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Chasing and Facing BB Shell: A Task for Pros Only?(11 posts)

Chasing and Facing BB Shell: A Task for Pros Only?mdehner
Sep 30, 2003 7:29 AM
Assuming access to a professionally-equipped shop, is this generally something an amateur can accomplish, or is this a fool's errand?

Any suggestions? The bike is a beater, if that helps.

With the right tools, basically a no-brainerTJeanloz
Sep 30, 2003 7:44 AM
Anybody who has the right tools will probably know how to use them. If the question is whether you could borrow somebody's tools and do it yourself, possibly, depending on how mechanically inclined you were. The only danger I would see are cross-threading (which would totally destroy your frame). Somebody mechanically inclined, who basically understands what they're doing, even if they've never actually done it, shouldn't have any trouble. Somebody without that understanding should probably leave the job to a pro.
I've seen it, and it's uglygtx
Sep 30, 2003 9:07 AM
I watched a sales guy cross thread his bb once. Ooops! Also, make sure you understand the difference between English and Italian. Make sure to use lots of cutting oil and go slow and easy.
just pay LBScyclopathic
Sep 30, 2003 8:03 AM
tool is pretty expensive, no reason to pay a couple hundred for tool you'd need once or twice. LBS shouldn't charge more then 15$.
just pay LBSAcesFull
Sep 30, 2003 9:54 AM

The cheapest I can find it here in Hatebikesville (AKA Atlanta) is $35 at Free Flite.

I like Free Flite because they do good work, but damn I hate the LBS man sometimes.

I just paid $40 for thispitt83
Sep 30, 2003 11:44 AM
Didn't shop for chapest LBS, but I thought $40 was high. However, I didn't buy the frame there and they have the right to charge what they deem market rate.

They did, however, do a real nice job. BB went in smooth.
just pay LBSrussw19
Sep 30, 2003 11:52 AM
It's a $400 tool. Most shops use it less than 5 times a year. It has to get paid for somehow. $35 is still worth it. Once it's done, you never have to do it again unless you repaint your frame or something like that. Pay the money and have it done right. It's worth it.

Not complainingpitt83
Sep 30, 2003 4:37 PM
A tool I don't need to own and a technique I'll never have to master by trial and error. As you say, rarely used, even by the shop. I don't buy enough frames to ever make it economical.

Now I know that my new BB shell is good and I won't ruin BB's, frames or have them cross thread. Money well spent.
re: Chasing and Facing BB Shell: A Task for Pros Only?russw19
Sep 30, 2003 12:06 PM
The most common mistakes with this are not using enough thread cutting oil, going too fast, and cross threading.

Use lots of cutting oil. Put 3 or 4 drops every turn of the tool. Second, turn a 1/4 turn, back it off, turn a 1/4 turn, back it off... repeat ad nauseum. Don't just crank on the tool, you will destroy it. For that reason, if I owned this tool (it costs shops over $400, and that's wholesale!) I wouldn't loan it to ANYONE who I didn't know ahead of time was a very qualified mechanic. In fact, if I owned the shop I currently work at, there are about 3 people there on our staff I wouldn't let do this (but I also think they have enough sense to know their own limitations and not try...)

And last, it's easy to cross-thread the shell. If you read the tool, the part that says LH refers to the tool, and that it is a left hand thread cutting tool. NOT the left hand side of your frame. If you have an English BB, then the left-hand threading goes into the right hand side of the frame. A lot of people screw this up and cross thread their BB shell.

When in doubt, pay the money. If your frame is worth doing this to, it's worth paying for having it done right.

re: and what would you do ifcyclopathic
Sep 30, 2003 2:34 PM
pro had cross-threaded your shell?? go italian?
Easy work with the right tools.NatC
Oct 1, 2003 11:00 AM
I used to prep frames for a manufacturer, and part of the job was chasing/facing. It's darn easy, but some things (such as this) are worth the money to just have a shop do it. Didn't the frame builder face/chase your BB shell already?