Stripped bottom bracket

Stripped bottom bracket
My frame is threaded and can take in a Shimano BB60 bottom bracket. Unfortunately in one of my recent overhauls my current mechanic mentioned that the threads on the right side of the frame have been stripped due to the previous mechanic over-tightening it plus the constant force i put on the cranks.
Have you ever faced issues with a bike's bottom bracket that just won't turn or seems damaged? In this detailed video, we'll walk you through the best methods to handle a stripped bike bottom bracket.
The bottom bracket of my bike was completely stripped to the point that when you push the left side crank arm, the right crank moves and you can see the bottom bracket lock move out the frame. The ...
Bottom brackets with long cups? Had this happen on an aluminium frame, solved by using an external bb Then there's threadless cartridge bbs Or helicoil inserts?
3. One easier method is to slightly reduce the diameter of the bottom bracket by cutting a slot right across the length of the bottom bracket shell, I believe a hacksaw would suffice. You can then compress the shell and braze it back together, following which you can re-cut the thread, which should roughly follow the original thread. 4.
Ok the threadless bottom bracket idea has been one of the more talked about solutions to this problem. And doing some research it seems like its a common sollution to stripped threads.
Feb 18, 2025
I've repaired stripped threads in aluminum frames before by retapping to Italian threads, and using a Phil Wood bottom bracket. But that will only work for square taper cranks. An advantage to this method, should you replace the frame in the future, and the Phil bottom bracket is still good, you only need a pair of English thread rings to reuse it. And Phil bottom brackets allow an adjustable ...
External bottom brackets are held together by way of the left crank arm attaching to the right crank axle. Shimano actually has a threadless external BB , but even without the full length housing, it will hold together and work fine. but that requires a machined tolerance for the bearings to press into, a stripped out threaded bb is not the same.
Otherwise, "threadless" bottom brackets exist for square taper cranks (and some 24mm spindle cranks) that tighten on themselves rather than the threads in the bottom bracket.
1 day ago
Chris Bryant Crevalle Boat Owners Group 1y · Public Anyone replaced top bracket on Seastar Trim Tab? Broke one and can't find just that part looking online. 2022 26' HBW. 0 reactions · 9 comments Rivers Fredy Fixed Gear NYC 9y · Public How does one remove a semi stripped spline/square tapered bottom bracket...? 3 3 reactions · 9 ...
[4] Project - Stripped Bottom Bracket - Threadless Repair With Instruction Manual datkarma86 107 subscribers Subscribe
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Stripped bottom bracket shell in Mechanics' Lounge
Other tricks I have read about include pouring boiling water over the bottom bracket shell which may cause the bottom bracket to expand very slightly compared to the bb just enough to make a ...
Anyone have an idea to help me remove a stripped bottom bracket from a frame? It is a square-taper Campagnolo bottom bracket - so there is no outboard portion to grab onto, and the female splines have been rounded out.
Bottom brackets can be seized or stubborn over time, especially when water gets into the frame or rusting in bottom bracket area.Remove both the crank arms w...
You probably didn't remove material when you cross-threaded the bottom bracket shell in. If it's a steel frame, you can cut new (correct) threads with the correct taps.
Stripped Crossthreaded Bike Bottom Bracket Thread Repair Chasing Tool DIY Bikes 33 subscribers Subscribed
Securing the bottom bracket tool to the bottom bracket as to prevent slipping (did this on both sides, plastic cup just broke off because it's plastic) Using a 15" wrench with all my body weight Using a socket on the tool and a breaker bar, jumping on it, standing on it
Threadless bottom bracket for frames with stripped threads. - Axle Type: Conical square tapered (JIS standard) - Axle Material: Hollow Cromoly - Thread Type: Threadless - Shell: 68 mm - Sealed cartridge bearings - Fixing bolts included Requires a Shimano type splined bottom bracket removal tool.
The nut also was stripped when I was removing it, so I ordered a replacement 14mm nut for this type of bottom bracket online since I can't find a nut like that in the fasteners section of my local hardware stores. But I can't easily do the same with the bottom bracket, so I need to fix it.
Probably the Bottom Bracket cups need to be removed so the threads can be inspected for damage, like rust, or cross-threading, stripped threads etc. If the threads of the shell are in good enough condition, they can be cleaned and a new BB installed.
15 FAG bottom brackets (BB) with plastic mounting rings are very common in Germany. The cartridge bottom bracket is really good and resilient, however the polyamide (PA) mounting rings are horrible. As you found out there is a tool to turn the splined outside (rosette shaped). It is inexpensive and easy to get in Germany (< 10EUR).
I need help. I used my bottom bracket tool and it stripped my bottom bracket. I went counter clockwise on the non drive side comments Best Add a Comment OutrageousPianist450 • 1 yr. ago
Bottom Bracket Notches Stripped! I have removed and installed the old-style cartridge square taper bottom brackets a few times. On my Poseidon X, I decided to upgrade to HollowTech II and remove the bottom bracket. I used tools from Amazon, which worked on two other bikes. This time, I realized that the stock bottom bracket in the Poseidon was ...
Steel body Chromoly spindle Sealed bearings Repair BB designed to work in frames that have stripped bottom bracket threads Steel 360-370g
There's nothing worse than your bottom bracket getting seized in your bike frame. You've tried every trick in the book, but it just won't budge! Well, thankf...
Stripped Thread on Bottom Bracket by Kenneth1444 » 14 May 2009, 8:06pm I've managed to strip the thread on one side of the bottom bracket of my frame (don't ask). It's a good hand-built touring frame (Wester Ross) about 30 years old. Is there any way this thread can be re-cut, or does the whole bottom bracket need replacing? Ken
This article discusses how to remove and install bottom brackets used in threaded shells, including three-piece cranks, external bearing cups, and the T47 standard.
