Here are a couple measurements on our 2005 Fisher Price Motor
13 teeth; 1/2" O.D. pinion
Part ID# 74550-0642
Code: TD034701
Measured RPM*:
24,500 @ ~12V (voltage approx)
12,000RPM @ 6.0V
-11,600RPM @ -6.0V (reverse direction)
* Measured using R/C airplane hobby tach & transparent disc w/stripe
Motor Resistance**:
0.069 - 0.074 ohms
**Measured with 10A current source; 4 point measurement of 0.69-0.74 V while turning rotor between fingers
Calculated stall current from above:
162 - 173A (12V/0.069ohms; 12V/0.074ohms)
All these measurements agree well enough by those provided by Paul Copiola at
http://www.chiefdelphi.com/forums/sh...ad.php?t=32442
-David