07-19-2013, 09:39 AM #1
Why you should check your supercharger bearing often !!!
Pulled my XXX out to day to noticed more play than normal ...
The Bearing are FAG C3 same as OEM but steal cage ..
It had done about 12 hours of ocean bashing ..
The Bearing cage on the gear side facing inward had separated , how it didn't fall apart ... got me ..Just sooooo lucky ...
In the Back ground you can see the broken cage .. No damage to wheel ..
Left bearing you can see cage separating and the right bearing is fine (front bearing )...
07-19-2013, 09:45 AM #2
07-19-2013, 09:46 AM #3
Well I know you guys are gonna tell me you love the metal cage, but I stoped useing them and went back to the OEM bearings. The metal cage just doesnt like the speed like the polymier cage. This is my opinion ofcoarse. I had two SCers fail because of SKF metal cage.
I agree with you for sure we need to pay attention to are SCer's like every 15hours or so. I mean hell we love to tinker with our ski's and know how. So why not. My 65hours 2010 TX 260 SCer took a shit and caused all sorts of havok. OH boy and seadoo states 200 hour intervals....No way!
Glad you caught it.
07-19-2013, 10:15 AM #4
I went steel cage as I had failure with the polymer cage ..
But back with the Little ET 127 SC on my S3 RXTX , I run the little beast cause of the low issues ...
But the XXX got 80mph + and the little ET 76.6 ...
I rather be slower and be reliable .
07-19-2013, 10:18 AM #5
OEM bearings only.......... I replace every year reguarless..... id rather spend a little on new bearings than to have a issue
07-19-2013, 10:52 AM #6
Never had a problem with SKF C3 bearings, yet. I have had problems with the plastic cage melting though.
Those bearings, both look like they were pretty hot.
Maybe the installion method is different that we use.
Talked to who I believe is a good bearing guy, since all he sells is bearings and seals. Said there is no metal bearing or plastic caged in this size that is rated to handle the rpms we are turning the SCers. Ceramics can handle the rpms but can't handle the environment we run the bearings in. So, basically you are always going to have problems sooner or later.
07-19-2013, 11:04 AM #7
- Join Date
- Sep 2009
There is one thing to consider. The "C3" designation has to do with the amount of play in the bearing. C3 is looser than standard bearings, because of the high rpm, the bearing heats up and tightens the clearance. In your charger, you may be overloading the bearing due to expansion, causing the bearing to get an interference fit. It may be appropriate to use a C4 or even C5 bearing in the high-output chargers for this reason. (as the number goes up, clearance goes up...)
Somebody willing to test this out? Going to the higher clearance should help the polymer falling apart from heat as well.
07-19-2013, 11:16 AM #8
- Join Date
- Jan 2009
- Scotland, UK
07-19-2013, 12:57 PM #9
07-19-2013, 02:11 PM #10
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