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PostPosted: Sun Mar 16, 2014 12:02 pm 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
Morning all,

I hope everyone is well after celebrating Ireland win in the 6 Nations!!

Back to bike matters - as I am sure you have noticed, I have been having some difficulties with pedals recently - I have not obtained a pair of MKS quill pedals for my Gazelle - they are in reasonable condition but need a tidy up. (a pic, as i know people love pics!)

Image

Nothing special but I like them and they seem to need minimal work. This minimal work includes rebuild and regrease. I would also like to replace the bearings and from what i have read, when you take something apart to regrease it (wheels etc) it is best to change the bearings. So, my query (ies) -

What are the best bearings to use?
They are about 4mm in diameter - what size is this in the bearing world?

I have seen various 'grades' but cannot work out what i need and I suspect I will need to buy a few as i have quite a few pedals which need rebuilt. I would like to order 400 (ish) at minimal cost.

Any info, hints, tips, links etc would be appreciated.

Thanks all, I hope your weekend is going well,

Richard


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PostPosted: Sun Mar 16, 2014 12:57 pm 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
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Location: Norn Iron
Back -

In an effort not be appear to be lazy, I had a look here -

http://simplybearings.co.uk/shop/Loose+ ... index.html

I am none the wiser!

Richard


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PostPosted: Sun Mar 16, 2014 1:24 pm 
Old School Hero

Joined: Wed Oct 24, 2007 10:33 am
Posts: 209
Location: YORK
I bought some loose balls from that company, 100 grade which seemed lovely when installed. They were a very helpful - I reckon if you were to send them a sample they would be able to match it easily. Prices are good, too - I did try a local bearing suppliers but for anything a bit out of the ordinary they were terribly expensive - about 30x dearer!


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PostPosted: Sun Mar 16, 2014 1:37 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 9346
Location: Cumbria
Generally the balls are more robust than the races. If the races are ok then logic would say the balls are too. Personally I would clean and grease them :)

Shaun.

Ps. Nice choice with the sylvan. Classic design which they still make today


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PostPosted: Sun Mar 16, 2014 2:48 pm 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
Thanks Julian and Shaun.

Could you explain what 100 grade means?

Shaun, you are somewhat right - and it is the cheapest option to clean them etc but from what i have read, balls wear and it is supposed to be a cheap swap. I keep reading things that say 'cheap option' or 'negliable cost' - and every time it never works out that way.

The pedals are nice and in reasonable condition too - i did want SR to match the seat post, bars and stem but these will be fine.

Thanks all,

Richard


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PostPosted: Sun Mar 16, 2014 4:02 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 9346
Location: Cumbria
Ball bearings are graded for how round they actually are, grade 100 is actually pretty good, I think grade 25 is the best I have ever come across.

Grade 100 would be more than OK for bike use, the higher the number the worse they are.

If memory serves they are 1/8 the inch and not metric.

Shaun


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PostPosted: Sun Mar 16, 2014 4:17 pm 
Old School Grand Master
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Location: Norn Iron
I am struggling to find that grading on this site -

http://simplybearings.co.uk/shop/Loose+ ... index.html

am i missing something?

Richard


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PostPosted: Sun Mar 16, 2014 4:30 pm 
Old School Grand Master
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Location: Cumbria
Strange, I can see lots of 100 grade on that site, did you mean 25 grade? You would have to find a specialist supplier of precision balls for those I guess.

Shaun


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PostPosted: Sun Mar 16, 2014 4:56 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
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Location: Cumbria
Just and a look and sjs do 100 grade and 25 grade 1/8 the ball bearings, now having a mental block on the size :) was it 3/16ths?

Shaun


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PostPosted: Sun Mar 16, 2014 5:02 pm 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
Posts: 3775
Location: Norn Iron
Shaun,

I will have to mention this again - i do need glasses! I see the grade now - I had been looking at Stainless 316 but could not see the blatantly obvious grade in front of me!

Apologies for that,

Richard


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