eaglos

Good day.

Just like the title says, I am looking for a square tapper JIS BB with removable
cartridge bearings. The BB will be matched with either o Sugino or a Shimano
crank on an 1x6 project. Cost is out of the equation for the time being, rider's
weight is around 88kg

Thank you

prooftheory

Did you have a question? If you want to know where to purchase one I suggest google. You do need to know which crank you are going to use because it makes a difference to the spindle length. The rider's weight is completely irrelevant.

eaglos

Crank will either be Sugino or Shimano but we have not decided on the a specific model yet.
Right now I am just looking for brand suggestions (not where to buy) that fit the above criteria.
I have only dealt with external bottom brackets so I have no idea what's the deal with square
tapper brands. Google gives anything from no name chinese to overpriced rebdged stuff.

gregjones

JIS BBs can be had for under $20. Why would you mess with replacing the bearing in one???

Just get a sealed cartridge bottom bracket.

The Shimano UN26 has a plastic left side cup, I would stay away from that. Other than that, most are rebranded and all so close to the same you won't be able to tell the difference.

As PT said, you will have to decide what cranks you will use.......they determine the spindle length.

prooftheory

I've seen people recommend IRD in here as sufficient and cost effective. People tend to go for Phil Woods for bling.

eaglos

@gregjones
I prefer to throw away a set of bearings than a sealed bottom bracket.
Also, I tend to buy stuff that can be maintained so I avoid the whole
"sealed/black box" components that you just have to throw them away.
On my external bottom brackets I repack the bearing every year rather
than buying new bb cups and throwing away the old ones that "broken".

@prooftheory
IRDs are made by Tange, I have seen them both but I cannot figure out
if you can pull their bearings out. Examples that you can do that are the
BB from White Industries, or the ones made by Sampson, Epic Reasearch
and Design etc.

TejanoTrackie 

OP - You are mixing metaphors here. By definition, cartridge bearings are not meant to be serviced, and they will last for years or even decades before needing replacement. If you have some OCD that requires you to constantly service and overhaul your bike, then just get a traditional open bearing BB, which will be easy to service and adjust.

Soo__Fuego

By you saying you "repack bearings every year" on a outboard/external BB I'm assuming you're doing it to Shimano type? Like this?

https://forums.mtbr.com/drivetrain-sh...cs-497220.html

Anyways, they don't really make BBs like that for Sugino/Shimano track cranks. Like TejanoTrackie already said just geta a Hatta Swan, Sugino 75 or Shimano/Dura Ace open bearing BB and service that. Btw you will need an ISO, not JIS for Sugino/Shimano track cranks.

prooftheory

Maybe OP should consider SRAM Omniums or S300s rather than Sugino/Shimano, since they have an outboard BB. It has never even occurred to me to try breaking open the cup on them so I have no idea whether this would work.

Somebody here claims that GXP BBs can be serviced in this way.

When did there get to be a bicycles stackexchange?

Leukybear 

Philwood makes one but $$$, note 3 $'s.
But you do indeed get what you pay for.

gregjones

Yet another very good reason for doing things in order.

1) Buy crankset.
2) Buy BB.

fietsbob

Phil

eaglos

@TejanoTrackie
By "serviced" I mean replaced. All my wheels have cartridge bearings and I do replace them
when the time comes and no they do not "last for decades". A pair of SKF bearings on my
mtb wheel died after 5.000kms, another set of Koyos lasted 10.000kms and so on. Loose
ball bearings are out of the question, for me it is way easier, less time comsuming and
less stressful to deal with a set of cartridge bearings every 10.000kms rather than
overhauling hubs/BBs every now and then to check if the grease is in place and if
hub/cones/cups are damaged.

@Soo_Fuego
More or less like shown on that link. I remove the plastic cover, clean and regrease. I am
not looking though for that type of bottom bracket for the Sugino/Shimano crank. I am
looking for something similar to this, this, etc.
---

I don't quite follow on the "Sugino = ISO" comment. I only see Sugino's SG75 and some
vintage Super Mighty track cranks requiring ISO spindles. What am I missing here? Did
you mean that only those types of cranks are "appropriate" for a single disk front on
1x6 setup? Will a modern Mighty Comp (130 bcd, JIS) not work with the aforementioned
setup?

Thank you all for your answers and you time and please excuse me if any of my writtings
seem offending, it has been a while since I wrote in English.

GENESTARWIND

step one:decide on crankset
step two:decide on bottom bracket


cant really give advice or opinions on a bb if we dont know what its being paired with.

Soo__Fuego

This is the Sugino 75 BB .......... Notice it says ISO?
https://www.tracksupermarket.com/inde...roducts_id=184

Grand Mighty and Shimano DA will also use the same ISO 109mm BB. Not JIS, the lower end Sugino like the RD2 use JIS if I'm not mistaken, but not the 75 or GM.

Others have already mentioned the Phil Wood BB ....... get that, but you will not service those bearing.
https://www.philwood.com/products/bbpages/ssbb.php

eaglos

@Soo__Fuego
I think you are referring to older Sugino Mighty's, the ones with 144 BCD.
This is the current Sugino Mighty Competion and it says JIS.

The whole get crank first and BB later has to do only with the ISO/JIS standard
or with the spindle length? I am asking because a couple of brands that I have
checked offer lengths from 103mm to 122mm in 3mm increments. What again
am I missing here?

GENESTARWIND

I'm running a velo orange grand cru bb, even though I've only been riding it for a few weeks, like it so far.

Don't know if it's rebranded or what but it felt solid and well made but non serviceable i believe. They are offered in multiple spindle lengths and French, English and Italian threading and threadless.

prooftheory

I have a hard time imagining that the difference in cost between two sets of sealed bearings and the cost of a full bottom bracket would ever be worthwhile.

For the crank you linked to you need a 103mm JIS BB.

ThimbleSmash

Sorry but,
If Shimano crankset then buy suggested Shimano bottom bracket.
If Sungino crankset then buy suggested Sugino bottom bracket.

Could it be any simpiler, I did the following and I have to say it works pretty damn good.

eaglos

Well, a set o Koyo bearings cost 8-10 Euros and will easily give you 10.000km. With
that money you only buy junk BBs like the UN-26 (had three, lasted 200, 280, 320km).
I would have to spend 20 Euros (twice as much for the Koyos) to get better stuff like
the UN-55 but we (co-bikers) have had big mileage variations from it.

And of course the fact that in the end, a set of bearings is less garbage than a sealed
bottom bracket (axle, bearings, cups, cover). Anyway, we use whatever fits us best
so there is no point in all this sealed vs whatever thing

Sixty Fiver

It sounds like you are very hard on your equipment and that english is not your first language.

Even a lowly UN26 should last well over 10,000 km, a UN55 should last at least 20,000 km under moderate use.

prooftheory

Maybe you should ask in Mechanical. They might know of more options. I can't even find the phil woods ones that Leuky is refering to.

JeremyLC

Not even 200 miles from a single BB?!

Soo__Fuego

Yeah, because you mentioned the 75, I thought you were also looking at the Grand Mighty. A 103mm JIS BB run about mid 20 dollars, but if you want to spend a lot here's this.
https://harriscyclery.net/product/phi...steel-1191.htm

The crank determines JIS/ISO and spindle length.

prooftheory

The bearings don't just pull out of those though, do they? How are they stuck in?