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Lego Motor Data Sheet?

Does anyone know where a lego motor data sheet is. I want a commercialy produced motor that will give me the exact same performance as my lego mindstorms NXT motor. If you guys don't know where a data sheet is for a lego motor do you know any simple experiments I could do to figure out what kind of motor I would need?

Do you mean this motor: http://www.philohome.com/nxtmotor/nxtmotor.htm ?
If so the graphs shown should be some help, however the numbers seem to be at the output of the gear train, not the motor alone, if you can figure out the gear ratio you could multiply speed and divide torque to get the values for the motor alone (approximately for torque due to friction)

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