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Oilfield bearings
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High speed corrosion resistant bearings
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Bearings for linear guides
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Automotive Bearings-Wheel Bearings
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Customized bearings
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Bearings for robots and manipulators
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Automotive Bearings-Gearbox Bearings
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SKF brand bearings
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Automotive Bearings - Clutch Release Bearings
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Bearings for metallurgical rolling mills
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NSK brand bearings
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Stainless steel bearings
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Automotive bearings-Repair steering gear bearings
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Electrically insulated bearings
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Ceramic bearings with silicon nitride balls
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INA brand bearings
Bearings for UAVs
Bearings used in unmanned aerial vehicles must meet the requirements of lightness, high rotation speed, low friction and corrosion resistance.
Description
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Product Description
Bearings used in unmanned aerial vehicles must meet the requirements of lightness, high rotation speed, low friction and corrosion resistance.
The main types of bearings used include:
1. Deep groove ball bearings
Application: High speed rotating components such as motor shafts, propellers and servos.
Features: Simple design, perception of radial and axial loads; low friction, high speed (e.g. ceramic bearings can achieve higher speeds); Common materials: stainless steel (for corrosion protection) or hybrid ceramics (silicon nitride balls + steel rings).
2. Angular contact ball bearings
Application: Units that require simultaneous perception of radial and axial loads, for example, electric motors of multi-rotor UAVs.
Features: Contact angle (e.g. 15° or 25°) optimized for axial load absorption; a paired installation allows increasing rigidity (for example, in UAV servos).
3. Needle roller bearings
Application: Swinging units with limited space (eg servo rods).
Features: Small radial size, high load-bearing capacity; Suitable for high frequency rocking or limited rotational movements.
4. Self-lubricating bearings
Application: Maintenance-free hinge joints (for example, hinges on folding drone arms).
Features: Material contains solid lubricants (such as PTFE or graphite); resistant to dust, do not require maintenance, but have a relatively low load-bearing capacity.
5. Ceramic bearings (all ceramic or hybrid)
Application: Electric motors of high-end UAVs or extreme conditions (high temperatures / corrosive environment).
Features: Fully ceramic (ZrO₂ or Si₃N₄) - corrosion-resistant, lightweight, but high in cost. Hybrid ceramic (ceramic balls + steel rings) - a balanced solution in terms of performance and cost.
6. Flange bearings
Application: Assemblies requiring axial fixation (for example, chamber suspension).
Features: Equipped with a flange for ease of installation and to prevent axial displacement.
Key factors for bearing selection:
1. Dimensions and weight: Miniature bearings (for example, with an internal diameter of 3 mm) are used in small UAVs.
2. Rotation speed: Electric motor bearings must withstand tens of thousands of revolutions per minute (for example, DJI motors usually use bearings with an accuracy class of at least ABEC-5).
3. Environmental resistance: Waterproof/dustproof seals (such as rubber O-rings) or salt spray resistance (stainless steel).
4. Cost: Commercial UAVs most commonly use stainless steel deep groove ball bearings; Military or industrial UAVs may use ceramic bearings.
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