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sprocket carrier bearing - what/where to buy

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geewhizz
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sprocket carrier bearing - what/where to buy

Post by geewhizz on Tue 26 Apr 2016, 10:14 am

as they seem to vary in price from £4-16 can anyone suggest what to buy or brands to avoid? cheers
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liverpool_f_
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Re: sprocket carrier bearing - what/where to buy

Post by liverpool_f_ on Tue 26 Apr 2016, 10:47 am

Go with Koyo. I used them after being recommended by someone on here. No complaints. On the expensive side of your scale but only having to do it once is worth £10!
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ceejay
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Re: sprocket carrier bearing - what/where to buy

Post by ceejay on Tue 26 Apr 2016, 10:52 am

I ordered one here the other day:


http://www.ebay.co.uk/itm/200809732279?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Says they'll send either a Koyo, Kyoto or WM1 bearing so we'll see...
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eternally_troubled
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Re: sprocket carrier bearing - what/where to buy

Post by eternally_troubled on Tue 26 Apr 2016, 1:18 pm

I'm not convinced that the sprocket carrier bearing lasts very long whatever brand you buy...

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Re: sprocket carrier bearing - what/where to buy

Post by Guest on Tue 26 Apr 2016, 4:04 pm

I've fitted ball bearings to the sprocket carrier hub and front wheel bought here:

http://www.conrad.com/ce/en/Search.html?queryFromSuggest=true&search=Ball+bearings

After all, a ball bearing *is* a Conrad Bearing, so I thought I couldn't go far wrong.
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geewhizz
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Re: sprocket carrier bearing - what/where to buy

Post by geewhizz on Tue 26 Apr 2016, 10:38 pm

gents, thank you all again for the input. 

ET - how long do they usually last for you?
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geewhizz
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Re: sprocket carrier bearing - what/where to buy

Post by geewhizz on Tue 26 Apr 2016, 11:45 pm

can anyone confirm if the suffix 'uu' and '2rs' are interchangeable ie 6304-uu and 6304-2rs as they both seem to signify 'sealed on both sides.'

i've read that nsk are a decent brand - if so is this what i'm looking for? ( i think i put nsk or fag in my wheels) i'd imagine is hard to determine if they're genuine or not, however...

http://www.ebay.co.uk/itm/6304-20x52x15mm-DDU-C3-Rubber-Sealed-2RS-NSK-Radial-Deep-Groove-Ball-Bearing-/191734828544?hash=item2ca4494e00:g:dT4AAOSwu-BWQILI

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Re: sprocket carrier bearing - what/where to buy

Post by Guest on Wed 27 Apr 2016, 5:27 pm

http://www.engineerstudent.co.uk/bearing_numbers_explained.html
http://www.gizmology.net/bearings.htm

'2RS' = double sealed maintenance free

The following list has them all but unfortunately in German:

https://www.ekugellager.de/nachsetzzeichen-glossar-2

But I haven't found the meaning of 'UU' as yet. Did you?
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Beresford
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Re: sprocket carrier bearing - what/where to buy

Post by Beresford on Wed 27 Apr 2016, 11:19 pm

Werner Van der Straten wrote:But I haven't found the meaning of 'UU' as yet. Did you?
"Usually Unavailable" ? Rolling Eyes
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geewhizz
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Re: sprocket carrier bearing - what/where to buy

Post by geewhizz on Wed 27 Apr 2016, 11:30 pm

haha it would certainly appear that way beresford, 

after some dialogue today with the very helpful people from http://www.qualitybearingsonline.com/

I have learned that DDU is the Japanese reference for 2RS which also interchangeable with UU.

I picked up a koyo bearing for £7.81 inc postage which seems like a good deal. I didn't trust ebay on this occasion as i think it must be easy to pass off cheaper brands for more reputable brands.

i bought this - http://www.qualitybearingsonline.com/koyo-6304-2rs-deep-groove-bearing-15x42x13/

...and got 5% off as it was my first order

this page was helpful too http://www.gizmology.net/bearings.htm
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stormbringer
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Re: sprocket carrier bearing - what/where to buy

Post by stormbringer on Thu 28 Apr 2016, 5:51 am

geewhizz wrote:ET - how long do they usually last for you?

