Track bar and grade bolt?
01-23-2004, 12:19 PM
#11
Guest
Posts: n/a
Re: Track bar and grade bolt?
Nathan Collier wrote:
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40114382.DDA013AB@sympatico.ca...
> > What part of it causes the grade 8's to snap so easy? Too brittle?
>
> this is all new to me, since when do grade 8s snap easily?
>
> --
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
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40114382.DDA013AB@sympatico.ca...
> > What part of it causes the grade 8's to snap so easy? Too brittle?
>
> this is all new to me, since when do grade 8s snap easily?
>
> --
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
01-23-2004, 12:19 PM
#12
Guest
Posts: n/a
Re: Track bar and grade bolt?
Nathan Collier wrote:
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40114382.DDA013AB@sympatico.ca...
> > What part of it causes the grade 8's to snap so easy? Too brittle?
>
> this is all new to me, since when do grade 8s snap easily?
>
> --
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
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40114382.DDA013AB@sympatico.ca...
> > What part of it causes the grade 8's to snap so easy? Too brittle?
>
> this is all new to me, since when do grade 8s snap easily?
>
> --
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
01-23-2004, 12:19 PM
#13
Guest
Posts: n/a
Re: Track bar and grade bolt?
Nathan Collier wrote:
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40114382.DDA013AB@sympatico.ca...
> > What part of it causes the grade 8's to snap so easy? Too brittle?
>
> this is all new to me, since when do grade 8s snap easily?
>
> --
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
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40114382.DDA013AB@sympatico.ca...
> > What part of it causes the grade 8's to snap so easy? Too brittle?
>
> this is all new to me, since when do grade 8s snap easily?
>
> --
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
01-23-2004, 01:43 PM
#14
Guest
Posts: n/a
Re: Track bar and grade bolt?
I've heard from many different sources that the 8s are stronger but in a
lateral stress situation, they give out quicker than 5s.
Jerry Bransford wrote:
> A Grade 8's shear strength is still higher than a Grade 5. :)
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> N6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.***.net/jerrypb/
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:IFaQb.10809$sT7.7349@newssvr23.news.prodigy.c om...
>
>>I have an RE adjustable trackbar and am going to replace the bolt at the
>>frame end (not axle end). It is a gold grade 8 bolt, I believe. Now, I
>>understand that grade 5 has a better shear strength than 8, and since
>>the job of a trackbar is lateral which puts lateral stress on this bolt,
>>would I be better off with a grade 5 bolt?
>>--
>>________________________________________________ ___________
>>tw
--
__________________________________________________ _________
tw
03 TJ Rubicon
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: probably from g. p. (abbreviation of general purpose)
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
http://www.7slotgrille.com/jeepers/t...ron/index.html
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
lateral stress situation, they give out quicker than 5s.
Jerry Bransford wrote:
> A Grade 8's shear strength is still higher than a Grade 5. :)
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> N6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.***.net/jerrypb/
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:IFaQb.10809$sT7.7349@newssvr23.news.prodigy.c om...
>
>>I have an RE adjustable trackbar and am going to replace the bolt at the
>>frame end (not axle end). It is a gold grade 8 bolt, I believe. Now, I
>>understand that grade 5 has a better shear strength than 8, and since
>>the job of a trackbar is lateral which puts lateral stress on this bolt,
>>would I be better off with a grade 5 bolt?
>>--
>>________________________________________________ ___________
>>tw
--
__________________________________________________ _________
tw
03 TJ Rubicon
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: probably from g. p. (abbreviation of general purpose)
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
http://www.7slotgrille.com/jeepers/t...ron/index.html
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
01-23-2004, 01:43 PM
#15
Guest
Posts: n/a
Re: Track bar and grade bolt?
I've heard from many different sources that the 8s are stronger but in a
lateral stress situation, they give out quicker than 5s.
Jerry Bransford wrote:
> A Grade 8's shear strength is still higher than a Grade 5. :)
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> N6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.***.net/jerrypb/
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:IFaQb.10809$sT7.7349@newssvr23.news.prodigy.c om...
