AM 6/15/2010, John Rodgers wrote:
>I would like to add at this point - if you can find them - get
>Silver & Deming drill bits. You will pay a premium - but you won't
>be sorry you got them.
>
>When it comes to difficult drilling, Silver & Deming are the best
>bits ever. They are often used in machine shops and in machine
>lathes because of their ability to drill really hard materials
>finely and accurately and yet keep the cutting edge throughout the
>process. Cutting oil is essential however, as with all hard metal drilling.

Dear John,

We can discuss twist drills off-line, if you like.  But for
clarification, Silver & Deming are stub-length drill bits made with a
reduced shank so you can use them in a drill motor with only a
half-inch chuck.  They can be made of any material and to any quality.

Leaving aside the Silver & Deming part, stub-length drills are much
favored in the machine trades because they're a good deal stiffer
than jobber-length, and less inclined to wander.

Yours,
David