A miniature brushed DC motor with a 20:1 metal gearbox and an extended back shaft for mounting optical encoders. All micro metal gearmotors share the same physical dimensions, so different gear ratios can be easily swapped without changing your mechanical design.

Key Features

• 20:1 Metal Gearbox – Balanced speed and torque for general-purpose applications
• Extended Back Shaft – 4.5mm long, 1mm diameter rear shaft for optical encoder mounting
• D-Shaped Output Shaft – 9mm long, 3mm diameter metal shaft
• Compact Form Factor – Standard micro metal gearmotor dimensions, interchangeable with other ratios

Specifications (20:1 @ 6V)

• Speed: 1050 ±10% RPM
• Free-Run Current: 90mA (180mA max)
• Stall Torque: 0.26 kg·cm
• Stall Current: 850mA
• Output Shaft: 9mm long, 3mm diameter, D-shaped
• Back Shaft: 4.5mm long, 1mm diameter

Ideal For

• Small robotics and mobile platforms
• Projects requiring speed feedback via optical encoders
• Compact mechanisms needing moderate speed and torque

Resources

• 20:1 Gearmotor Datasheet (PDF)