Quote:
Originally Posted by Shawn D.
FYI, polyurethane is a plastic.
The use of elastomeric polyurethane for vehicles is not news to me, so I don't need to Google anything. I have elastomeric polyurethane sway bar bushings on three cars, suspension bushings on two (including subframe bushings on one), and engine & transmission mounts on one. I also have Johnny Joints on my BMW's thrust arms (not that these are relevant to this discussion).
You essentially admitted my point on the wheel spacers when you said "I wanted some play with my motor trans and steering so I got poly." That's the issue -- there would be deformation and play.
Elastomeric polyurethane is what is required for the load-bearing items we're talking about, which AFAIK is not 3D-printable with current materials/equipment available to the masses. If the "urethane" the OP is using is indeed elastomeric polyurethane, then I'm wrong.*
*Except for the wheel spacers
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I know poly is a plastic... I was just making sure the guy who said you cant make spacers out of plastic knew I was talking about polyu which is a specific kind incase he didn't understand what type we were talking about.
And the fact that it "has play" does not mean its deforming. It simply means that on a very small scale it has give. Just like all metals do. Its just poly mounts have a little more give than metal mounts.
I don't see any reason why the spacers ive seen on 4x4 trucks couldnt be made by simply taking a disc of poly and drilling it. As long as you drill accurately so it isnt off center I don't think the load would be that great. You only torque wheels down to 80-90ftlbs. As long as it doesnt crack and shear off in pieces it should be ok.