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#1
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![]() Is there different types of polyurethane? We have some at work and I'm considering using it to make the wishbone bushes but want to make sure its the right stuff.
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#2
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![]() all i know is that the bushes have to be flexible & not too hard so that you dont get too much stress on the welds but i´d also like to know exactly what kind they´re made of because i´ll also be making them myself at work.
cheers |
#3
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![]() Polyurethane is sold by it's shore rating
80 or 90 shore should be ok. I have heard it said that this material can be difficult to machine. One thing I would say, my Poly bushes were definately injection moulded. ![]() Personally, I would not know as I have never tried to turn the stuff ![]() Heres a linky to the correct grade Polyurethane Bar
__________________
I am not a complete idiot...........Some of the parts are missing !! Ronnie ![]() www.roadster-builders.co.uk |
#4
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![]() It has been mentioned that freezing makes it easier to machine.
It is very expensive and is it worth the effort when they can be purchased with the sleeves for about £90. I am making my own and used UHMWPE,total cost about £30,including sleeves. |
#5
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![]() Hi, ive made my bushes from black delrin its probably harder than the poly bushes but i figured if some people use rose joints then a slightly harder bush should be ok
Quite happy if anyone wants to give me a valid reason why not. I paid £15 for 1metre of delrin and £3.50 for the four 300mm peices of 19mm stainless from the scrappy I have my own lathe so making them was easy for me (engineer 28yrs) Ray ![]() |
#6
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![]() There is no valid reason "why not" ,we are building on a budget and you get the I made this factor as well.
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#7
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![]() the reason not to use hard bushes is that there are alot of forces in all directions on the suspension so not only up & down but also forward & backwards & so if the bushes are too hard all that stress & force will go to the welds .
Cheers |
#8
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![]() raylee what speed do you turn them at i allso want to turn my own.
thwang |
#9
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![]() Hi there,
reading your reply on the bush material subject and would like to know what the UHMWPE material stands for and is it as good as poly bushes. cheers tony |
#10
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![]() Quote:
Here you go Tony A Bit of info & online shop I must admit, I had to find out when I read that ![]() ![]()
__________________
I am not a complete idiot...........Some of the parts are missing !! Ronnie ![]() www.roadster-builders.co.uk |
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