Associated Electrics Pro SC 4x4 Qualifier Series, Quick Start Manual

16

:: Motor Manual

550-SL

BRUSHLESS

MOTOR

Congratulations on your purchase of the Reedy 550-SL 

Brushless Motor. The latest brushless motor technology 

along with the design and engineering experience that is 

responsible for 29 World Championship titles has been 

incorporated into its design.

Due to its sensorless design, the Reedy 550-SL Brushless 

Motor operates powerfully and efficiently without 

complicated sensor harnesses. This motor is perfectly 

suited for use with ESCs that are designed to operate 

sensorless brushless motors.

When switching to a higher voltage battery from a lower 

one (11.1V to 7.4V, for example), a change in gear 

ratio or a lower kV motor might be necessary. Otherwise, 

the motor or ESC may overheat and sustain permanent 

damage. Please visit www.reedypower.com for the latest 

gear ratio suggestions for your particular motor and 

vehicle.

This product is a sophisticated hobby product and not a 

toy. It must be operated with caution and common sense 

and requires some basic mechanical ability. Failure to 

operate this product in a safe and responsible manner 

could result in injury or damage to the product or property. 

This product is not intended to be used by children without 

direct adult supervision. It is essential to read and follow 

all instructions and warning found in this manual prior to 

installation, set up, and use in order for the product to 

operate properly and to avoid damage or injury.

Your motor is warranted to the original purchaser for 30 

days from the date of purchase against defects in mate-

rial and workmanship. Motors that have been mishandled, 

abused, used incorrectly, used for an application other 

than intended or damaged by the user are not covered 

under warranty.

Associated Electrics Inc. is not liable for any loss or 

damage, whether direct or indirect, incidental or 

consequential, or from any special situation, arising from 

the use, misuse, or abuse of this product.

•  Oversized Precision Ball Bearings

•  High-Torque 4-Pole Rotor

•  Hardened 5mm Steel Shaft

•  Triple-Insulated Windings

•  Sensorless Operation

•  3.5mm Connectors

•  Completely Rebuildable

Because no single motor works best in all vehicles and in all 

conditions, two models are available to suit any application. 

Be sure to visit www.reedypower.com for the latest 

application and gearing charts for each model and to view 

a complete list of spare and option parts.

Please read the following before installing and using 

your new motor.

•  Please read the instructions before installing and 

     operating your motor.

•  Avoid over gearing by monitoring motor temperature.       

     Operating temperatures should not exceed 80C (175F)

•  Be sure to use the proper size motor mounting screws.

•  Do not over-tighten the motor mounting screws.

•  Do not use a Schottky diode with this motor.

•  Your motor should be installed using 3mm screws with a

     length (generally 6mm or less) that does not allow the  

     screw to extend into the motor more than 5mm. 

     Otherwise, the screw can damage the motor’s internal    

     components.

•  Do not over-tighten the motor mounting screws.

     Doing so may strip the mounting hole threads.

•  Connect the three leads exiting the motor to the three    

     motor leads from your Electronic Speed Control (ESC). 

     If the motor runs backwards when giving it forward   

     throttle, reverse any two motor leads. The motor will  

     now turn in the desired direction.

•  To clean your motor, lightly brush dirt away on a regular  

     basis paying particularly close attention to the areas  

     around the ball bearings. DO NOT spray cleaners or 

     solvents into the motor.

Specifications

550-SL 3500kV

924

2-3 LiPo, 4-8 NiMH

3500

36mm

55mm

210g/7.4oz

5.0mm

10~45A

55A/60s

550-SL 4000kV

925

2-3 LiPo, 4-8 NiMH

4000

36mm

55mm

200g/7.1oz

5.0mm

10~50A

60A/60s

Model

Item No.

Cells

RPM/Volt

Diameter

Length

Weight

Shaft Diameter

Max. Efficiency Current

Max. Surge Current

Internal Resistance

Introduction

Features

Precautions and Warnings

Installation and Maintenance

Caution

Safety Precautions

Warranty