Now, that got me interested too. Can't recall the exact design, but I remember I wondered why they put a bearing there - afterall the rear sprocket moves in relation to the rim only very little. I may however have misunderstood the design...

Which brings us to wheel bearings. Lifetime on those?

I'm asking because I've never - as in ever on any vehicle I've owned over the years - had to change any wheel bearings.
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ceejay
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Re: sprocket carrier bearing - what/where to buy

Post by ceejay on Thu 28 Apr 2016, 9:27 am

I ordered one here the other day:


http://www.ebay.co.uk/itm/200809732279?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Says they'll send either a Koyo, Kyoto or WM1 bearing so we'll see...



It was a Kyoto fwiw...



ET - how long do they usually last for you?




My bike has done about 20,000 miles and I can feel a single notch in the sprocket carrier bearing so I'm replacing to be on the safe side while I've got the wheel out. I am assuming it's the original in there. All the wheel bearings feel fine.



Now, that got me interested too. Can't recall the exact design, but I remember I wondered why they put a bearing there - afterall the rear sprocket moves in relation to the rim only very little. I may however have misunderstood the design...

Which brings us to wheel bearings. Lifetime on those?

I'm asking because I've never - as in ever on any vehicle I've owned over the years - had to change any wheel bearings.




Same but I haven't owned too many vehicles to be fair. My car has done 96,000 and wheel bearings are all good. My previous bike I put about well over 20,000 of relatively hard miles (off road and numerous river crossings etc). I was always expecting the bearings to go at some point but they never did. However I ride bicycles too and I get through all bearings including wheels much faster. I believe this is due to the bearings being smaller to keep the overall weight reasonable (as it's only human powered!).
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ceejay
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Re: sprocket carrier bearing - what/where to buy

Post by ceejay on Thu 28 Apr 2016, 3:00 pm

It was a Kyoto fwiw...

... and the wrong size. Cool  I've been sent a 6204 (too small). The good news is once I got the old one out, it feels fine. Must have been something else making it feel slightly notchy..  scratch

May be also worth noting when I took the grease seal out it came out with such force it bounced off my garage walls/roof 2-3 times!! Will be careful with my eyes next time  Shocked
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geewhizz
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Re: sprocket carrier bearing - what/where to buy

Post by geewhizz on Thu 28 Apr 2016, 3:31 pm

That might be the bearing for the drum model,  I believe there are different sizes for disk and drum. Possibly still worth adding a new one as you have the old one out already.
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ceejay
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Re: sprocket carrier bearing - what/where to buy

Post by ceejay on Thu 28 Apr 2016, 4:27 pm

Yeah good point, that could explain it because the ad simply says it's a  sprocket carrier bearing for all the CB500's with neither me of them realising there could be different sizes for drum/disc models. Oh well I'll see what they come back with. I already put the old one back in because I need to ride the bike but I will get a new one in there as soon as I get it plus a new grease seal as the one I took out I've knackered the internal spring clip thing.
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eternally_troubled
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Re: sprocket carrier bearing - what/where to buy

Post by eternally_troubled on Sat 30 Apr 2016, 6:15 pm

I'm afraid I can't tell you quite when I did it, but it looked like this:



It must of been about 4-5 years ago. I was replacing the rear wheel bearings and noticed this - had to replace it too!

Now, I'm pretty sure that either my rear wheel bearings or the sprocket carrier is knackered again (now, April 2016) - I can move the rear wheel from side to side a bit and I got an advisory on my MOT before Christmas, so I'd say they probably only last a few years.

I will update you when I change the bearings if it is actually knakered or just the weel bearings that haven't lasted.
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skyrider
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Re: sprocket carrier bearing - what/where to buy

Post by skyrider on Sat 30 Apr 2016, 8:32 pm

that sprocket does look a bit past its sell by date Laughing

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