Diff types

[Pat Ford]

Previously, you (Todd....!!) wrote:
> OK Jim,
> 
> Must ask, what's hypoid gearing?  Sounds interesting....

hypoid gears are a special cut in gears that allows the pinion to 
be on a different plane then the crown. older cars the pinion went
straight into the middle of the axle ( as veiwed form the side). That
made high tunnels in the floor

I'll try some ascii art

                ____
               /    \   crown 
pinion  =====>(  +   )
               \    /
                ---

hypoid is:

               -----
              /     \
             (   +   )
pinion ======>\     /
               ----

it's hard to get a circle in ascii. The big problem with a hypoid gearset
is the gears slide into mesh ( wasted friction)


next time you look at a pinion gear look at how the teeth are curved that is 
the hypoid cut

hope that helps

> 
> Off-list, if ya must!
> 
> Thanks!
> 
> Todd....
> 
> Jim Davies wrote:
> > 
> > On Wed, 2 Jun 1999, SPECTRO COATING CORP. wrote:
> > 
> > > Actually - Torsen was the manufacturer - Bob (I think that's his first name)
> > > Gleason invented that differential design. Zexel was the manufacturer last i
> > > knew.
> > >
> > Last name was actually Gleasman, but he changed it to Gleason. Also known
> > for hypoid gearing...
> 
> 

--
Pat Ford                           email: pford at qnx.com
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