Bottom Bracket Removal Advice? - Threaded/Press Fit

[patliean1]

Hey yall,

I have a BB86 press fit bottom bracket I want to remove. One side presses in, while the other cup threads in. This makes for easy install but terrible removal.

Once I remove the threaded side first, my existing tool isn't long enough to "push" the other cup out. That and the inside bearing "lip" isn't pronounced enough for my bearing removal tool to remove the entire cup without removing just the bearing cartridge itself. Leaving behind just the shell.

I was thinking of making a round wooden block where I could use a rubber mallet to knock the bearing/cup/shell out.

Any thoughts?

[glepore]

That would work, but its unlikely that you could, without say a lathe, make a round tube of exactly the od of the bb shell and thus make contact completely around the cup. A square piece of wood would be as effective as a round piece that wasn't perfect, just go slow at various places on the cup, rotating with each tap.
Are you planning on reusing the bb? If so, why not leave the cup in place and just press in new bearings?

It might help to know what bb is in there, but if you're going to replace everything I have an idea, but it would destroy the shell.

[bremerradkurier]

A piece of PVC pipe with OD close to the cup diameter might work better than a wooden block.

[patliean1]

This is the bottom bracket below. I'm using the BB for another frame

https://novatoride.com/en/products/boitier-de-pedalier-bb86-shimano

[glepore]

Ok. My first impulse would be to get a large flat washer that is close to the ID of the frame's bb area-put it on a threaded rod with a nut on either side and use that as a tool -just tap on the other end of the rod with a hammer. The pipe idea is ok as well, as would be a square piece of wood. Honestly if its not bonded, you could even try a large screwdriver alternating taps left and right side very cautiously until it moves. If its bonded with Loctite you'll need something that maybe catches the sleeve part in several areas, the washer method is most likely to do that. If its a little small, don't try to center it, use it bottom, tap, then top, tap. It'll likely engage enough of the lip to move it without an issue.

Edit-looking at the installation manual it appears there is a fairly nice size step between the threaded sleeve and the cup, so finding a washer that mostly or totally engages the sleeve but fits in the frame shouldn't be hard.

[glepore]

Gotta say, that's a wacky arrangement as no standard removal tool would work. Token's system (and others) that thread together with tool engagement on both cups is much easier to remove

[Serge_K]

https://www.aliexpress.com/item/1005005896124123.html It's what i have. On the listing they mention the sizes of the oval things, hopefully one is the right size?
Before that, i managed to remove a really old PF BB from a my giant with a simpler BB tool (didn't have the oval thingies) and a 3d printed oval thingy & metal washers.

[SirBikealot]

is the conection between drive side and non drive side solid? If so, i would unscrew the bb a few rotations and then tap it back in until the drive side pops out.

[glepore]

is the conection between drive side and non drive side solid? If so, i would unscrew the bb a few rotations and then tap it back in until the drive side pops out.

Yes, that's a good idea as well.

[patliean1]

is the conection between drive side and non drive side solid? If so, i would unscrew the bb a few rotations and then tap it back in until the drive side pops out.

I'm such a mess over here LoL. I tried this months ago on a different frame using the same BB, and ended up ruining the threads inside the shell. So now the BB is toast.

The problem is the inner sleeve/shell isn't removable on its own. I have the same tool as @Serge_K . Works very well for removing 3-piece pressfit cups, where you can remove the sleeve prior from either side. The silly threading rod isn't long enough, but it's clear I'm doing something wrong. Will try a flat washer as @glepore mentioned.

Thanks everyone for your help. I really appreciate it!

[ZacItaly15]

what kinda BB86 do you have?
This:

https://it.aliexpress.com/item/1005008204985145.html?src=google&p4pItemId=1005008204985145&p4pAdGroupId=5000946363285,5000980203522&src=google&albch=shopping&acnt=272-267-0231&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&&albagn=888888&&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=it1005008204985145&ds_e_product_merchant_id=5504851841&ds_e_product_country=IT&ds_e_product_language=it&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=20705056984&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=EAIaIQobChMI37Gr15vziwMVtbGDBx1Z-QokEAQYByABEgJu-vD_BwE


Or the long sleeve version like this:
https://it.aliexpress.com/item/33023047002.html?src=google&pdp_npi=4%40dis!EUR!9.16!8.89!!!!!%40!12000018628700889!ppc!!!&src=google&albch=shopping&acnt=272-267-0231&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&&albagn=888888&&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=it33023047002&ds_e_product_merchant_id=107411694&ds_e_product_country=IT&ds_e_product_language=it&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=20730495829&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=EAIaIQobChMI37Gr15vziwMVtbGDBx1Z-QokEAQYCCABEgIXi_D_BwE

[patliean1]

After an hour of dicking around with different washers and removal setups, I was able to get the bottom backet out.

Thanks everyone for your help.

[vermit25]

Wondering if you know the difference in the two BB's you posted. I needed to change my BB and I ordered one similar to your 2nd link, but it does not fit and the current BB seems to be similar to your first link.
Both are BB96 24mm. Just wondering what the differences are so that I can know what to look for.

Thanks

what kinda BB86 do you have?
This:

https://it.aliexpress.com/item/1005008204985145.html?src=google&p4pItemId=1005008204985145&p4pAdGroupId=5000946363285,5000980203522&src=google&albch=shopping&acnt=272-267-0231&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&&albagn=888888&&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=it1005008204985145&ds_e_product_merchant_id=5504851841&ds_e_product_country=IT&ds_e_product_language=it&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=20705056984&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=EAIaIQobChMI37Gr15vziwMVtbGDBx1Z-QokEAQYByABEgJu-vD_BwE

Or the long sleeve version like this:
https://it.aliexpress.com/item/33023047002.html?src=google&pdp_npi=4%40dis!EUR!9.16!8.89!!!!!%40!12000018628700889!ppc!!!&src=google&albch=shopping&acnt=272-267-0231&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&&albagn=888888&&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=it33023047002&ds_e_product_merchant_id=107411694&ds_e_product_country=IT&ds_e_product_language=it&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=20730495829&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=EAIaIQobChMI37Gr15vziwMVtbGDBx1Z-QokEAQYCCABEgIXi_D_BwE

[Serge_K]

Wondering if you know the difference in the two BB's you posted. I needed to change my BB and I ordered one similar to your 2nd link, but it does not fit and the current BB seems to be similar to your first link.
Both are BB96 24mm. Just wondering what the differences are so that I can know what to look for.

Thanks

one is in 3 bits (A), the other 2 (B).
B has parts 1 & 2 thread into each other. it's what i have. Obviously, thread means you need a tool to grab the teeth so you can thread it together.
A is like the shimano standard design. 2 cups, and 1 plastic sleeve in the middle. Although Shimano's version is plastic, and this link is metal. I see no good reason to use A over B. You need a tool that will press the cups into the frame. technically you can buy a threaded rod & a bunch of washers from the DIY store, but the universal BB tool from AliX is cheap, so probably makes sense to buy that and save a trip to the DIY, and the time you'll need to figure out exactly what you need. And the DIY version wont let you extract the cup, unless you can 3d print an oval piece. Buy the tool

Using shimano plastic BB is useful if your frame has shit tolerances in the BB area, as plastic cups deform easily.

"it does not fit" when talking BB isn't enough info. you may have the wrong spindle diameter, the wrong spindle length, the wrong BB width, the wrong BB diameter, PF vs threads, it's an absolute minefield.