I think it's really a peen nut because that's cheaper to make,
than a castle nut and spindle with a hole in it for the cotter pin.

the cotter pin is just slightly off center ..
that gives 'half' of each division of the castle nut possible...or double
the number of slots in the castle nut -  I believe, plenty enough choices
for fine adjustment.

----- Original Message -----
From: "David Beierl" <dbeierl@ATTGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, January 19, 2011 4:47 PM
Subject: Re: Front Wheel Bearing Adjustment (searched)

> At 10:06 AM 1/19/2011, neil n wrote:
>>What is the most fool proof method for acheiving the correct torque on
>>nut after preload?
>
> Do precisely what they tell you in Bentley.  Once you've achieved the
> correct preload (can shift the washer with your screwdriver tip
> without using it as a lever) you peen the nut in place exactly where
> it is right there.  You have to use an unused spot to peen, so you
> get to use the nut maybe 3-4 times before you need a new one.
>
> That's why it's a peen nut and not a castle nut -- tiny fractions of
> a turn matter.
>
> Yours,
> David