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Andrew Barss Andrew Barss is offline
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Default Extended length drill bits

Markndawoods wrote:
: I am needing to drill 30 - 36" into the end of a 1" dowel, with a half inch
: bit. Built a jug, centering etc not an issue. What I am unfamiliar with is a
: bit to go that deep. I tried starting with a standard 5" HSS and followed
: with an electricians boring bit, but that just lost center an blew out the
: side.

: A quick search on google showed various places selling long bits, many
: without the lead screw, which it turns out will cause tremendous damage in
: end grain g. So I can locate a vendor, but wondering if someone might
: already be buying form somewhere.

: Does anybody have any experience with something like this? Perhaps someone
: has a source they feel is reliable for such things?

: Perhaps I am on my own!?


If you search for "lamp drill" or "lamp auger" or
"D bit" on rec.crafts.woodturning, you'll turn up directions for making a
proper bit for this from drill rod. It just involves a special way of
grinding a flat on the end parallel to the axis of rotation.

-- Andy Barss