Discussion
mrmr96 said:
Don't let Captain Muppet hear you saying that!!
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
There should be seperate internets for engineers and non-engineers.http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Everyone would be much happier
Captain Muppet said:
mrmr96 said:
Don't let Captain Muppet hear you saying that!!
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
There should be seperate internets for engineers and non-engineers.http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Everyone would be much happier
kambites said:
But that's the question - why do you think it's dangerous? What failure mechanism would cause it to fail where a normal bolt wouldn't?
With my admittedly limited knowledge of metallurgy i would suggest:-A SOLID bolt will be stronger than a 2 piece "Bolt" as it is SOLID
Theoretically there is no weak point in a SOLID bolt by its very nature.
Those things have a number of weak points that i can envisage, The flange on the back of the protruding front element and the collar that sits around the flange that sits behind the flange being the two obvious ones. Given that the flange will be of a smaller diameter than the collar this WILL result in an uneven distribution of pressure on the collar.
big_boz said:
With my admittedly limited knowledge of metallurgy i would suggest:-
A SOLID bolt will be stronger than a 2 piece "Bolt" as it is SOLID
Theoretically there is no weak point in a SOLID bolt by its very nature.
Those things have a number of weak points that i can envisage, The flange on the back of the protruding front element and the collar that sits around the flange that sits behind the flange being the two obvious ones. Given that the flange will be of a smaller diameter than the collar this WILL result in an uneven distribution of pressure on the collar.
Don't buy a Golf based car then, because that's exactly the mechanism that the OH's Octavia uses to secure its wishbones to the chassis. A SOLID bolt will be stronger than a 2 piece "Bolt" as it is SOLID
Theoretically there is no weak point in a SOLID bolt by its very nature.
Those things have a number of weak points that i can envisage, The flange on the back of the protruding front element and the collar that sits around the flange that sits behind the flange being the two obvious ones. Given that the flange will be of a smaller diameter than the collar this WILL result in an uneven distribution of pressure on the collar.
kambites said:
big_boz said:
With my admittedly limited knowledge of metallurgy i would suggest:-
A SOLID bolt will be stronger than a 2 piece "Bolt" as it is SOLID
Theoretically there is no weak point in a SOLID bolt by its very nature.
Those things have a number of weak points that i can envisage, The flange on the back of the protruding front element and the collar that sits around the flange that sits behind the flange being the two obvious ones. Given that the flange will be of a smaller diameter than the collar this WILL result in an uneven distribution of pressure on the collar.
Don't buy a Golf based car then, because that's exactly the mechanism that the OH's Octavia uses to secure its wishbones to the chassis. A SOLID bolt will be stronger than a 2 piece "Bolt" as it is SOLID
Theoretically there is no weak point in a SOLID bolt by its very nature.
Those things have a number of weak points that i can envisage, The flange on the back of the protruding front element and the collar that sits around the flange that sits behind the flange being the two obvious ones. Given that the flange will be of a smaller diameter than the collar this WILL result in an uneven distribution of pressure on the collar.
Would be interested to see some evidence to put into practice what has been said in "For" posts.
big_boz said:
Have these been tested to a similar standard to an OEM part then?
Who knows? And to be fair the same could be said of any non-OEM bolt used anywhere safety-critical in a car. I'm certainly not saying they're safe; I just can't see a reason to believe that they're not. It seems like a sound enough engineering solution to the problem to me; whether the implementation of that design is any good is obviously a different matter.
Edited by kambites on Thursday 29th November 11:49
doogz said:
aponting389 said:
the bolt isnt going to bend
Why? Can you actually explain, instead of 'just cos'?Ultimately this is just a bolt going through a hole slightly bigger than the diameter of the thread. Why would that make the bolt bend?
kambites said:
big_boz said:
Have these been tested to a similar standard to an OEM part then?
Who knows? If someone told you that a Wheel bolt made of Plastic was safe due to a number of "scientific" reasons that you don't understand, would you believe them?
I am not an engineer and i don't understand in any detailed way friction or pressure dynamics, so all i have to judge these on is my own experience, which tells me that something solid is stronger than something that isn't.
To your point, I know that a Skoda Octavia is inherently safe as it has been tested and proven to be as such, also i know that VAG invest millions in development in there own components and also in the testing of 3rd party supplied components.
If for instance these are deemed safe to use in Germany and are TUV certified, then this would convince me that they are safe to use in a car with my children in it......See what i mean?
kambites said:
Captain Muppet said:
mrmr96 said:
Don't let Captain Muppet hear you saying that!!
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
There should be seperate internets for engineers and non-engineers.http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Everyone would be much happier
I'm going to get such a massive hi-five when I tell the rest of the geek table about this post at lunchtime.
I dotnm think these are a great idea but remember, there are five of them to attach a wheel on, I am sure they arent going to start spitting wheels off left right and centre, wheel bolts are by design over engineered for the forces they encounter.
My 944 has Aluminim wheel bolts which are very light but after twenty years I would be more concerned about those than some brand new steel "wobble bolts", ditto all the classics running about, some may be runnign about on 50 year old bolts that may have been loosed, tightened or over tightened a thousand times.
My 944 has Aluminim wheel bolts which are very light but after twenty years I would be more concerned about those than some brand new steel "wobble bolts", ditto all the classics running about, some may be runnign about on 50 year old bolts that may have been loosed, tightened or over tightened a thousand times.
Captain Muppet said:
kambites said:
Captain Muppet said:
mrmr96 said:
Don't let Captain Muppet hear you saying that!!
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
There should be seperate internets for engineers and non-engineers.http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Everyone would be much happier
I'm going to get such a massive hi-five when I tell the rest of the geek table about this post at lunchtime.
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