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stainless steel cartridge freebody bearings

Old 09-05-19, 10:26 PM
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le mans
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stainless steel cartridge freebody bearings

i received new cartridge bearings for my fulcrum wheel set from an ebay seller in the UK
my question is how can you tell the difference to steel cartridge bearings?

is it only the ball bearings that are stainless steel or the whole unit? coz the casing is magnetic
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Old 09-05-19, 10:43 PM
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If the balls are stainless steel and the racers are steel then it seems counter productive, and i wasted paying a little extra for them **rolls eyes
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Old 09-05-19, 10:52 PM
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Leave them half submerged in water for a day or so and see if they rust.
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Old 09-05-19, 11:58 PM
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...if the bearings are greased ( and why would you choose to run them dry ? ), it's pretty hard for them to rust. Here is a link to bearing materials you may or may not find helpful. Personally, I find regular chrome steel bearings are plenty good enough for all my bicycle needs.
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Old 09-06-19, 12:43 AM
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I think stainless is a bit "softer".
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Old 09-06-19, 05:06 AM
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Some "stainless" (corrosion-resistant, technically) steel is somewhat magnetic.
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Old 09-06-19, 06:41 AM
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Originally Posted by dsbrantjr View Post
Some "stainless" (corrosion-resistant, technically) steel is somewhat magnetic.
Not quite. The grades of stainless steel used for bearing (and cutlery, tools, etc.) are 400-series and all of them are strongly magnetic. You cannot use a magnet to tell if the bearings are stainless steel or not.
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Old 09-06-19, 07:11 AM
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Originally Posted by AnkleWork View Post
Leave them half submerged in water for a day or so and see if they rust.
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Old 09-06-19, 07:14 AM
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Originally Posted by 3alarmer View Post
.
...if the bearings are greased ( and why would you choose to run them dry ? ), it's pretty hard for them to rust. Here is a link to bearing materials you may or may not find helpful. Personally, I find regular chrome steel bearings are plenty good enough for all my bicycle needs.

I know what to buy next time.. thanks, i think if i want an upgrade i'll go for the ceramics!

I had a choice - steel - stainless steel - ceramic, ya live and learn


She's in my freebody now and feels nice anyway
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Old 09-06-19, 07:24 AM
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Originally Posted by le mans View Post
I know what to buy next time.. thanks, i think if i want an upgrade i'll go for the ceramics!

I had a choice - steel - stainless steel - ceramic, ya live and learn .
You made the right choice. Ceramic bearings are a waste of money for bicycle use.
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Old 09-06-19, 07:32 AM
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Originally Posted by HillRider View Post
You made the right choice. Ceramic bearings are a waste of money for bicycle use.
I 'd go for the standard steel ones next time, cheaper ..and probably lasts as long

Last edited by le mans; 09-06-19 at 07:36 AM.
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Old 09-06-19, 08:13 AM
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By the time rust is the issue other bad stuff has likely happened already. Andy
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Old 09-06-19, 08:25 AM
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Originally Posted by HillRider View Post
You made the right choice. Ceramic bearings are a waste of money for bicycle use.
+1, the advantages of ceramic, high speed/temperature,
aren't relevant in bicycle service
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Old 09-06-19, 09:12 AM
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I seriously doubt any bearing is made in the Austententic (non-magnetic) series as those grades are not real hard.
I'd assume they are form the Martinsitic (magnetic) grades.

https://www.astbearings.com/bearing-materials.html
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