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Coilover Thrust Bearings? #2706172
10/12/19 11:05 AM
10/12/19 11:05 AM
Joined: Sep 2006
Posts: 2,874
Sac, CA
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mopowers Offline OP
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mopowers  Offline OP
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Sac, CA
For those of your running coilovers, front or rear, do you use the thrust bearings with them? Are they useful? I'd imagine once ride height is set, there isn't must adjusting done afterwards, is there?

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Last edited by mopowers; 10/12/19 11:06 AM.
Re: Coilover Thrust Bearings? [Re: mopowers] #2706184
10/12/19 11:46 AM
10/12/19 11:46 AM
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Milwaukee WI
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TRENDZ Offline
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Makes setup much easier.
I put them in anything I work on.


"use it 'till it breaks, replace as needed"
Re: Coilover Thrust Bearings? [Re: mopowers] #2706187
10/12/19 12:01 PM
10/12/19 12:01 PM
Joined: Oct 2007
Posts: 3,332
New York
polyspheric Offline
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New York
If the coil just pushes against a flat surface, one end or both will try to rotate as the spring compresses, but not smoothly (unless it's greased!).
The bearing assures smooth rotation so momentary binding will not give you a false picture.


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Re: Coilover Thrust Bearings? [Re: TRENDZ] #2706189
10/12/19 12:03 PM
10/12/19 12:03 PM
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back in Georgia
dthemi Offline
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They're great, just remember to use the set screws, or jam adjuster. They let the spring adjuster rotate so easily, they can turn on their own from vibration.

Re: Coilover Thrust Bearings? [Re: dthemi] #2706218
10/12/19 01:48 PM
10/12/19 01:48 PM
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MI, usa
dvw Offline
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Unless your turning the adjuster with the weight on the suspension on it I see no need. I've never had any trouble moving them.
Doug

Re: Coilover Thrust Bearings? [Re: dvw] #2706224
10/12/19 02:13 PM
10/12/19 02:13 PM
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Posts: 3,096
Fulton County, PA
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CMcAllister Offline
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CMcAllister  Offline
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Fulton County, PA
I use them on everything.

On some applications I use light springs that require being substantially compressed to store some energy and hold the car at ride height. Takes some effort. Front springs are worse because of the spring rates, especially on A-arms. I don't like busting my knuckles or damaging parts. On an aluminum body shock with coarse threads, it helps reduce the likelihood of damaging or tearing up the threads or the adjuster.

And I use spring heights to adjust corner weights, ride heights, level, etc., so it's not usually just a set and forget deal.


If the results don't match the theory, change the theory.
Re: Coilover Thrust Bearings? [Re: polyspheric] #2706245
10/12/19 04:41 PM
10/12/19 04:41 PM
Joined: Dec 2003
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Trumussia
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jcc Offline
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Trumussia
Originally Posted by polyspheric
If the coil just pushes against a flat surface, one end or both will try to rotate as the spring compresses, but not smoothly (unless it's greased!).
The bearing assures smooth rotation so momentary binding will not give you a false picture.


Never really thought about that, haven't read about it or being discussed here.

But ir sure makes me wonder about the ramifications on valve springs, and in difference to OP and staying OT, i will not go farther, but would like to. work

Re: Coilover Thrust Bearings? [Re: dvw] #2706296
10/12/19 10:36 PM
10/12/19 10:36 PM
Joined: Oct 2007
Posts: 3,332
New York
polyspheric Offline
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polyspheric  Offline
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Posts: 3,332
New York
But the springs will try to rotate when the car launches; how do you know both L & R will move the same amount? Any friction increases the spring rate by resisting compression. IDK how much, but none is better than unknown.

Valve springs should have the same problem, but Spintron shows that gaps frequently appear in all places in high speed operation (we would prefer not!) so there is some cancellation when the parts separate momentarily. A tiny Lazy Susan under the lower collar would help, but those tiny needles won't stand the impact very well. At the upper collar is reciprocating weight, so not good either.


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Re: Coilover Thrust Bearings? [Re: polyspheric] #2706392
10/13/19 11:56 AM
10/13/19 11:56 AM
Joined: Dec 2005
Posts: 3,096
Fulton County, PA
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CMcAllister Offline
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CMcAllister  Offline
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Fulton County, PA
I like to use the bearings, but never considered this as another reason to do so. While all true, is the effect on the springs, and the application of force on the upper and lower platforms, significant enough to be concerned about? It's not like the springs are being run through such a large amount of movement relative to the travel available from free length to bind as valve springs are. A well sorted suspension has a relatively small amount of change to installed spring height during a run.

And of course, a jam nut or adjuster lock should be used to stop the adjuster from being turned by the force exerted on it.

If bearing kits on the shocks means this is one less issue to keep me awake at night, then I will add it to the list of benefits from using them.


If the results don't match the theory, change the theory.
Re: Coilover Thrust Bearings? [Re: CMcAllister] #2706537
10/13/19 09:15 PM
10/13/19 09:15 PM
Joined: Oct 2007
Posts: 3,332
New York
polyspheric Offline
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polyspheric  Offline
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Posts: 3,332
New York
The heaviest coil will rotate the least. In the same lbs./inch rate, the steepest pitch will rotate the most.

All springs "store" the same amount of energy when the car is at rest: it's the weight of the car. A long, weak spring continues to act as we want as the nose rises.
A very heavy spring may top out before the front shock or limiter is fully extended, and take the weight suddenly and very hard as the nose comes down.


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