Re: Track bar and grade bolt?
 

And then real life steps in and all the math goes out the window....

Mike

Jim Boucher wrote:
>
> The shear strength of a fastener is typically about 60% of its ultimate tension
> strength. A Grade 8 bolt has a 30% higher tensile strength than a similar Grade
> 5.
> Do the math. Use Grade 8.
> Jim
>
> 88 Grand Wagoneer
> 89 Wrangler
> 00 Grand Cherokee

Re: Track bar and grade bolt?
 

And then real life steps in and all the math goes out the window....

Mike

Jim Boucher wrote:
>
> The shear strength of a fastener is typically about 60% of its ultimate tension
> strength. A Grade 8 bolt has a 30% higher tensile strength than a similar Grade
> 5.
> Do the math. Use Grade 8.
> Jim
>
> 88 Grand Wagoneer
> 89 Wrangler
> 00 Grand Cherokee

Re: Track bar and grade bolt?
 

Mike, maybe you got a "fake" Grade 8 bolt but a Grade 8's shear strength
truly is greater than a Grade 5. A Grade 5 will DEFORM before it breaks
giving perhaps greater warning than a Grade 8 will but it will still
snap/shear before a Grade 8 will even begin to deform... but a Grade 8 will
not deform as much as a Grade 5 will before it snaps.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
N6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40117ECB.CCC8C4CD@sympatico.ca...
> And then real life steps in and all the math goes out the window....
>
> Mike
>
> Jim Boucher wrote:
> >
> > The shear strength of a fastener is typically about 60% of its ultimate
tension
> > strength. A Grade 8 bolt has a 30% higher tensile strength than a
similar Grade
> > 5.
> > Do the math. Use Grade 8.
> > Jim
> >
> > 88 Grand Wagoneer
> > 89 Wrangler
> > 00 Grand Cherokee

Re: Track bar and grade bolt?
 

Mike, maybe you got a "fake" Grade 8 bolt but a Grade 8's shear strength
truly is greater than a Grade 5. A Grade 5 will DEFORM before it breaks
giving perhaps greater warning than a Grade 8 will but it will still
snap/shear before a Grade 8 will even begin to deform... but a Grade 8 will
not deform as much as a Grade 5 will before it snaps.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
N6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40117ECB.CCC8C4CD@sympatico.ca...
> And then real life steps in and all the math goes out the window....
>
> Mike
>
> Jim Boucher wrote:
> >
> > The shear strength of a fastener is typically about 60% of its ultimate
tension
> > strength. A Grade 8 bolt has a 30% higher tensile strength than a
similar Grade
> > 5.
> > Do the math. Use Grade 8.
> > Jim
> >
> > 88 Grand Wagoneer
> > 89 Wrangler
> > 00 Grand Cherokee

Re: Track bar and grade bolt?
 

Mike, maybe you got a "fake" Grade 8 bolt but a Grade 8's shear strength
truly is greater than a Grade 5. A Grade 5 will DEFORM before it breaks
giving perhaps greater warning than a Grade 8 will but it will still
snap/shear before a Grade 8 will even begin to deform... but a Grade 8 will
not deform as much as a Grade 5 will before it snaps.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
N6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:40117ECB.CCC8C4CD@sympatico.ca...
> And then real life steps in and all the math goes out the window....
>
> Mike
>
> Jim Boucher wrote:
> >
> > The shear strength of a fastener is typically about 60% of its ultimate
tension
> > strength. A Grade 8 bolt has a 30% higher tensile strength than a
similar Grade
> > 5.
> > Do the math. Use Grade 8.
> > Jim
> >
> > 88 Grand Wagoneer
> > 89 Wrangler
> > 00 Grand Cherokee

Re: Track bar and grade bolt?
 

http://www.rockcrawler.com/techrepor...ners/index.asp

--
bob z.

"people with less brain power than you are doing more difficult things
everyday"©

Re: Track bar and grade bolt?
 

http://www.rockcrawler.com/techrepor...ners/index.asp

--
bob z.

"people with less brain power than you are doing more difficult things
everyday"©

Re: Track bar and grade bolt?
 

http://www.rockcrawler.com/techrepor...ners/index.asp

--
bob z.

"people with less brain power than you are doing more difficult things
everyday"©

Re: Track bar and grade bolt?
 

That can't be true though, and any bolt will break if it's too
loose. Bolts specs:
http://www.americanfastener.com/tech...ings_steel.asp
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> I know a few folks that used them in engine mounts and they just shear
> right off. They would then blow them out of the cast with a torch and
> try again and again until finally they went back to regular no grade or
> gr. 5 at the most bolts and the problem stopped.
>
> They are/seem too hard and snap under side impact or shear force.
>
> Same for winch and tow hook mounts.
>
> Mike

Re: Track bar and grade bolt?
 

That can't be true though, and any bolt will break if it's too
loose. Bolts specs:
http://www.americanfastener.com/tech...ings_steel.asp
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> I know a few folks that used them in engine mounts and they just shear
> right off. They would then blow them out of the cast with a torch and
> try again and again until finally they went back to regular no grade or
> gr. 5 at the most bolts and the problem stopped.
>
> They are/seem too hard and snap under side impact or shear force.
>
> Same for winch and tow hook mounts.
>
> Mike