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rear knuckle upper spherical discussion

Old 12-02-2014, 10:23 PM
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I believe Leafy is also specifically talking about getting Aurora branded bearings. I've used them in the past and they are very good. I don't know how the QA1 bearings from Summit compare.

--Ferdi
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Old 12-02-2014, 10:26 PM
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Originally Posted by ftjandra View Post
I believe Leafy is also specifically talking about getting Aurora branded bearings. I've used them in the past and they are very good. I don't know how the QA1 bearings from Summit compare.

--Ferdi
i think leafy is right, they are just rebranding them. their part numbering system and engineering data are identical. where are you guys buying auroras from?
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Old 12-02-2014, 10:32 PM
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Yes. The QA1, based on the part number and specs could very well just be a re-badged Aurora. But for like $10 more is impossible to beat the ABWT series for NHBB, especially if you're going to be experiencing axial loads.
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Old 12-03-2014, 02:30 AM
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Have you guys seen the Maruha spherical bearing set? You can see how they install them in the arms, basically looks like they are just pressed in. They mention alignment issues and a jig they have to verify correct positioning of the bearing.

Full bearing ball bush/ Mazda MX-5 Miata
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Old 12-03-2014, 03:17 AM
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This is the rear upright on my car, making a control arm change, but these work really well.
Attached Thumbnails rear knuckle upper spherical discussion-imag1173_zpsd74b29cb.jpg  
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Old 12-03-2014, 10:38 AM
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QA1's are definitely not Aurora. They're alright for the price, but just seem kind of cheap to me. I don't have personal experience running them, but our Baja team does without issue. I believe their spherical sizes are way over-designed, though. If your budget allows Aurora, I would stick with those. I believe it's the McMaster sphericals we tried also on our FSAE car, and they had a much much lower push-out force than the Aurora of the same size.
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Old 12-03-2014, 03:07 PM
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Originally Posted by Madjak View Post
Have you guys seen the Maruha spherical bearing set? You can see how they install them in the arms, basically looks like they are just pressed in. They mention alignment issues and a jig they have to verify correct positioning of the bearing.

Full bearing ball bush/ Mazda MX-5 Miata
no american retailers that i could find. those do look great though. i dont have time to wait on an engrish email and shipping from japan.

where are you guys getting your auroras? i found some auroras on aircraft spruce, but not the AIB or SIB series.
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Old 12-03-2014, 03:11 PM
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Google says a company called motion industries sells them. I know I can get them through Kingpin Machine too.

I wouldnt drop the $1200 on the murahahas, thats more or less what it would cost you to have Kingpin Machine make you a set using auroras.
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Old 12-03-2014, 03:12 PM
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We get them directly from a PO through Aurora. Though, we get a student discount through them, and that may not be the best price at full cost.
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Old 12-03-2014, 03:43 PM
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Originally Posted by Leafy View Post
Google says a company called motion industries sells them. I know I can get them through Kingpin Machine too.

I wouldnt drop the $1200 on the murahahas, thats more or less what it would cost you to have Kingpin Machine make you a set using auroras.
bitchin
https://www.motionindustries.com/pro...p?sku=02056567

yea the mahuras are really pricey, but i figure i could afford 2, if i could find them.
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Old 12-03-2014, 04:07 PM
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Originally Posted by hi_im_sean View Post
im bored out of my mind, so i made a highlighter cad drawing to help you guys understand what im talking about:


and having thought about it, you would obviously only have to do this on one retainer, the other can be permanently welded in.
i think itrs pretty self explanatory but
pink is miata knucle
blue is the bearing
green is the retainers
screws are orange in the fist, yellow in the last pic (and they would be countersunk to avoid conflicts between them and the ruca)
retainer plate on the last one is orange
Don't you know you're perpetuating a Miata stereotype by using PINK marker?!
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Old 12-03-2014, 04:23 PM
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Originally Posted by cordycord View Post
Don't you know you're perpetuating a Miata stereotype by using PINK marker?!
pink was intentionally used to illustrate the miata im glad someone picked up on that

now can anyone figure out why i used blue on the sphericals?


