Picture the scene, you walk into your local branch of ******** and you see…
…up on the workstand is a Boardman EM1.7 with it’s chainset removed. Mr Mechanic then appears with a hammer and a seatpost and proceeds to attempt to drift out the NDS bearing from the BB shell by hammering the seat clamp with the post wedged against the bearing.
This continues for a few minutes, unsuccessfully.
As I wait patiently for my order to turn up, I casually ask why a bearing drift, or some other more suitable tool is not being used.
“We’ve been asking for the proper tools for ages” came the response. Mr Mechanic then retrieved some other cylindrical object and continues to hammer away at the bearing.
So I ask myself, would I be happy with a bike shop engaging in such hamfistery with my bike? No, I probably wouldn’t.
( To be fair, I didn’t hang around to find out what happened next and I’m not having a pop at the mechanic.)
Am I just being a bit precious? 😉Posted 4 years ago
Doing it square and supportin the structure to be twatted are important parts of it though
To bodge you must first understand what yor trying to achieve and the restraints …… Your fella in halfords obviously doesnt . He is half way though – with careful tuition he will be good 🙂Posted 4 years ago
You would be surprised how many “proper” cycle tools are designed with a hammer as part of the process
A nice large seat post seems like a good drift if tbh only maybe with the seat
Clamp end removed and plugged
You can’t use somthing the full diameter o a bb30 bearing as the cir clips are in the way
And a slide hammer tends to pull on only the very inner race
How would you remove them ?Posted 4 years ago
Does the var one have a tube that rests on the outside of the bb shell and marks the paint as the force of pulling the bearing out forces the tube onto the frame
Quite possibly, but I would prefer paint loss to brutality.
Don’t see what’s wrong with a blind bearing puller and slide hammer solution, no chance of missing and hitting the frame, and is well proven for lots of other industrial bearing applications.Posted 4 years ago
You might not have, but someone at some point will.
The other thing to consider is with a drift you aren’t exactly pushing the bearing in a parallel direction whereas with a blind puller/slide hammer it is.
Be interesting to see how well BB30 frames age with respect to wear once they have had a few changes of bearings.Posted 4 years agoPeterPoddyMember
Var do a very neat pulling solution for BB30 bottom brackets.
Neat end expensive. The Park Tool version works exactly the same as a headset removal tool as, well, press fit BBs are headsets turned through 90 degrees…! It’s also under £25 at trade. I have one. 🙂
To be fair, a seat post is a reasonable item to use as a drift.Posted 4 years agoIanWMember
Having just removed the BB30 bearings (6806 by another name) from my new carbon Bianchi with a hammer and a screw driver and used the same tools to reinstall the new bearings.
Same method as with cars and machinery etc. tiny taps….
No need for a seatpost that’s just faff.Posted 4 years ago
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