RE: [gingery_machines] new article available: Drill, Tap, and Counterbore

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Tuesday, May 31, 2011

 

Steve,

Interesting modification to a drill but IMHO, beyond what a person new to
the hobby can handle. However, it would make for an interesting new article
:-))

Rick

-----Original Message-----
From: gingery_machines@yahoogroups.com
[mailto:gingery_machines@yahoogroups.com] On Behalf Of Steve Wan
Sent: Tuesday, May 31, 2011 7:25 PM
To: gingery_machines@yahoogroups.com
Subject: Re: [gingery_machines] new article available: Drill, Tap, and
Counterbore

Hi guys!

Nice info you got there...perhaps Ron is correct not to use mill
cutters on the spindle chuck. My approach is different, I learnt this
trick from my training school long ago. I would grind my drill bit
almost flat. With a 0.5mm normal drill bits slightly bigger, I drill a
shallow step as a guide and use this flat drill to counterbore and
c'sink or debur with a hand-drill.

If the c'sunk hole is deep, I would use the ratchet brace like the pdf file.

Steve-S'pore

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