Originally Posted by PitCrew
Well, they can get them pretty damn close.
And they are not just pressed and left to dry. The magnets are formed and then they are put into a machine that basically "Zapps" them, giving them their magnetic field. I personally would be surprised if the magnets used in motors differed by more than 5-10% in strenght, probably less. This is new motors (and all of they same type).
You would be surprised to know this. These magnets (although i am not 100% sure) are AlNiCo magnets. They are comprised of Aluminum, Nickel, and Cobalt, all of witch are NON-ferrous materials, meaning that in their natural states, none of them are magnetic. But when mixed in the correct proportions and zapped, they produce rather strong permanent magnets. Just a peice of trivia.........
No the magnets that are used in our motors are Ferrite magnets. Not AlNiCo. They are Iron Ferrite with a chemical composition of Ba/Sro-Fe2O3. Iron Oxide, Barium and Strontiam Carbonate. The FB series magnets, which all motor companies use, from the TDK corporation is a high grade anisotropic wet magnet.
The TDK FB higher grade magnets use a Sintering Wet press manufacturing method. Its done by taking a very fine Ferrite powder and sintering it in a Mold. Sintering involves subjecting the material to high temperatures in order to fuse the pressed powder together, thus creating a solid material. The Wet-Press sintering method does create a problem in the tolerance depatment. The magnets have to be machined to size afterword, but before they are magnatized.
Just a piece of trivia.
Sorry but both of you guys were way far off. This is coming from a 20 year old engineering student.
Edit: Forgot, but both stock and mod motors use the FB series magnet. Trinity stock motors use the lower grade FB9, and all handwound high end mod motors, D5, D6, Cobalt, Ti, KR, Pt, Revolution, Checkpoint... use the higher grade FB magnet. Its resistance to heat is better and is its resistance to demagnetization.