PinBlock Drill Press

[Paul]

Conrad
We used a process of friction welding in the machine shop: The "bit" was
chucked backwards in the chuck and a rod of the same diameter was held
tightly in the tailpiece chuck. The lathe was turned on and the two pieces
were pressed together causing enough friction to heat and fuse them. At that
point the lathe was turned off and the rod immediately released and allowed
to cool. The result was a drill extension perfectly aligned with the bit-no
wobble.

Paul Chick
----- Original Message -----
From: Conrad Hoffsommer <hoffsoco@martin.luther.edu>
To: <pianotech@ptg.org>
Sent: Saturday, September 23, 2000 9:25 PM
Subject: Re: PinBlock Drill Press


> Terry,
> At 18:31 09/23/2000 -0400, you wrote:
>
> >> Second, consider a longer bit, they do
> >> come as long as 12" but that may be too long.
> >> The high spiral longer bits can be purchased from him or
> >> from Geneva Imports or do a search for longer bits on the
> >> nets.
>
> >Great! That is all I need. If I can get an 8" long pinblock drill bit of
> >appropriate diameter, I will be all set. I will call Webb/Geneva Monday
> >morning. This was the info I was looking for. Thanks a bunch.
>
>
>
> The method I used was to have a good welder weld an extension to
> the bit, and I cut _that_ (milder steel) to the length I needed.
>
> Gotsta be a good welder, though.  Wobbly bits don't help much.
>
>
> Conrad Hoffsommer - Luther College, Decorah, IA
> Eschew Obfuscation.
>