OOOOk. According to a search that I did on the Bike Forums, chasing a bottom bracket cleans the threads so it threads more easily. However, the facing of a bottom bracket is the cutting of the face of the BB shell so that the plane of the face is perpendicular to the axis of the Bottom Bracket.

However, an assumption that I am making as of now is that facing and chasing are not always necesary, at least not facing. Would a frame builder not face the bottom bracket before painting? I can understand needing to chase a bottom bracket after having it shipped to you, but the facing?

Ill probably bring it in anyway for insepction at the LBS.

HEre is the thread which I found:
http://www.bikeforums.net/archive/in.../t-132357.html

Im just wondering what your thoughts are on having to chase/face brand new frames direct from builder, and not that it makes a difference indicating the maker, but its an Iro Frame XD. IDK if it also makes any difference, but the Crank im using is SRAM Omnium. External bearings.

According to what ive read in addition to the indicated thread, im assuming that chasing and facing are not always necessary, and that I can install the crank with no facing/chasing at all (of course with copious amounts of grease=p).

Ive had a bike before, but this is the first time that I will build it from the ground up.

I just need help and hope you guys will bear with me as I go through the process.