|Recommended Bottom Bracket Installation Method||jeph|
Oct 10, 2002 3:22 PM
|What's the "best" way to install a bottom bracket in a ti frame? Use teflon tape with a little grease? Use just anti-seize? Only grease? Of course I'll torque it to spec. Will the tefon tape (if used) affect the torque reading? If it matters, it's a Record BB. Thanks for any help.|
Oct 10, 2002 4:02 PM
|Although teflon tape has become popular, it's real use is to fill gaps between pipe threads and act as a sealant.
Grease or antiseize will both do the trick, if the BB is torqued properly. Personally, I'd go with the antiseize. Both are lubricants. Although they don't affect the torque reading, any threaded component that's lubricated will have a higher tension than one that's not, if both are torqued the same. I would assume that all manufacturer's recommended torque setting assume a lubricated assembly.
|As usual, experience vs. science,||TJeanloz|
Oct 11, 2002 9:26 AM
|I have no idea what teflon tape does, except that it works in bottom brackets in ti frames.
If you put in only grease or anti-seize, and don't re-install with any degree of frequency, your bike will develop the most annoying 'click' in the world. Use teflon tape on installation, this click goes away.
Again, I have no idea why it works, but I've seen it enough times that I know that it does.
|As usual, experience vs. science,||weiwentg|
Oct 11, 2002 9:48 AM
|so, is it best to use teflon tape with anti-sieze or without? will the BB be in any danger of siezing to a ti BB shell if you tape the threads?|
Oct 11, 2002 10:02 AM
|Our standard procedure was to put anti-seize compound on the threads in the frame, and wrap the cups with teflon tape. I will acknowledge that this is a bit of a 'why not' scenario. I can't absolutely guarantee that your bottom bracket will need teflon tape (or anti-seize for that matter), but the odds are good enough, and the costs low enough, that it makes sense to take the precaution.|
Oct 11, 2002 4:32 PM
|I appreciate everyones help. TJeanloz, what worries me about the tape method is getting an accurate torque spec. I've done this in the past on alum. frames and you can feel more "drag" when your threading the taped cups into the frame. Won't this affect the torque reading?|
Oct 12, 2002 7:20 AM
|Geez, this isn't brain surgery. Obviously the tape won't hurt, but grease or antiseize should be used to prevent corrosion between the dissimilar metals.
Any affect on the torque reading would be negligible. If the torque is off 1-2% it won't make any difference. If you're using the old beam type torque wrench, you can't even read it that closely.
|Litespeed recommends grease (nm)||Kerry|
Oct 10, 2002 4:45 PM