3067-POLOLU 210:1 Micro Metal Gearmotor HPCB 6V
This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 210.59:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter.
Key specs at 6Â V: 140Â RPM and 120Â mA with no load, 50Â oz-in (3.6Â kg-cm) and 1.6Â A at stall.