I need to know exactly what sort of steel alloy the original lug bolts
(also known as lug studs,OEM # is O8060-126384)for a 1974 Datsun
(Nissan) 260Z are made from. I know they are steel, but I need to
know the specific alloy. I would also like to know the dimensions
and/or geometry of these lug bolts. Any figures or drawings showing
this would be greatly appreciated. The last piece of information
needed is any details regarding the heat treatment process undergone
by the alloy used to make the lug bolts.
In order of importance:
1) Type of alloy (necessary)
2) Dimensions (very helpful, but not absolutely necessary)
3) Heat treatment process of alloy (helpful, but not necessary)
Thank you. |
Request for Question Clarification by
alienintelligence-ga
on
30 Nov 2004 14:06 PST
Hi bogotakid,
What are the odds a GAR is a
Datsun owner too :)
I asked several sources that
are close to Datsuns including
a great source from Universal
Nissan in Universal City, CA,
and online, my car groups, after
chuckling at the complexity
of the knowledge I sought they all
told me basically the same thing,
Original Datsun tech spec sheets,
[Japanese translator anyone?] or
the designer himself. I don't think
they were joking about the second
part, either.
So, after meeting those barriers,
can I inquire why you need this
info? If it's for application,
wouldn't it be easier to replace
with a known alloy and dimensional
material?
If it's for calculation, or just
plain speculation, maybe it would
be time to select a different
make and model? -;0)
The dimensions will actually be
the easy part, provided a live
model can be produced. If enough
info is found, a CAD drawing, or
orthographic projection could be
created.
Heat treatment will be answered
with Alloy I'm sure.
Maybe Mr Morton himself, or
one of his crew chiefs might
know.
-AI
|
Clarification of Question by
bogotakid-ga
on
30 Nov 2004 18:10 PST
Hello,
It's for a class. One of my samples for my Materials class is this
lug bolt that my coworker gave me. The lug bolts and nuts remains
part of the original Datsun (my coworker has since converted a
majority of this car for racing). I ran the sample under an EDS scan
to try to determine the alloy, but I was notified not to trust the
results of the scan since it was not working properly. I'm doing an
analysis of why the bolt failed. I'm certain its a fatigue failure
but knowing the specs of the alloy (particularly alloy/treatment)
would greatly support/hurt my findings.
If you can't find the specific alloy for this bolt- can you give me a
more educated guess as to what other Nissan (or other) bolts alloys
were used in the same time period (references would be good too).
Thanks.
|
Request for Question Clarification by
alienintelligence-ga
on
30 Nov 2004 22:01 PST
Hmmm, well I haven't exhausted
all avenues of information and
now you have my curiosity peaked.
My Datsun 510 has had a 4-wheel
swap to a 280Z rolling chassis,
which means it probably has the
same lug studs in question. I can
try to find that out by tomorrow
night.
If the scientific method is the
preferred way of answering this...,
then the next statement won't help
much... But I can tell you it is
definitely shear stress accompanied
by a large-sweep thermal cycle
causing crystalline rearrangement
and eventually cleavage thru planes.
I had a Olds drag car that ate studs
left n right. Uh, literally... hehe.
And that was straight-line use. As
I stopped at the end of the 1320' the
extreme braking caused a heat spike
that I considered the culprit.
A cooling period, followed by getting
viciously hammered by the built
TH350. Eventually did the bolts in
one by one.
We studied one under a microscope and
the two separated ends were borderline
sparkly with obvious crystalline structure
and a clean plane of separation that could
have been induced during the bolt's creation.
I had at the time also taken the Aluminum
wheel against Steel rotor as a possible
thermal zoning that would increase
transient stresses. I had no way to
easily test that theory though. And
definitely no EDS at my disposal,
calibrated or not ;)
I'll see what I can find? maybe someone
else will chime in, with a freshly translated
Datsun 260Z spec sheet?
-AI
|
Clarification of Question by
bogotakid-ga
on
02 Dec 2004 05:39 PST
any other clarifications? Or is this a dead end?
|
Request for Question Clarification by
alienintelligence-ga
on
03 Dec 2004 00:27 PST
No... it's not dead =(
but I think it might be
beyond your timeframe.
I admit I enjoy asking
this stumper to everyone
that thought they knew
everything about Datsuns
=)
It's almost become dinner
talk. But... it seems until
I come across someone with
a spec sheet, the only way
to get the info, is find a
calibrated machine to test
the stud with.
The prevailing answer is,
all the Nissan heads say
that all of the common
year vehicles will share
the same studs. So, that
should give a wider range
of specs to study.
If you come up with the
answers... please post it
here, or even to Bluebirds
maillist,
[ http://dimequarterly.tierranet.com/articles/artl_www.html ]
I'm sure there'll be another
Drifter or SCCA that can use
the info.
-AI
|
