Never had a problem here.  Just go slow and easy.  Keep checking the angle of your drill.  Once you get a good straight pilot hole, and then drill with the proper size bit for the 6mm tap the tap will follow the hole.

On 2012-08-18, at 12:00 AM, Automatic digest processor <LISTSERV@GERRY.VANAGON.COM> wrote:

> All in all, I'd say it is a tricky job to get a good tapped hole in =
> shaft.

Cheers,    

Frank Condelli
Almonte, Ontario, Canada
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