UMI Control Arms with Roto-joints... now available
02-02-2010, 01:52 PM
#1
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UMI Control Arms with Roto-joints... now available
Upper On-car Adjustable: http://www.stranoparts.com/partdetai...D=99&ModelID=5
Poly/Roto-joint combination Lowers--
Lower On-car Adjustable: http://www.stranoparts.com/partdetai...D=99&ModelID=5
Lower Non-Adjustable: http://www.stranoparts.com/partdetai...D=99&ModelID=5
Poly/Roto-joint combination Lowers--
Lower On-car Adjustable: http://www.stranoparts.com/partdetai...D=99&ModelID=5
Lower Non-Adjustable: http://www.stranoparts.com/partdetai...D=99&ModelID=5
02-02-2010, 02:16 PM
#3
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Roto's are quieter, are able to be snugged up if they loosen a little, and are full rebuildable if you get to that point. Rod-ends can make noise and you junk them when they loosen up.
Functionally, what you have works the same way, this is just a "Better" rod-end so to speak.
Functionally, what you have works the same way, this is just a "Better" rod-end so to speak.
02-05-2010, 03:10 PM
#6
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The noise comes from play or slop in a joint--kind of a clunk. In fact much like a bad tie-rod or ball joint noise for the same reasons, sloppy fit.
Roto's allow you to tension the races against the center ball like you'd tighten an old type wheel bearing, hence the reason they are more quiet. Rod-ends and regular spherical bearings do not allow this. Essentially you have a ball and socket joint, the delrin are races the ball rides in, you want them hard to eliminate play--but you also want rotation to get rid of bind. These do both well.
Roto's allow you to tension the races against the center ball like you'd tighten an old type wheel bearing, hence the reason they are more quiet. Rod-ends and regular spherical bearings do not allow this. Essentially you have a ball and socket joint, the delrin are races the ball rides in, you want them hard to eliminate play--but you also want rotation to get rid of bind. These do both well.
02-06-2010, 11:43 AM
#7
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Join Date: Dec 2006
Location: Florida
Posts: 329
The noise comes from play or slop in a joint--kind of a clunk. In fact much like a bad tie-rod or ball joint noise for the same reasons, sloppy fit.
Roto's allow you to tension the races against the center ball like you'd tighten an old type wheel bearing, hence the reason they are more quiet. Rod-ends and regular spherical bearings do not allow this. Essentially you have a ball and socket joint, the delrin are races the ball rides in, you want them hard to eliminate play--but you also want rotation to get rid of bind. These do both well.
Roto's allow you to tension the races against the center ball like you'd tighten an old type wheel bearing, hence the reason they are more quiet. Rod-ends and regular spherical bearings do not allow this. Essentially you have a ball and socket joint, the delrin are races the ball rides in, you want them hard to eliminate play--but you also want rotation to get rid of bind. These do both well.
02-07-2010, 10:45 PM
#8
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I tried to address that, I guess I didn't do a good enough job.
Yes, these are quieter than rod-ends (which vary in how noisy they are based on how good they are to start with and how much the wear). Roto-joints can be tensioned to get rid of any play and that's where the noise comes from. Well, that and the metal bushings hitting the metal cage at the end of the rod-ends travel....
Yes, these are quieter than rod-ends (which vary in how noisy they are based on how good they are to start with and how much the wear). Roto-joints can be tensioned to get rid of any play and that's where the noise comes from. Well, that and the metal bushings hitting the metal cage at the end of the rod-ends travel....
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