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PostPosted: Wed Mar 18, 2009 9:58 am 
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Joined: Sun Dec 14, 2008 4:38 am
Posts: 34
hi to all , i haveing a hard time to find bearings steel for mod my pedals , i need to find some new 3804 rs2 bearings before i can start to take them a take to get made new Titanium axle for them i was hope to get Full Ceramic Ball Bearings. a other thing would Ceramic hold to up in time to the side load,m there would alot, yes Ceramic is harder , that mean ez to crack, in some way from the hardness would any you know were i can find some or get costom made for me, in very low numbers, i could buy say max 6
3804 rs2 full ceramic or like a titammic bearings , for i guess there not goneing to be cheap :( .i have made new ti pins to hold the old steel claw, yes you guess it i got a New Titanium claws made for them too. i made new ti cleats, Too i very luckly i have one the best Au welders that work in Ti and mag welding for me, i upload pic late this week, i hope some tech God here help in this one thank you


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 Post subject: pedal bearings
PostPosted: Wed Mar 18, 2009 9:16 pm 
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Joined: Sat Jun 02, 2007 1:10 am
Posts: 1845
Location: Melbourne, Australia
I'll make some enquries for you. Full ceramics are very expensive though!


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 Post subject:
PostPosted: Wed Mar 18, 2009 9:33 pm 
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Joined: Sat Jun 02, 2007 1:10 am
Posts: 1845
Location: Melbourne, Australia
What pedals ae these for? 3804 seems very large (20x34x10)


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PostPosted: Wed Mar 18, 2009 10:21 pm 
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Joined: Sun Feb 06, 2005 4:22 pm
Posts: 3668
Location: Tucson, Az.
Full ceramics will be too brittle for that pedal. The design creates a big lever to push on the bearing, and I'm sure they wouldn't hold up.

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PostPosted: Wed Mar 18, 2009 11:26 pm 
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Joined: Sat Jun 02, 2007 1:10 am
Posts: 1845
Location: Melbourne, Australia
Ah didn't read all the title.....yeah I wouldn't use full ceramic for the vistas.
Ceramic races aren't too good with shock loading. The leverage on the bearings will be large so any bumps would likely crack the outer race.

I wondering if steel outer race and zirconia inner would work though. I don't know if that would work at all due to difference in co-eff of heat expansion. With the inner race being in compression it should fair better.


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 Post subject:
PostPosted: Thu Mar 19, 2009 12:05 pm 
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Joined: Sun Dec 14, 2008 4:38 am
Posts: 34
Phill P "What pedals are these for? 3804 seems very large (20x34x10)"

yes i found this bear not for nom use 3804 a odd bearing it "s big bearing, i only till i pull it apart think it use 2 kinds of bearing it may use a cone bear to help the side load with lose ball bearing ,


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 Post subject:
PostPosted: Sat Mar 21, 2009 1:49 pm 
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Joined: Sun Dec 14, 2008 4:38 am
Posts: 34
i had some time to take a few pic, i made some alloy cteats the fun , i can"t i find my rubber ducked to wight them i too poor to buy my wight thing, all i get it wight 1/2 the from the steel ones


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