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Old 11th August 2008   #1
johan
 
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Drill BB shell

So when we changed my BB yesterday at the BBQ, water+grease (no RUST!) came flooding out.

I realised that my BB shell is not drilled, is it safe to drill it, with like a 2 mm drill? Or will it collapse into itself once I start riding it?
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Old 11th August 2008   #2
andyp
 
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A lot of bottom bracket shells come pre-drilled so it should be fine, assuming you drill a nice, clean hole.
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Old 11th August 2008   #3
Shinscar
 
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Dont need to say use a centre punch or a twist drill and a hammer to get a nice point of contact for the 2mm bit do i?

Shin
Last edited by Shinscar; 11th August 2008 at 15:14.. Reason: twist drill
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Old 11th August 2008   #4
Smeear
two holes, otheriwse the water etc wont flow out....right?
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Old 11th August 2008   #5
flickwg
 
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if the water got in there must already be another hole, and i doubt there will be that much of a vacum
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Old 11th August 2008   #6
Shinscar
 
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ie one should do. thats what i was thinking...but i had knowledge fear.
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Old 11th August 2008   #7
tynan
 
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Quote:
Originally Posted by Smeear View Post
two holes, otheriwse the water etc wont flow out....right?

+1

If the holes are too small you will need to drill two.

I like that sentence I got to use all three senses of the word two/too/to.

My life's work is done here.

(or just drill a slightly bigger hole)
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Old 11th August 2008   #8
johan
 
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The water probably came in through the seatpost and other various places where it's not 100% water proof. So one hole should suffice.
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Old 11th August 2008   #9
tynan
 
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Quote:
Originally Posted by flickwg View Post
if the water got in there must already be another hole, and i doubt there will be that much of a vacum
Water often gets in around the seat post clamp.
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Old 11th August 2008   #10
stevo_com
 
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i told you you should do this and you go behind my back and ask everyone else, fine, our friendship is officially over
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Old 11th August 2008   #11
johan
 
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Aww damn, I've been caught! It was a one time thing I promise, It will never happen again!
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Old 11th August 2008   #12
johan
 
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Old 11th August 2008   #13
adoubletap
 
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Witnessing what was lurking in your BB shell has given me the fear about mine. Thats my Saturday morning sorted.
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Old 11th August 2008   #14
Dylan
 
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a small 2mm hole will clog with it's own homogenous rust, and the capillary action of weater willl prevent flow.
so it needs to be a bit bigger than that i'd say. 3mm :)
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Old 11th August 2008   #15
horatio
 
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The hole in the bottom of Lal's shell is huge. And it's kind of like three holes over lapping (if you can image what I mean? Like a pathetic olympic rings thing). I'll take a pic later.
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Old 11th August 2008   #16
stevo_com
 
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just forgo the BB altogether, its the new arrospok
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Old 12th August 2008   #17
horatio
 
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My description from memory wasn't exact, but same idea:





You can see there's a bit of surface rust that I'll have to clean out one day. Better than not seeing it and having the BB rot from the inside though.
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Old 12th August 2008   #18
horatio
 
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Ha! Just noticed that you can see a big patch of rubber missing from the back tires. Looks set up, but wasn't!

Stupid Armadillo Elites sucking for skidding. And stupid car park roof, tire killer tarmac of death.
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Old 12th August 2008   #19
stevo_com
 
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Dude, you'd better feel privileged, went into BC today to stock up on Phil Woods grease and they were out of stock with no idea when it's going to be available again. To think I used my precious resource on your BB only to be stabbed in the back!
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Old 12th August 2008   #20
Dammit
He should have taken my advice and gone and asked the kitchen for some- would have spared you the loss.
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