Hi jakeand. Have you looked here ? http://www.mabuchi-motor.co.jp/en_US...ic/t_0201.html Excellent article on small DC motor specifications. I have a problem with you 'no load' torque. surely this should be 0. And your torque should me in newtons per unit length, so what is your unit length? Also why 5.5v not 7.2v. Finlay since these motors are quite weak, you would of been better to measure RPM with a strobe. When I measured these motors I found they were repeatable in volts to RPM, the so called 'K' factor, but the stall current was difficult to repeat, due to heating and phase position. This is why I have not published them.

Yours Simon M.