NEO V1.1

NEO Motor Overview

The REV NEO Brushless Motor V1.1 (REV-21-1650) is the initial update on the first brushless motor designed to meet the unique demands of the FIRST Robotics Competition community. NEO V1.1 offers an incredible power density due to its compact size and reduced weight, and it's designed to be a drop-in replacement for CIM-style motors, as well as an easy install with many mounting options. The built-in hall-effect encoder guarantees low-speed torque performance while enabling smart control without additional hardware. NEO V1.1 has been optimized to work with the SPARK MAX Motor Controller (REV-21-2158) to deliver incredible performance and feedback.


  • Drop-in replacement for CIM-style motors

  • Shielded out-runner construction

  • Front and rear ball bearings

  • High-temperature neodymium magnets

  • High-flex silicone motor wires

  • Integrated motor sensor

    • 3-phase hall sensors

    • Motor temperature sensor

New to NEO V1.1

  • A tapped #10-32 hole on the end of the shaft, allowing teams to retain pinions on the shaft without using external retaining rings

  • A tapped #10-32 hole on the back housing of the motor, making it no longer necessary to remove the motor housing to press pinions

  • Additional holes on the front face of the motor for added mounting flexibility


Empirical means based on observations or experience. Theoretical means based on theories and hypotheses. The two terms are often used in scientific practice to refer to data, methods, or probabilities. When we refer to empirical data, we refer to values that were produced via testing. When our documentation refers to theoretical values, those are values that are based on what the product can do, in theory, but have not directly been produced.

Empirical Motor Specifications

Empirical Motor Kv

473 Kv

Empirical Free Speed

5676 RPM

Empirical Free Running Current

1.8 A

Empirical Stall Current

105 A

Empirical Stall Torque

2.6 Nm

Empirical Peak Output Power

406 W

Theoretical Motor Specifications

Theoretical Stall Current

150 A

Theoretical Stall Torque

3.75 Nm

Theoretical Peak Output Power

540 W

Additional Specifications

Nominal Voltage

12 V

Typical Output Power at 40 A

380 W

Hall-Sensor Encoder Resolution

42 counts per rev.

Output Shaft Diameter

8mm (keyed)

Output Shaft Length

35mm (1.38in)

Output Pilot

19.05mm (0.75in)

Body Length

58.25mm (2.3in)

Body Diameter

60mm (2.36in)


0.938 lbs (0.425 kg)

Check out the NEO Motor Data Sheet for additional information. Also, please pay special attention to the NEO Motor Locked Rotor Testing and please make sure you have read and understand how to set the SPARK MAX Smart Current Limit.

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