Rubber bush - OEM testing requirements
Rubber bush - OEM testing requirements
(OP)
Can someone guide me in the test procedures recommanded by an OEM before accepting a RUBBER BUSH for suspension.
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Contact USThanks. We have received your request and will respond promptly. Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting Guidelines |
Rubber bush - OEM testing requirements
|
Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.
Here's Why Members Love Eng-Tips Forums:
Register now while it's still free!
Already a member? Close this window and log in.
RE: Rubber bush - OEM testing requirements
2) on vehicle durability test to whatever standard they use - typically no gross failure after the equivalent of 5 or 10 or 20 years life, depending on the manufacturer.
3) Static and dynamic stiffness within spec at defined preloads, frequencies and strokes
4) ultimate strength
You probably need to identify what sort of bush you are talking about, and what market.
Cheers
Greg Locock
RE: Rubber bush - OEM testing requirements
Can u send some information regarding mud water test. this is for japanese market.
Regds.,
Shivkumar
RE: Rubber bush - OEM testing requirements
Cheers
Greg Locock
RE: Rubber bush - OEM testing requirements
I was in one of the hotrodder forums where someone was considering replacing his rubber bushings with some of the more rigid aftermarket offerings. Another poster suggested a cheap alternative: Drive large nails into the rubber bushings.
Hey, whatever works! (Wonder if there's an SAE spec on the size and number of nails.)
RE: Rubber bush - OEM testing requirements
If you use superglue to hold the nails (well, we'd call them pins) in you can usually get 10 miles or so out of them, enough to measure the response anyway.
More sophisticated bushes have rate-plates in them, which are pretty much the same idea, but durable.
Cheers
Greg Locock
RE: Rubber bush - OEM testing requirements
A fellow wanted more roll stiffnes, but couldn't find an aftermarket sway bar for his car. The suggested solution was to find another stock bar at the salvage yard, chop out the working portion, and weld it to the bar in the car.
Okay, Greg, let's see you come up with a rational application of that idea!
(Sorry to sidetrack this thread, but I had to have some fun with Greg.)
RE: Rubber bush - OEM testing requirements
I had a link pin front end VW beetle (1963 model from memory) which i extensively hot rodded many years ago.
To increase front roll stiffness on a budget, I obtained a second anti roll bar from a wreck.
The original anti roll bars were fitted to the lower trailing arms with two clamps per side that clamped rubber to the bar and the arm.
I cut some rubber out to make room for the two bars, but with a tighter fit, banged the clamps over the two bars, then drove it for about 100,000 miles. Doubled the effectiveness of the anti roll bar, cost about 2 hours time, durability, virtually for ever. NHV, probably louse, but on a very hot rodded 1963 beetle, who could tell among all the other noise and harshness.
Regards
pat pprimmer@acay.com.au
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Rubber bush - OEM testing requirements
Over here, Greg, we call that "American ingenuity." Would you call that sort of thing "British grit," or did that term apply only to the London blitz?
RE: Rubber bush - OEM testing requirements
Welding the two sta bars together is horrible, but it might well work. Obviously the heat treat would suffer at the weld, so it might take on a bit of a twist or fail in fatigue.
One car I worked on had very awkward access for the sta bar, so the mechanics cut the main part of the bar out and welded flanges on. Then they could change the sta bar stiffness just by bolting on new bits of bar between the flanges.
Cheers
Greg Locock
RE: Rubber bush - OEM testing requirements
As for the welding of the sway bars, you're absolutely correct, of course. But, that's the point. With all our education, we wouldn't consider doing such a thing, and, as a result, we sometimes miss the opportunity to incorporate a "fix" which actually works!
(Now this thread is really side-tracked! That's what happens when an old man gets to rambling. Again, sorry.)