[modeleng] Re: Piloted "D" Bit

Hi Al,
It's common practice to make the pilot pin as a separate item pressed in 
to the shank after the bit is hardened. Hope that helps,

John

Allen Messer wrote:
> I need to make a "D" Bit with some extra reach to it
> in order to counter-bore some Allen head bolt seats in
> a hard to reach place.  I plan to make it out of
> Silver Steel and harden it.  How  it is possible to
> make one wherein the "pilot" won't warp during the
> hardening process?  I've tried it a couple of times
> and the pilot wants to warp when quenching out.  TIA
>
> Al Messer
>
>
>       
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