i called motionindustries, they drop ship from auroroa, ill have them wed or thursday next week. ill knock the sleeves out sometime between now and then, and hopefully slap it all together the following weekend.
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Old 12-03-2014, 08:35 PM
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Originally Posted by hi_im_sean View Post
now can anyone figure out why i used blue on the sphericals?
www.youtube.com/watch?v=p86BPM1GV8M
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Old 12-03-2014, 10:53 PM
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hail sagan! but no

bearing are ordered, you know youre getting good **** when they ask if you need certifications.
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Old 12-03-2014, 11:23 PM
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Originally Posted by hi_im_sean View Post
hail sagan! but no

bearing are ordered, you know youre getting good **** when they ask if you need certifications.
You get the same stuff, but they can charge you more.
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Old 12-04-2014, 07:06 AM
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Originally Posted by cordycord View Post
You get the same stuff, but they can charge you more.
i know, all i meant was the product is probably of high quality if certs are offered for it. theyre for things that fly. $7 ebay sphericals do not offer certs.

someone at work specified certs for a 1/4 turn fastener on accident. so now we pay $12, instead of $1.50. im still trying to get that reversed as i just ordered $1200 in fasteners that should have only cost $150 :(
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Old 12-05-2014, 02:24 PM
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Originally Posted by cordycord View Post
You get the same stuff, but they can charge you more.
Yep, no reason to get certs on anything unless its required.

Originally Posted by hi_im_sean View Post
i know, all i meant was the product is probably of high quality if certs are offered for it. theyre for things that fly. $7 ebay sphericals do not offer certs.

someone at work specified certs for a 1/4 turn fastener on accident. so now we pay $12, instead of $1.50. im still trying to get that reversed as i just ordered $1200 in fasteners that should have only cost $150 :(
The worst case I have seen at work was with a certain PLT fastener. This fastener is identical in every specification to a NAS counterpart. The PLT's have a much more involved certification process though, and get the letters "PLT" engraved into them instead of "NAS". The NAS fastener is $3.90 each. The PLT is $64.50 each with a quantity discount when you order 10000 of them. Think of the money saved if our company would have gone with the NAS fastener, considering there are over 800 of these fasteners on one wing, and the company plans on making many, many wings over time.
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Old 12-05-2014, 03:32 PM
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on one wing
And that phrase makes all the difference in the world.
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Old 12-05-2014, 03:47 PM
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Originally Posted by Dustin1824 View Post
Yep, no reason to get certs on anything unless its required.



The worst case I have seen at work was with a certain PLT fastener. This fastener is identical in every specification to a NAS counterpart. The PLT's have a much more involved certification process though, and get the letters "PLT" engraved into them instead of "NAS". The NAS fastener is $3.90 each. The PLT is $64.50 each with a quantity discount when you order 10000 of them. Think of the money saved if our company would have gone with the NAS fastener, considering there are over 800 of these fasteners on one wing, and the company plans on making many, many wings over time.
but see, at least you work somewhere that has airplanes, so that mistake would be easy(relatively) to make. i work at the post office our supply people are morons.
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Old 12-05-2014, 04:03 PM
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Originally Posted by hi_im_sean View Post
but see, at least you work somewhere that has airplanes, so that mistake would be easy(relatively) to make. i work at the post office
Haha, nevermind then. Unfortunately, it was not a "mistake" on our company's part. It was a situation where in a meeting they asked everyone to look for ways to reduce cost, so I did.

I found the PLT fastener price and said WTF, and began searching and found a direct NAS counterpart. When I presented the idea during another cost reduction meeting, a couple stress guys were opposed because "We have always used the PLT in this area", and therefore this idea was ruled out. We are literally throwing like $50k away every time we build a wing, because "That's what we have always done"

Anyways, I just used this for an example of how certifications will drive an insane amount of cost into parts.

/Rant
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