Not sure which type of BB I have. It's an inexpensive Schwinn Network 3.0.. The BB did come loose 700mi. ago and the LBS took it apart, re-greased and re-assembled. He said there was plenty of grease in there from the factory. I did put a few drops of loctite on each side where there are what appear to be threaded collars so it hopefully won't come loose again but it certainly doesn't look "sealed" at least the outside housing doesn't.