|loctite 242 vs. antisieze||rvelez|
May 7, 2002 8:23 PM
|We are installing a new bottom bracket on a GT Aluminum frame bike. Should I use loctite 242 or should I use antisieze or are they the same. Thanks tough guys.
|Loctite (thread lockers) are not the same as antisieze||Calvin|
May 8, 2002 4:36 AM
|An antiseize and a thread locker are not the same. A thread locker is a liquid chemical compound that is applied to threads before assembly. (There is a "dry" type thread locking compound, but used on an OEM basis only.) The liquid provides some lubrication for the threads as they are pulled tight with torque. Tightening the thread seals it from air, which allows the compound to cure. Curing does two things to a thread locker. First, it hardens. Different formulas will harden different amounts. Secondly, it expands, which helps keep the thread from loosening. A "service removeable" formula expands a bit and hardens a relatively small amount. Some compounds, such as the bearing retaining compounds (RC) harden quite hard and expand much more. The Service Removable formula means it can be taken apart with normal service tools and procedures. The RC's require more work, and sometimes heat and other special procedures. |
Antisieze is basically a very sticky and durable lubricant. It is appropriate for threads, but never as a bearing lubricant. Is provides a good barrier between metals, especially dissimilar metals.
The thread lockers are useful in they provide an excellent seal against water and dirt. However, antiseize will also prove durable, especially compared to grease. If you use a thread locker, use one such as #222 or #242. Remember the most important component to add is good torque to preload the threads.
If you are installing an aluminum threaded bb into an aluminum frame, I generally would run an antisieze. My feeling here is that the thread locking compounds do not provide as much lubrication for the torque, and that is what I feel is most critical.
|Raphael? From NW Indiana?||floatch|
May 8, 2002 5:40 AM
|"blue" loctite warning||lonefrontranger|
May 8, 2002 8:16 AM
|I wouldn't blue loctite any BB, but I'm sure everyone's experience is different. I'd use anti-seize for the very informed reasoning posted above or (my favorite) teflon friction "plumber's" tape.
This is only because I've had some really awful experience with a couple of blue-loctited BBs due to oxidization that in my experience doesn't occur when using tape or anti-seize. If you plan to remove the BB and service it religiously once every 6 months to a year and don't ride much in wet weather, then you'll probably be okay.
However, if you're like me and tend to do this type of thing only once every 3 or 4 seasons after you've noticed it's getting crunchy, or ride in rain a lot, or just generally use and abuse the heck out of your rig, well - bring a long-ass breaker bar to the party and don't cry if you trash the frame. We popped the head lugs on an old steel MTB frame from trying to remove a blue-loctited (and subsequently oxidized) BB.
|re: loctite 242 vs. antisieze||Bacco|
May 8, 2002 1:05 PM
|The following quote is from the Loctite Webpage for those who want to understand in more detail what anti-seizing compounds are and what they do:
"The Loctite Anti-Seize range consists of heavy duty industrial lubricating compounds which prevent seizing, galling and pitting of metal parts and guard against rust and corrosion caused by chemicals and weathering. It eliminates galling and cold-welding of threaded parts including aluminium and stainless steel, and it lubricates threads, gears, chains, cables, sprockets, levers, pivots, rollers, conveyors, oven doors and hinges.
Loctite Anti-Seize products are highly developed formulations based on a gel grease which provides lubrication at high temperatures for metal parts. Added to this base are lubricant particles which improve performance - especially after torque-down and heat exposure. The final characteristics of the formulation are provided by the addition of fine metal particles which provide the anti-seizing ability and suitability for particular operating environments. These particles act as shims between close fitting metal parts, preventing galling and fusion between them."
It is especially important to use an anti-seize compound on titanium nuts and bolts to prevent them from cold-welding together and becoming really tough to disassemble.
|Neither. Good old grease is the best. (nm)||BigRingKing|
May 8, 2002 7:31 PM
|not if you're Italian threaded (nm)||lonefrontranger|
May 9, 2002 7:34 AM