500 RPM Johnson DC Gear Motor, Side Shaft (Grade A)

The 500 RPM Johnson DC gear motor (Grade A) is a 12V geared motor with a metal gearbox, all-metal gears and a side (off-centre) output shaft. It is a popular choice for light, fast wheeled robots and fans or spinners.

Key specifications

• Output speed: 500 RPM at 12V (no load)
• Base motor speed: 6100 RPM
• Gear ratio: 12.2:1
• Rated torque: 16.2 N-cm (1.7 kg-cm)
• Stall torque: ≈ 110 N-cm (≈ 11.2 kg-cm)
• Rated voltage: 12V DC
• No-load current: 800 mA; load current up to 7.5 A (max)

Torque values marked ≈ are estimates scaled from the 300 RPM model. Please contact us if you need the exact datasheet figure.

Mechanical details

• Gearbox: metal housing with metal gears
• Gearbox diameter: 37 mm; motor diameter: 28.5 mm
• Body length: 63 mm (without shaft)
• Output shaft: 6 mm diameter, 30 mm long, with M3 tapped hole
• Shaft position: side (off-centre)
• Weight: 180 g

Good to know

• All seven speeds (10 to 1000 RPM) share the same body and mounting, so you can change speed without changing your chassis.
• Drive it with a motor driver rated for the stall current, such as an L298N for light loads or a BTS7960 / Cytron driver for heavy loads.
• Pair it with a 6 mm hub or coupler and a 37 mm motor mounting bracket.