Re: RR Bullbars

A

Austin Shackles

Guest

• Sep 3, 2004

• #1

On or around Fri, 3 Sep 2004 23:15:26 +1000, "The Becketts"
<[email protected]> enlightened us thusly:

>Don't use stainless bolts on the bullbar. Use high tensile bolts if you
>intend to use the recovery points on the bar. Stainless bolts are only about
>as strong as mild steel.

depending on the quality, mind. A2-80 are not far off 8.8 High tensile.
not that most stainless are that spec. A2-70 are common, which ain't quite
so tough.

mind, I'd not use a bull bar on standard bumper mounts as a recovery point
meself from choice. the bumper mounting bolts are none too big and only 4
of 'em.

 

N

Nicknelsonleeds

Guest

• Sep 4, 2004

• #2

>mind, I'd not use a bull bar on standard bumper mounts as a recovery point
>meself from choice. the bumper mounting bolts are none too big and only 4
>of 'em.

They do look a bit weedy, but since JATE rings only
use one (each) I assume they would be up to it.

Nick

 

A

Austin Shackles

Guest

• Sep 4, 2004

• #3

On or around 04 Sep 2004 05:06:59 GMT, [email protected]
(Nicknelsonleeds) enlightened us thusly:

>>mind, I'd not use a bull bar on standard bumper mounts as a recovery point
>>meself from choice. the bumper mounting bolts are none too big and only 4
>>of 'em.
>
>They do look a bit weedy, but since JATE rings only
>use one (each) I assume they would be up to it.

I suppose. They're 7/16" bolts AFAIK, and the load is in shear, it should
be possible to calculate.


which reminds me, I've got to look into strengths of steel anyway.

 

P

Paul S. Brown

Guest

• Sep 4, 2004

• #4

Nicknelsonleeds wrote:

>>mind, I'd not use a bull bar on standard bumper mounts as a recovery point
>>meself from choice. the bumper mounting bolts are none too big and only 4
>>of 'em.
>
> They do look a bit weedy, but since JATE rings only
> use one (each) I assume they would be up to it.
>

My JATEs came with A2-80 bolts of their own to replace the bumper mount
bolts. I've never actually met a set that used the OE bumper mounting
bolts.

P.

--
The email address above is real.

http://www.geekstuff.tv/Landies/

 

D

David G. Bell

Guest

• Sep 4, 2004

• #5

On 04 Sep, in article
<[email protected]>
[email protected] "Nicknelsonleeds" wrote:

> >mind, I'd not use a bull bar on standard bumper mounts as a recovery point
> >meself from choice. the bumper mounting bolts are none too big and only 4
> >of 'em.
>
> They do look a bit weedy, but since JATE rings only
> use one (each) I assume they would be up to it.

Different materials, and how they're fixed to the chassis...

--
David G. Bell -- SF Fan, Filker, and Punslinger.

"History shows that the Singularity started when Sir Tim Berners-Lee
was bitten by a radioactive spider."

 

P

Paul S. Brown

Guest

• Sep 5, 2004

• #6

David G. Bell wrote:

> On 04 Sep, in article
> <[email protected]>
> [email protected] "Nicknelsonleeds" wrote:
>
>> >mind, I'd not use a bull bar on standard bumper mounts as a recovery
>> >point
>> >meself from choice. the bumper mounting bolts are none too big and only
>> >4 of 'em.
>>
>> They do look a bit weedy, but since JATE rings only
>> use one (each) I assume they would be up to it.
>
> Different materials, and how they're fixed to the chassis...
>

Materials yes, but they share the bottom mounting bolt on the front bumper -
it's only at the rear they have a separate mount.

P.
--
The email address above is real.

http://www.geekstuff.tv/Landies/