XLPower Ball bearing 15*21*4 # XL70B21-3

General warning and safety instructions

These products are specially designed for use in RC model building!
Model building articles are not toys and are not suitable for use by children under the age of 14.
Find out in detail about the obligations and risks associated with the use of model building articles.
Model helicopters in particular are complex machines that require careful maintenance and handling.

Read the TOTAL operating instructions for the respective products to familiarize yourself with the product functions before operating them. Failure to operate the products correctly may result in damage to the product or personal property or cause serious injury.

These are sophisticated hobby products. It must be operated with caution and common sense and requires certain basic mechanical skills. Failure to operate this product in a safe and responsible manner may result in injury or damage to the product or other property.

Instructions for safety, operation and maintenance are included here. It is essential to read and follow all instructions and warnings in the relevant product manual before assembling, setting up or using the product so that it can be operated as intended.

1. instructions for proper use:
- “Only use in accordance with the operating instructions.”
- “Do not use this product if it is damaged.”
- “Do not use beyond the intended purpose.”

2. chemicals and toxic substances:
- “Keep away from children.”
- “Use only in well-ventilated areas.”
- “Avoid contact with eyes and skin.”
- “Observe the manufacturer's safety instructions and distance.”
- “Not suitable for consumption.”

3. disposal instructions:
- “Do not dispose of with household waste, dispose of in accordance with local regulations.”
- “Recycling symbol: Disposal at an authorized collection point.”

4. fire and explosion hazard:
- “Keep away from naked flames and hot surfaces.”
- “Do not use near flammable materials.”

RC model building specific parts
1. mechanical spare parts:
- Rotor blades: main rotor and tail rotor blades made of plastic, composite materials, or carbon fiber.
- Rotor blade brackets: Brackets for mounting the rotor blades.
- Main rotor shaft: Central shaft that drives the rotor blades.
- Tail rotor shaft: Drive for the tail rotor.
- Landing gear: Parts for stability during landing and take-off.
- Belt: Drive belt for the tail rotor drive.
- Ball bearings: For various rotating parts to minimize friction.
- Servo arms: For controlling the rotor blades.
- Chassis frame: Structural part of the model.

2. electrical spare parts:
- Motor: Main or rear motor, e.g. brushed motor or brushless motor.
- Speed controller (ESC): Controller for motor operation.
- Servos: Control for rotor blades, tail rotor or landing gear.
- Flybarless systems: Stabilization systems for precise flight control.
- Battery: Lithium polymer (LiPo)
- Receiver: Signal reception from the remote control transmitter.
- BEC (Battery Eliminator Circuit): Voltage regulator for electronic components.
- LED light sets: For visual effects.

3. accessories:
- Blade holder clips: To protect the rotor blades during storage.
- Tool sets: Special screwdrivers, Allen keys and rotor tools.
- Battery holders: For securely fastening the batteries.
- Cable ties and heat-shrink tubing: For secure cable routing.

4. spare parts for control unit:
- Remote control components: Remote control sticks, switches or housing parts.
- Antennas: For the radio link.
- Software/hardware upgrades: Firmware or programming cards for ESC and gyros.

5. housing and design parts:
- Canopy: Protective cover for electronics and motor.
- Decal sets: Decals or paint jobs for customized design.

These spare parts can be customized depending on whether the helicopter is a beginner's model, a 3D aerobatic model or a scale model (scale replica of a real helicopter). It is important to ensure that the spare parts are compatible with the specific model to ensure optimum performance and safety.

Liability insurance
Before operating your RC model, make sure that its operation is covered by your liability insurance. For more information, please contact your insurance company.