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Author Topic: Material Strengths  (Read 6360 times)

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Online fabr

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Re: Material Strengths
« Reply #30 on: January 10, 2012, 01:22:57 PM »
OOPS! No,sorry. Thanks tho!
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Online fabr

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Re: Material Strengths
« Reply #31 on: January 10, 2012, 01:54:53 PM »
Material won't be prohibitive. The small prototype quantities will suck tho.
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but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Online fabr

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Re: Material Strengths
« Reply #32 on: January 12, 2012, 06:03:15 PM »
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline BDKW1

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Re: Material Strengths
« Reply #33 on: January 12, 2012, 08:58:43 PM »
The really impressive part is that it is only 53RC..........
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Re: Material Strengths
« Reply #34 on: January 12, 2012, 09:07:58 PM »
It's the same material that some of the most expensive valve springs have been made from for 30 or 40 years. Very flexible with tremendous strength in torsion. Ya,53RC,hard to imagine.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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Offline dsrace

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Re: Material Strengths
« Reply #35 on: January 13, 2012, 11:35:42 AM »
with out looking it I am going to have to ask what is 53rc?
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Re: Material Strengths
« Reply #36 on: January 13, 2012, 12:43:08 PM »
53 Rockwell C scale. Steel strengths go up the harder they are. BUT ,at the price of brittleness. A 53 RC is a fairly mid range hardness with VERY high tensile and yield strength. That is what makes it such a fantastic material for super high performance valve springs and such .
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Double D

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Re: Material Strengths
« Reply #37 on: January 13, 2012, 02:40:38 PM »
I have a lot of real world experience with those to materials in Axel shafts don't know if it will help.  I do a lot of rock crawling and we use 4340 shafts and break them quite a bit also the input shaft in the  auto tyranny's we run.  we twist the splines on the Axel shafts so bad they get to where you have a hard time pulling them.  Went to 300M input and Axel's and two years later with a lot of running on them they still look the same as when I put them in.  The only problem is now I break Dana 60 ring and pinons insted of Axel's.  The owner of CTM Axel's is Jack and he could be of help on finding a supplier for this material.  don't know in your case but in a 35 spline Axel is around 1 3/4"  and the 300M is about 30% stronger. I think a lot is in the fact that it Twists; loads up with out breaking.  The stub Axel's in the front are only about 6" long they are the ones we break the most.  Hope this was helpfull.
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Re: Material Strengths
« Reply #38 on: January 13, 2012, 03:55:01 PM »
Real world experience will always trump books.  ;) ;D  Ya,the addition of a trace amount of vanadium and a bit more silicon added to 4340 making 300M makes a world of difference from what I see in mechanical properties. Your real world experience backs it up. This shaft is pretty puny in dimension,roughly equal in size to an automatic tranny input shaft. The short shafts that you are currently breaking makes sense due to the lack of length to twist in,effectively concentrating the load over a shorter distance increasing the stresses it sees.  I mention this because in my situation I do have the option  now by making this shaft from scratch. I am able ,with a very small mod to one of the sprockets,increase the shafts length between splines from 5" to 7" allowing  much greater torsional flexibility.
  You are right ,finding this stuff will be a bit tough. I find only about 5 sources listed. Haven't had time yet to contact them. Any contact info on Jack? Friend of yours?
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Online fabr

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Re: Material Strengths
« Reply #39 on: January 13, 2012, 04:41:26 PM »
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline BDKW1

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Re: Material Strengths
« Reply #40 on: January 13, 2012, 07:15:50 PM »
A 300M shaft will twist less than a stock shaft under the same load. It will also twist farther than a stocker before it breaks, it will just take a lot more torque to do it. I see nothing wrong with the ad........
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Re: Material Strengths
« Reply #41 on: January 13, 2012, 10:53:08 PM »
About 10 years ago I shattered a shorty PG planetary output shaft from TCI. They HT their shafts to a higher RC or at least they did then. Also with the idea of making a more torsionally stiff shaft. That didn't work out so well. They replaced it though,no questions asked after they looked at it. There are MANY different ways to HT 300M giving huge differences in final properties. Been doing a bunch of research on this the last few days.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Online fabr

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Re: Material Strengths
« Reply #42 on: February 05, 2012, 04:08:30 PM »
Well,finally decided ,for a multitude of reasons, to go with this choice.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"
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