rear knuckle upper spherical discussion
#24
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
Full bearing ball bush/ Mazda MX-5 Miata
#26
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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.
#27
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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
Full bearing ball bush/ Mazda MX-5 Miata
where are you guys getting your auroras? i found some auroras on aircraft spruce, but not the AIB or SIB series.
#30
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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.
#31
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
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
#32
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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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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 :(
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 :(
#37
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.
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 :(
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 :(
#39
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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.
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.
#40
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