This 224:1 gearmotor (gearbox with brushed DC motor) is a great low-cost alternative to modified hobby servos or Tamiya gearboxes.  The low-current motor and the compact size makes this unit an attractive choice for small robot designs.

This gearmotor comes pre-assembled, with the gears fully enclosed. There are built-in mounting holes, and the output shaft is 7mm in diameter with two sides flattened (the “D” output is not meant to be used). A built-in safety clutch engages at approximately 60 oz-in.

Specifications

• Description:  90-degree
• Gear ratio:  224:1
• 3 V Operation:
  • No-load RPM:  ~ 24
  • No-load current: ~ 40 mA
  • Stall current:  ~ 400 mA
  • Stall torque: ~ 49 oz-in
• 6 V Operation:
  • No-load RPM:  ~ 46
  • No-load current: ~ 50 mA
  • Stall current:  ~ 733 mA
  • Stall torque:  ~ 57 oz-in
• Weight: 31 g