Thank you, that video is really helpful.. I'm about to do the same with new skf bearings unless I found skf ready bottom bracket in a good price.. We have an skf shop in the area and used to do similar upgrades for skateboard wheels.. Good times :)
get a hold on 7805-LLB (but a LLU will do just fine) bearings these bearings are the angular version of the 6805 more suited for hubs compared to the deep grove radial, they cost a bit more, but they'll last forever (if properly installed); don't bother going ceramic cause your hub is not spinning at jet engine rpm levels
The video is 5 years old but I'll comment. The BB52 has a lifetime between 4500-5500km. The reason why Shimano says "Do not disassembled" on the bottom bracket is important. It's not because they want you to buy another. This thing costs $20 and it's cheap. It's mainly because the cup on each sides become fragile once you remove the bearings to replace them with another. Shimano does not even provide bearings for it. You need to buy from third parties. What you can do is to remove the plastic and seal covers to clean, regrease and put back. I will not recommend renoving the bearings.
its fine to replace the bearings . i replace them with original spintech bearings that compatible with shimano bb52 works fine , just a bit pricy than the normal bearings but it is japan made so it sturdy af .
Interesting. The problem is that filing the original plastic sleeve to fit the extra mm of the bearing let the sleeve rub also on the external part of the bearing ( that is fixed and doesn't rotate) and not only on the internal part (that rotate)
You just using disassembled old bearing external ring for help pressing new bearing, and not cause internal damage in new bearing. Don't forget using Grease and freezing new bearing in they process
I imagine it would work better if: 1) you applied a thin layer of grease to the inside of the cup before pressing in the new bearing 2) you minimized the heat transfer between the cold bearing and the hot cup. Make it quick.
No you have to do it to the cup and bearing separately, you won't get reliable heating or cooling if the bearing is pressed in already. You also don't have to go so hot 100 degrees centigrade is more than enough
will try doing this with an FSA Mega EXO 6000/8000. Are the original bearings only 6 mm wide? That's why u need to file the little inside rim on the plastic seals?
Anything heavy like marine grease or red rubber grease, the Bb is A low speed high load component so rather go for A thick grease park tools' Grey grease should also be good (don't know the part number) good luck
Freeze bearing, heat cup with torch, bearing will drop right in.
Thanks for your video.
Pressing the Bearings in with an Exposed Vice👍👍
Thank you, that video is really helpful.. I'm about to do the same with new skf bearings unless I found skf ready bottom bracket in a good price.. We have an skf shop in the area and used to do similar upgrades for skateboard wheels.. Good times :)
get a hold on 7805-LLB (but a LLU will do just fine) bearings
these bearings are the angular version of the 6805 more suited for hubs compared to the deep grove radial, they cost a bit more, but they'll last forever (if properly installed); don't bother going ceramic cause your hub is not spinning at jet engine rpm levels
This is a bottom bracket rebuild - has nothing to do with hubs.
The video is 5 years old but I'll comment. The BB52 has a lifetime between 4500-5500km. The reason why Shimano says "Do not disassembled" on the bottom bracket is important. It's not because they want you to buy another. This thing costs $20 and it's cheap. It's mainly because the cup on each sides become fragile once you remove the bearings to replace them with another. Shimano does not even provide bearings for it. You need to buy from third parties. What you can do is to remove the plastic and seal covers to clean, regrease and put back. I will not recommend renoving the bearings.
its fine to replace the bearings . i replace them with original spintech bearings that compatible with shimano bb52 works fine , just a bit pricy than the normal bearings but it is japan made so it sturdy af .
Interesting. The problem is that filing the original plastic sleeve to fit the extra mm of the bearing let the sleeve rub also on the external part of the bearing ( that is fixed and doesn't rotate) and not only on the internal part (that rotate)
I found it easier to remove the covers using a utility blade. Using a flat head was not working for me.
Didn't work for me as well, cracked the dust cap
You just using disassembled old bearing external ring for help pressing new bearing, and not cause internal damage in new bearing.
Don't forget using Grease and freezing new bearing in they process
I imagine it would work better if:
1) you applied a thin layer of grease to the inside of the cup before pressing in the new bearing
2) you minimized the heat transfer between the cold bearing and the hot cup. Make it quick.
the biggest issue is those damn plastic sleeve, not steel bearings
I just regreease the bearings once a year it's much easier and safer for BB cups
Thank you for this video :)
If you spec a MR2437LLB bearing then you can sack off the useless plastic spacers mate
Back in the day finding those locally was near impossible but doing it often nowadays
is the freeze and heat method will work on removing the old bearing?
will it ruin the cups metal structure?
No you have to do it to the cup and bearing separately, you won't get reliable heating or cooling if the bearing is pressed in already. You also don't have to go so hot
100 degrees centigrade is more than enough
will try doing this with an FSA Mega EXO 6000/8000. Are the original bearings only 6 mm wide? That's why u need to file the little inside rim on the plastic seals?
Yes
should have used wood on the vice jaws ekse bru
is 6805 bearing fit in bottom bracket which has earlier 24377 2RS01 bearing
do you use 6805 with std width 7mm instead of 6mm?
If you can't find the 6mm one the 7mm will work fine but you'll ha e to sand the back of the plastic spacer flat
so good!!! thanks
6805rs bearings or just 6805?
6805rs , the RS stands for rubber seal , i think just A plain 6805 would not have seals at all or just metal shields
JustFrana thankyou for the info
grease ?
Anything heavy like marine grease or red rubber grease, the Bb is A low speed high load component so rather go for A thick grease park tools' Grey grease should also be good (don't know the part number) good luck