Re: [ATM] Another machining question, please

["Don Clement" <don_clement@charter.net>]

If the drill bit is HSS (high speed steel)  then the drill bit does not need
to be re-hardened or tempered in any way after grinding. Most  common drill
bits are HSS.

Don Clement
Running Springs, California


> Thomas,
>
> Would the drill need to be re-hardened after grinding?
>
> Thanks,
>
> Gary Fuchs
>
>
> Thomas Janstrom wrote:
>
> >Hi Tom,
> >
> >You want to re-grind the drill to a profile that will cut the sort of
hole
> >you want, that way the drill can cut the shoulder that you need.
> >
> >And yes, you never quite have all the tools that you need/want/can have,
> >that's where asking comes in, some one will know of a "cheat" to get the
job
> >done anyway!
> >
> >Cheers, Thomas.
> >
> >-----Original Message-----
> >From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf
Of
> >Thomas A Simmons
> >Sent: Friday, 16 February 2007 11:47 PM
> >To: atm@atmlist.net
> >Subject: Re: [ATM] Another machining question, please
> >
> >
> >and how to modify a drill bit to grind (??) the bottom flat.
> >
> >
> >
> >
> >
> >Evidently, I don't have enough tools (VERY big laugh).
> >
> >
> >
> >
> >
> >Tom
> >Too stubborn to quit being an ATMer
> >
> >

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