heyzee
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| posted on 2/1/04 at 07:45 PM |
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bolt strengths
when fitting the wishbones and shockers do you need to use high tensile bolts(10.9)or are (8.8)o.k.and are the ball joints o.k. connected to the arms
with 8.8
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craig1410
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| posted on 2/1/04 at 08:25 PM |
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Hi,
8.8 Ton bolts ARE high tensile, 10.9 are just higher still. Non high tensile can be anything from 4.8 ton upwards and will vary as they are
ungraded.
Assuming that they are M10 or larger, 8.8 Ton bolts are fine for bolting your wishbones onto the chassis and at each end of your shock absorbers but I
would tend to use 10.9 or even 12.9 ton bolts for the balljoint to wishbone fasteners as these are quite highly stressed and the consequences of
failure are pretty high. If your shock absorbers use 1/2" diameter bolts then the grade you need is also known as 'S' grade which is
just another name for 8.8 ton.
Even Lolocost supply 10.9 ton bolts for the smaller bolts on the ends of the balljoint although they only supply 8.8 ton for the big M12 (or whatever
they are). I think that this is the minimum that you would want and anything more than this should be considered a further safety margin and is
probably worthwhile for peace of mind.
I hope this helps.
Cheers,
Craig.
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craig1410
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| posted on 2/1/04 at 08:28 PM |
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Hi again,
I should also mention that as with most fasteners you will need to tighten them to the appropriate torque and this is dependent on the size and grade
of the bolt as well as the application. This is outside my area of expertise so I'll let some of the other guys step in here. This has been
answered before though so a search of the forum might be useful.
Cheers,
Craig.
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stephen_gusterson
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| posted on 3/1/04 at 12:13 AM |
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cortina joints hold on with (i think) 2 8mm bolts and two 12mm bolts at the end of the big tab.
IIRC, astra / maxi / whatever seem to use two bolts (10mm or so?)
The cortina one seems pretty well bolted down to me!
its the 10mm bolts thro the shocks that seem to take the load.......
atb
steve
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Mk-Ninja
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| posted on 3/1/04 at 09:52 AM |
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Ive got a chart for torque settings if you want it, give me a shout and Ill Email it to you.
Gordon
I'm sure I've got one, just don't know where I've put it
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heyzee
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| posted on 3/1/04 at 10:54 AM |
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bolt chart
mk if you could mail me the chart that would be great ,no imediate rush though,im still only trial fitting everything.thanx
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craig1410
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| posted on 3/1/04 at 11:45 AM |
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MK,
Any chance of a copy of that torque chart too please? Email to:
locostbuilder@craig.chamberlain.name
Thanks!
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Mark Allanson
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| posted on 3/1/04 at 11:46 AM |
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Gordon, I would like the chart if you could send it
Thanks
Mark
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Mk-Ninja
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| posted on 3/1/04 at 12:01 PM |
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I think Ive sent it to all as requested, if you havent got my Email let me know.
Gordon
I'm sure I've got one, just don't know where I've put it
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Northy
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| posted on 3/1/04 at 01:20 PM |
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Er, I'm a bit late, but could you send it to me please also?
Cheers
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing! 
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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Mark Allanson
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| posted on 3/1/04 at 01:22 PM |
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All recieved, thanks Gordon
Mark
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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GO
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| posted on 3/1/04 at 02:48 PM |
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Any chance it could be posted in the photo archives? If not could you send me a copy please.
Cheers.
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craig1410
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| posted on 3/1/04 at 03:44 PM |
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GO,
It was a word document but I've extracted the image which should appear below. I hope you don't mind Gordon?
Cheers,
Craig.
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Mk-Ninja
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| posted on 3/1/04 at 03:45 PM |
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Hi GO
Ive sent the chart to you on Email.
I tried to put it in the photo archive but it said it was the wrong format ( its a word doc).
Ill send ChrisW an Email to see if theres an easy way of converting it.
Oops you beat me to it THANKS
Gordon
[Edited on 3:1:04 by Mk-Ninja]
I'm sure I've got one, just don't know where I've put it
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GO
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| posted on 3/1/04 at 06:45 PM |
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Thats great, cheers guys.
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Rorty
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| posted on 6/1/04 at 05:23 AM |
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That's the oddest chart I've ever seen. It mixes metric and imperial nomenclature, and the values seem low. What's the source if you
don't mind my asking?
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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Mk-Ninja
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| posted on 6/1/04 at 08:43 AM |
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Hi Rorty
It was compiled by one of the fastener manufactures for a large engineering company I used to work for. I must admit that I have never recalculated
the figures but it was used for many years without problems.
Gordon
I'm sure I've got one, just don't know where I've put it
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kingr
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| posted on 6/1/04 at 10:34 AM |
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Are cap head bolts always 12.9 then?
Kingr
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Mk-Ninja
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| posted on 6/1/04 at 10:57 AM |
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I have only ever seen and used HT Capheads, that is not to say that you cant get lower spec bolts in capheads form.
Like I said above the chart was put together for the company I worked for and they only used HT capheads, if you find yourself with a 8.8 Caphead then
use the 8.8 column.
It was used as a general guide, we gave specific torque figures for aplications where the figures on the chart would be inappropriate, and I can only
say that the figures never caused concern.
It would be good if anybody else has figures to either support or update the ones I have.
Gordon
I'm sure I've got one, just don't know where I've put it
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Mk-Ninja
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| posted on 8/1/04 at 04:25 PM |
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Ive just got hold of an Unbrako caphead bolt catalogue and all the figures are the same as the chart above so that gives me confidence that the others
will be OK as well, but I will try and get those figures confirmed.
Gordon
I'm sure I've got one, just don't know where I've put it
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