These are modified GWS05 servos from Grand-Wing Servo.
These unique gear motors are actually clear-case servos with continuous-rotation ability. No circuit board means you get a cheap, robust, servo-shaped motor with brass bushings on the output shaft.
Each motor comes with a standard servo accessory pack, and an output gear with stop for turning it into a standard 120deg rotation servo-style motor.
These motors supply 47in*oz (3.4kg*cm) torque and 43rpm @ 4.8 volts (78mA free, 600mA stalled), or 56 in*oz (4kg*cm) torque and 58.8rpm @ 6 volts (89mA free, 1.14A stalled). VERY good performance out of a 1.59oz (45g) motor measuring only 1.6 x 0.79 x 1.50" (40.6mm x 20mm x 38mm). The final gear ratio of this modified servo is 325.1:1.
In other words, they're stronger and faster than the regular TS-53 / S3003 style servo we sell, for less money!
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