Date:         Thu, 13 Sep 2007 20:13:48 -0700
Reply-To:     Reinhard Vehring <rvehring@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Reinhard Vehring <rvehring@YAHOO.COM>
Subject:      Re: 924 cv joints
Comments: To: Mike <mbucchino@charter.net>
In-Reply-To:  <048b01c7f5f1$0fc85860$0a00a8c0@OWNERMIKE>
Content-Type: text/plain; charset=iso-8859-1

Mike, you are right, the ball cage opening is the same
width as the ball, but it is longer than the ball. The
Porsche 924 has a cage opening of about 24.5 x 17.5 mm
and the Type 2 is about 26 x 20 mm. That allows the
ball to travel 7 mm (924) versus 6 mm (Type 2) The
angle of the races is about the same in the joints as
far as I can tell. So the 924 can extend or bend a
little more before it binds. The type 2 joint is
limited to the lower articulation because of the 20 mm
ball size. Making the openings in the ball cage longer
doesn't work becuase there isn't enough material left
between the slots to enlarge them much.
Now the question is really: Is the advantage of more
articulation worth the disadvantage of a weaker joint
and faster wear?
Reinhard

--- Mike <mbucchino@charter.net> wrote:

> The opening in the ball cage is a fixed size to
> exactly match the ball.  The
> can't be any room for movement between the ball and
> the cage; it retains the
> ball.  The inner and outer races have the grooves
> cut into them to allow
> angular movement.
>
> Mike B.
>
> ----- Original Message -----
> From: "Reinhard Vehring" <rvehring@YAHOO.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, September 13, 2007 2:49 AM
> Subject: Re: 924 cv joints
>
>
> >I think I understand it somewhat better now. The
> range
> > of motion of a cv joint is really determined by
> the
> > openings in the ball cage. The balls move in the
> slots
> > if the joint is extended or bent. Once the balls
> hit
> > the end of the slot the joint can't bend any more
> or
> > extend any more. It seems that this is really a
> > problem that is a combination of extension and
> angle.
> > Both joints will go much farther than 22 deg when
> in
> > center position.
> > So where is the axle riding? Inner joint all the
> way
> > extended, outer joint all the way pushed in or
> > somewhere in the middle? I'd think the friction in
> a
> > joint will increase the faster the balls travel,
> that
> > is the more it is extended or bent. So I guess
> it'll
> > push the axles somehwere to the middle if both
> joints
> > are worn and lubricated the same. Man this is much
> > more complicated than I thought.
> > Reinhard
> >
> >
> >
> >
> > --- Joel VanderKwaak <joelvanderkwaak@gmail.com>
> > wrote:
> >
> >> Not sure if this answers your question, but
> several
> >> cvs are compared here:
> >>
> >>
> >
>
http://www.blindchickenracing.com/How_to/CVJoints_Axles/cv_joints_101.htm
> >>
> >> On 9/11/07, Reinhard Vehring <rvehring@yahoo.com>
> >> wrote:
> >> >
> >> > Dear listees,
> >> > I bought a Porsche 924 cv joint, because they
> >> > supposedly have more articulation than the
> vanagon
> >> cv
> >> > joints (22 vs 17 deg if I remember right) I
> have
> >> them
> >> > both sitting in front of me now. I'm surprised
> how
> >> > similar they are. The biggest difference is
> that
> >> the
> >> > balls in the Porsche joint are smaller. So here
> is
> >> the
> >> > question for the experts: What determines the
> >> maximum
> >> > running angle of a cv joint? BTW does anyone
> know
> >> > where that info about articulation (22 vs 17
> deg)
> >> > comes from. I read it on the list but can't
> find
> >> it
> >> > anymore. I get the suspicion that the Porsche
> >> joint
> >> > isn't any stronger, maybe even the opposite.
> >> > Take care,
> >> > Reinhard
> >> >
> >> >
> >> >
> >> >
> >> >
> >>
> >
>
____________________________________________________________________________________
> >> > Got a little couch potato?
> >> > Check out fun summer activities for kids.
> >> >
> >> >
> >>
> >
>
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> >> >
> >>
> >
> >
> >
> >
> >
>
____________________________________________________________________________________
> > Got a little couch potato?
> > Check out fun summer activities for kids.
> >
>
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> >
>
>
>




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