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Discussion Starter #1
I have searched on here to no avail, so I may do some more searching online later, but I am interested in buying some urethane rod and getting my machinist cousin to turn it down on a lathe so we can use them for knuckle bushings. I dont want to pay $100+ for 6 bushings from someone and in all honesty, its just the upper control arm to knuckle bushing that is giving us problems. We need to do both of mine and his on the Mark VIII(might require different dimensions, but we will check it out).

What kind of urethane do we need? Where is the best place to get this? Thanks
 

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The knuckles and bushings are the same on both the MN-12 and FN-10.

The upper bushing generally fails due to the slop in the rest of the LCA and Knuckle bushings.

You will also find out that just about every knuckle is a different width where the upper bushing goes.

Poly won't last, Delrin is the way to go, good luck.
 

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Delrin

Hello

I have delrin bushings in my Tbird race car. Love them.
They seem to hold up. Even the way I run my car.

DLF, made them. Great buy!

I am going to get his rear K bushings. I think they are worth the cash!!

:xpcool:
 

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Discussion Starter #5
Yes I would say thats expensive, lol. $186 for a foot. The reason I am asking is that I went to a plastic supply place in waco thats not there anymore and the guy went crazy on me when he asked who the engineer on the project was and I said "me." I couldnt tell him what kind of urethane to get. I was going to make a steering rack bushing for a lexus. He handed me a small piece for free that I could use and I said hmm this feels pretty firm, it should work good. I suppose I should have left then because he told me that I am playing with peoples lives and he snatched the piece of urethane out of my hand. I apologized to the guy and told him I would go find out what kind of urethane I would need.
 

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Well, it's not that expensive. I pay about $20/ft. for the Delrin that I use to make Knuckle bushings, but there is also the expense of the Mil-Spec hardcoated aluminum sleeves, the equipment, and the maching time.

If you're not going to get the best, Delrin, then just get stock replacement bushings.
 

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Well, it's not that expensive. I pay about $20/ft. for the Delrin that I use to make Knuckle bushings, but there is also the expense of the Mil-Spec hardcoated aluminum sleeves, the equipment, and the maching time.

If you're not going to get the best, Delrin, then just get stock replacement bushings.
+1; I'd buy a set, if it were me.

Machining plastics isn't easy.

We use a bunch of this stuff at work; the teflon filled delrin is even better for bushings. :)

That's what I'm making the stand and sliders for my three monitor eyefinity setup with; 8020, teflon/delrin, and steel. :) That's my project today...
 

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Discussion Starter #8
Well if I could get ahold of something usable and machinable for bushings for $20-50 or so it sounds like a winner to me. I just need to find out where. Then I can give my cousin a spare bushing and let him take care of the machining at his work (probably after hours of course, lol). Thanks for all the replies. I love this place.
 

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You're also going to have to make aluminum or stainless sleeves to go inside of the bushings. And, figuring out all of the proper dimensions took me quite a while. I'm not saying that you can't do it, after all, I did, but it's not a casual undertaking.

You might want to refer to my instructions on the installation of my Delrin Knuckle Bushing Kit to get an idea of what's involved.

I can make you a set of Delrin upper knuckle bushings for both sides, with plain, not anodized, aluminum sleeves, for $110 shipped (lower 48).

As I mentioned earlier, Ford wasn't consistent in manufacturing the knuckles, and I would require the widths of both of the upper knuckles, preferably in mm, in order to properly produce a set.



 

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Discussion Starter #10
Does the delrin squeak at all? Is that a grease zerk in the last pic?
 

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Does the delrin squeak at all? Is that a grease zerk in the last pic?
Mine are setup to be greased, just in case. None of my Delrin Bushings have ever made a sound.
 
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