This bottom bracket removal guide answers the all important question - How to Remove a Bottom Bracket?
Hi all, I'm looking for some advice on my 2016 Voodoo Hoodoo 2016 frame. Due to a poorly installed bottom bracket I am left with cross/stripped threads in my frame when trying to install a new BB. I have a local engineering firm taking a look to see if they can rethread later in the week...
Find out how we repair this frame with stripped bottom bracket threads. This video is the last in a 3 part series, so check the others out Part 1 - • Reviving Vintage Bikes: Saving Worn B...
Here is what I used to do when I had a bike with a stuck BB, even though you said the teeth were stripped, you can probably get this to work: Soak it with PB blaster or similar penetrant. Place the park BB removal tool in the BB, find a bolt that is the same thread/size as the crank arm bolt, but longer - should be able to find one at Home Depot.
This product should work well for stripped bottom bracket shells. Bottom bracket torque specifications vary widely (depending upon model and manufacturer), but will likely not exceed 58 ft-lbs. That's the largest value I could find in Park Tool's list of bike-specific recommended torque values. Pete, what can you tell us about using this product?
I show my favorite methods for stubborn, hard to remove bottom bracket drive side fixed cups from a bike. Watch to the end to see the fun method using an imp...
1) Have you tried more than one bottom bracket? Is it possible that the BB cups are stripped? (Though I have to admit that the BB shell in the picture looks pretty bad.) 2) Have you tried wrapping the BB cups with Teflon plumber's tape? It may be that the Teflon tape will give you just enough added thickness to be able to fully tighten them down.
The bolt with the smaller washer goes inside the bottom bracket shell, through the bottom bracket cup, with the bolt head and small washer centered in the cup. On the outside, I put on the spanner, sandwiching it in place with the large fender washer and the nut.
68 x 122 bottom bracket threaded bottom bracket replaced with threadless BB due to stripped thread. Over time the thread became non existent on this 12 year ...
Stripped threads in bottom bracket shell. Jump to Latest 2K views 2 replies 2 participants last post by mutti_wilson@hotmail.com Jun 4, 2004 M
The Sunlite 68x113mm Repair Bottom Bracket is a threadless, press-fit solution designed specifically for frames with stripped or damaged bottom bracket shells. Perfect for saving otherwise unusable frames, this bottom bracket utilizes an expanding cup system to securely anchor in place without threads, making it ideal for emergency repairs or ...
Re: Stripped bottom bracket shell jb31 Jan 2014, 11:40am Taps can clean out threads but they cannot put metal back on, so if the thread is worn it needs a different type of bottom bracket. A good bike shop use to be able to braze up the threads and then re cut with the tap, only on steel though.
In this article we're going to dive deeper into removing a stuck plastic bottom bracket cup.
THREADING NOTE: Most modern bikes use an ISO thread standard for the bottom bracket. The left side thread is a right-hand direction thread, which tightens clockwise and removes counter-clockwise. This standard is also called English or BSC. The right side (drive side) thread is a left-hand thread, which tightens counter-clockwise and remove ...
I am repairing the bottom bracket of a US$100 bike with hard 2,000 miles (3,200 km). At approximately 1,800 miles (2,900 km) the bottom bracket made a crunchy sound, and after that there was a lot ...
Video tutorial shows how to replace a sealed cartridge bottom bracket.
So my old cartridge bottom bracket is about fall apart and i bought a UN55 to replace it. The plastic non-drive side was very easy to remove, but the drive side is literally impossible. I let it so...
: Bottom Bracket tool: check fitment!!: https://amzn.to/2G6vVOq or you can buy anything else through the link. This has no effect on the price for you. The links used are affiliate links.
5 This question already has an answer here: Stripped out bottom bracket (1 answer)
In this video, I recap on how to remove a bicycle crank arm that's stuck on a square taper bottom bracket, when the crank arm puller thread is stripped.Tools...
2: The chamfer holds the bottom bracket unit straight and central on the BB shell. The 45° interface is better able to manage the axial, radial and precessional forces from pedalling.
Apr 29, 2024
notches are a bit stripped as you can see. currently have an 8mm bolt screwed in the middle to lock the bb tool and keep it from slipping and stripping the notches even more, and to keep my fingers and knuckles in good condition
Stripped out the threads with a cheap amazon bb tool. The non drive side is out but not sure that helps at all since the cartridge is still in it. My thoughts are drill small holes all the way around the spindle then knock the cartridge out.
In this video you will learn how to remove a stuck or seized bottom bracket cup with an impact wrench. For best results soak the bottom bracket cup in a pene...
I screwed up big time and stripped the bottom bracket threads out of my new frame. Here's how I fixed them. Check out the full video for all the details an...
- Steel body - Chromoly spindle - Sealed bearings - Repair BB designed to work in frames that have stripped BB threads Requires a Shimano type splined bottom bracket removal tool. (Shimano's own is SJSC part #858)
Bottom brackets must fit the frames interface type. For example, an english threaded bottom bracket can only be installed on a frame that accepts english threading.
Stripped the knobs on the bottom bracket. Not pictured - stripped the ParkTool BBT-79 on the knobs and the chuck.
My Bottom Bracket on my Santa Cruz Nomad keeps coming loose and it looks like my BB threads are stripped. Is this repairable on an aluminum frame, or is the frame garbage?
Learn the easy way to get press-fit bottom bracket bearings out of your frame. A step-by-step guide from our mechanical expert at road.cc.
Is that steel? A frame builder would build up the surface with brass brazing material using an acetylene torch, then bore that to the correct size, then tap new threads in the new brass, keeping careful alignment with the threads on the opposite side. I don't know what they do to fix aluminum bottom brackets that are stripped.
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