3060-POLOLU 5:1 Micro Metal Gearmotor HPCB 6V
This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 4.995:1 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 6 V: 6000 RPM and 120 mA with no load, 2 oz-in (0.1 kg-cm) and 1.6 A at stall.
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