I think Scott may be talking about poor wheel balance due to uneven material
removal, but something else to consider is how wheel balancing machines
work- a cone shaped chuck is tightened into the wheel bore.  If the bore
hole is not perfectly centered the balance machine will not accurately
determine proper balance.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Scott Daniel - Turbovans
Sent: Monday, February 01, 2010 4:02 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: PDX Machine Shop Recommendation?

I would much rather have it machined properly.
factors are integrity of the wheel, balance, etc.

hog it out by hand if you must, but I don't think much of that idea.
Wheels are extremely important from a safety point of view.

and please have long enough wheel studs or wheel mounting bolts,
and the right ball face to match the wheel.
it's more fun to do it right I think.

----- Original Message -----
From: "Jake de Villiers" <crescentbeachguitar@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, February 01, 2010 11:39 AM
Subject: Re: PDX Machine Shop Recommendation?

>A 1/2" shankcarbide router bit works very well on aluminium, but its not a
> job for a neophyte!  =)
>
> On Mon, Feb 1, 2010 at 11:13 AM, Sudhir Desai
> <sudhir.desai@gmail.com>wrote:
>
>> why not just measure 7mm around, and use an angle die-grinder to
>> remove the material~
>> just make sure to keep the metal cooled by a stream of water, or tool
>> coolant.
>>
>> Sudhir