Hobbywing JUSTOCK Handout Spec-21.5T Manual

Hobbywing Radiostyret legetøj JUSTOCK Handout Spec-21.5T

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Safety Notes

CA UT IONS

Thank you for purchasing this sensored brushless motor(s) for RC cars! The high power system

can be very dangerous, so please read this manual carefully before using and follow the

operating procedures strictly. In that we have no control over the installation, use and

maintenance of this product, no liability shall be assumed nor accepted for damages, losses or

costs resulting from the use of this product. Besides, we own the right to change the product

design, appearance, functions and operational requirements without any notifications.

AT T ENT ION

Features

Gear Selection

Assembly and Disassembly

Specifications

ModelPN KV

(No-load)

No-load

Current

Dimension

(mm)

Shaft *

(mm) Pole Weight ApplicationsLiPo Resistance

2~3S 4 1/10 STOCK

JUSTOCK Handout Spec-13.5T

JUSTOCK Handout Spec-17.5T

JUSTOCK Handout Spec-21.5T

3200KV

2600KV

2100KV

0.0174

0.0244

0.0398

2.7A

2.2A

1.7A

30408018

30408017

30408016

Ø=36mm

L=48.5mm

Ø=3.175mm

L=12.4mm

147g

148.5g

148g

It is very important to select the reasonable gear ratio, as inappropriate selection may cause great loss to users. Please select the correct gear ratio according to the following points!

1. Operating Temperature of the Motor

During the operation, the motor temperature should be lower than 90 (194 ). Temperatures above 90 will demagnetize the magnet & may melt the coils and eventually damage the ESC ℃ ℉ ℃

(because of strong current). Therefore, the most effective way to prevent over-heat is to select the right gear ratio.

2. Principle of Gear Selection

To avoid potential risks, caused by overheating, which may lead to ESC/motor damage or malfunction, please start with very small pinion and check ESC & motor temperatures frequently throughout

a run. This is the only way to guarantee that you are not causing excessive heating. If Motor and the ESC temperatures remain stable and low in the running, then you can slowly increase the pinion

(with more teeth) while again monitoring the temperatures to determine the safe gearing for your vehicle and motor. Because the climate and track conditions always change, please keep

monitoring ESC & motor temperatures to protect your electronics from damage.

For prolonging the motor life and raising its efficiency, we recommend users to check the bearing, and clean the motor regularly; and the specific interval depends on the usage frequency and

terrains. Please follow the assembly diagram below to assemble the motor, and disassemble in reverse order.

USER MANUAL

JUSTOCK Handout Spec

Sensored Brushless Motor

• The motor adopts 4-pole 12 slot core. Compared with the 2-pole motor of the same specification, the output power is increased by more than 25%, the efficiency of the rear section is increased by more than

10%, and the maximum temperature can be reduced by 50%.

• Built in high-precision Hall sensor and magnetic ring greatly improve the consistency of Hall output, ensure the stable running of the motor in sensor mode, and make the motor have excellent linearity.

• Dual sensor port design to meet various wiring needs.

• The use of high-performance stator core, 200 ° C high temperature resistant enameled wire, high-precision and high-strength bearing and explosion-proof structure rotor provide guarantee for the excellent

performance and lasting durability of the motor.

This product is NOT a toy and it is for use by adults and teens over 14 only, so please keep it out of children’s

reach. Please keep the following points in mind; otherwise it may damage the product and cause property

loss and physical injuries to users.

• Never leave this product unsupervised when it is powered on. If any problem occurs, the product may cause a fire

and jeopardize peripheral devices.

• Please check wire sequences between the ESC & the motor carefully before the connection, to avoid any possible mistakes.

• Please insure all the wires and interconnecting pieces are well insulated before the connection, as short circuits may

damage the product.

• Never allow water, oil, fuel or other conducting liquids to get inside this product or other electronic parts, as these

liquids may contain harmful minerals for electrical circuits. If that really happens, please turn off the device

immediately, and then clear and blow-dry it carefully.

• Please read through manuals of each power equipment (like ESC, motor, battery, etc) and chassis to ensure the

power system configuration is rational before the use, as the incorrect power system configuration may result in

overload and eventually damage the equipments.

• Prohibit the full throttle operation before the pinion installation. Under non-loaded circumstances, over-high RPM

may cause damage to the motor.

• Make sure all the parts are well connected, as misconnection or poor connection may lead to abnormal control,

damage or other unpredictable problems.

• Never let the temperature of the motor can (shell) exceeds 90°C (194°F), otherwise the motor is likely to be

damaged and (or) the rotor will be demagnetized.

Installation & Connection

1. To Install the Motor

Screws used for installation are 3mm in diameter & 5mm in length. Before mounting the motor onto

the vehicle, please ensure that all the screws are applicable to avoid damaging the motor. In general

it’s ok to adopt screws which are 3 mm in diameter and less than 8mm in length; the specific length is

up to the chassis size.

2. To Connect the Motor

1) Three power wires need to be connected to the motor, Please note the ESC mark while connecting ESC output wires to motor power wires and ensure connections are: A-A, B-B and C-C.

2) If you are using a sensored ESC, please insure Hall-sensor wires are clean and undamaged; then connect them in the correct direction to the sensor ports of the motor & the ESC respectively.

In such a case, the wire sequence of the ESC and the motor must strictly follow the rules of A-A, B-B and C-C. Do not change the wires sequence.Warning:

3) While if the ESC is a sensorless one, then connect the motor and the ESC according to the above way may cause the motor to rotate in the opposite direction, because definitions of phase (#A / #B / #C) are

different among manufacturers, at this time you only need to swap any of two wire connections.

3. Checkup

Recheck the installation and all the connections carefully before turning on the power.

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