>
>>I have an RE adjustable trackbar and am going to replace the bolt at the
>>frame end (not axle end). It is a gold grade 8 bolt, I believe. Now, I
>>understand that grade 5 has a better shear strength than 8, and since
>>the job of a trackbar is lateral which puts lateral stress on this bolt,
>>would I be better off with a grade 5 bolt?
>>--
>>________________________________________________ ___________
>>tw
--
__________________________________________________ _________
tw
03 TJ Rubicon
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: probably from g. p. (abbreviation of general purpose)
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
http://www.7slotgrille.com/jeepers/t...ron/index.html
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
lateral stress situation, they give out quicker than 5s.
Jerry Bransford wrote:
> A Grade 8's shear strength is still higher than a Grade 5. :)
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> N6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.***.net/jerrypb/
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:IFaQb.10809$sT7.7349@newssvr23.news.prodigy.c om...
>
>>I have an RE adjustable trackbar and am going to replace the bolt at the
>>frame end (not axle end). It is a gold grade 8 bolt, I believe. Now, I
>>understand that grade 5 has a better shear strength than 8, and since
>>the job of a trackbar is lateral which puts lateral stress on this bolt,
>>would I be better off with a grade 5 bolt?
>>--
>>________________________________________________ ___________
>>tw
--
__________________________________________________ _________
tw
03 TJ Rubicon
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: probably from g. p. (abbreviation of general purpose)
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
http://www.7slotgrille.com/jeepers/t...ron/index.html
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
01-23-2004, 01:43 PM
#16
Guest
Posts: n/a
Re: Track bar and grade bolt?
I've heard from many different sources that the 8s are stronger but in a
lateral stress situation, they give out quicker than 5s.
Jerry Bransford wrote:
> A Grade 8's shear strength is still higher than a Grade 5. :)
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> N6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.***.net/jerrypb/
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:IFaQb.10809$sT7.7349@newssvr23.news.prodigy.c om...
>
>>I have an RE adjustable trackbar and am going to replace the bolt at the
>>frame end (not axle end). It is a gold grade 8 bolt, I believe. Now, I
>>understand that grade 5 has a better shear strength than 8, and since
>>the job of a trackbar is lateral which puts lateral stress on this bolt,
>>would I be better off with a grade 5 bolt?
>>--
>>________________________________________________ ___________
>>tw
--
__________________________________________________ _________
tw
03 TJ Rubicon
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: probably from g. p. (abbreviation of general purpose)
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
http://www.7slotgrille.com/jeepers/t...ron/index.html
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
lateral stress situation, they give out quicker than 5s.
Jerry Bransford wrote:
> A Grade 8's shear strength is still higher than a Grade 5. :)
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> N6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.***.net/jerrypb/
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:IFaQb.10809$sT7.7349@newssvr23.news.prodigy.c om...
>
>>I have an RE adjustable trackbar and am going to replace the bolt at the
>>frame end (not axle end). It is a gold grade 8 bolt, I believe. Now, I
>>understand that grade 5 has a better shear strength than 8, and since
>>the job of a trackbar is lateral which puts lateral stress on this bolt,
>>would I be better off with a grade 5 bolt?
>>--
>>________________________________________________ ___________
>>tw
--
__________________________________________________ _________
tw
03 TJ Rubicon
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: probably from g. p. (abbreviation of general purpose)
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
http://www.7slotgrille.com/jeepers/t...ron/index.html
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
01-23-2004, 02:47 PM
#17
Guest
Posts: n/a
Re: Track bar and grade bolt?
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
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
01-23-2004, 02:47 PM
#18
Guest
Posts: n/a
Re: Track bar and grade bolt?
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
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
01-23-2004, 02:47 PM
#19
Guest
Posts: n/a
Re: Track bar and grade bolt?
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
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
01-23-2004, 03:06 PM
#20
Guest
Posts: n/a
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
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
