Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Old September 11th 07, 06:06 AM posted to rec.crafts.metalworking
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Default Moving center drilled hole

"Phil Kangas" wrote in message
.. .
Say you've laid out the end of a shaft for a center hole
to take a dead center and the hole comes out a bit off
center. How would you go about 'moving' the hole
back to center?
Phil Kangas


My favorite hole moving tool is a block of metal (steel preferred,
depends on what you have and the material you're moving the hole in) and a
gun barrel drill bit. Drill the hole in the guide block and attach that to
your material. It's essentially a drill bushing. A gun barrel drill (IIRC,
it's been awhile) only cuts on the face, so will cut without wanting to pull
off center too much.



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Old September 11th 07, 12:31 PM posted to rec.crafts.metalworking
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Default Moving center drilled hole

On Sep 10, 7:47 pm, "Phil Kangas" wrote:
...
First thing, replace the spindle dead center with a combined
drill / csk
( mine is a #6 mounted directly into a salvaged 3MT drill
shank) ...
Phil Kangas


I guess size does matter...

I've tried that in a mill with a #2 (Keo, I think) and broke the tip
off in the hole.

jw



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