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Yuyao, Ningbo City, China
Bearing Shields for Electric Motorcycle Bearings
In electric motorcycles, bearings are exposed to harsh outdoor environments including sand, dust, water, and constant vibration. To ensure reliable performance across diverse terrains and high-speed operation, bearing shields play a vital role in protecting the bearing core.
Bearing Shields for Electric Motorcycle Bearings Manufacturer in China
Metal shields (Z/ZZ types) offer the following benefits:
Prevent debris ingress from road particles and dust
Retain internal lubrication for consistent rotation at high RPMs
Enhance bearing life under shock loads and frequent acceleration
Resist corrosion in wet or humid riding conditions
For electric motorcycles, riders demand components that are durable, low-maintenance, and built for performance—and bearing shields are a key component in delivering that reliability.
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Metal bearing shields for Electric Motorcycle
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Recommended materials
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Wheel Hub Bearings
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SUS304 / Nickel-plated steel / SPCC
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Motor Shaft Bearings
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SUS316 / SUS304
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Crankshaft / Transmission Bearings
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High strength carbon steel / galvanized steel sheet
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Suspension Linkage Bearings
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SUS304 / SPCC with coating
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Steering Head Bearings
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Stainless steel 304 or rust-proof plated carbon steel
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Foot Pedal Return Mechanism
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SUS304
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Why Choose Metal Shields (Z / ZZ) Over Rubber Seals (2RS)?
Suitable for high-speed and high-temperature environments, metal shields maintain their shape without deformation.
Lower friction, making them ideal for components that require smooth acceleration and high-speed rotation.
Reliable sealing performance even in harsh conditions, while also allowing better heat dissipation.
Advantages of Electric Motorcycle Bearings with Metal Shields
Electric motorcycles operate under extreme conditions — from high-speed rotation and sudden load impacts to exposure to dust, mud, and rain. In these environments, bearing shields are not just accessories — they are essential components for protecting the integrity and performance of the bearing.
Our metal bearing shields (Z / ZZ types) are designed to:
Prevent contamination from sand, water, and road debris
Retain lubrication, reducing internal wear and friction
Support high-speed rotation with minimal resistance
Improve corrosion resistance, extending service life even in wet environments
IATF 16949 Quality Management System for Bearing Shields
To ensure consistent quality and precision, our factory operates under the IATF 16949 quality management system, fully certified to meet the automotive industry’s highest production standards for bearing shields. This guarantees:
Tight dimensional control for shield fit and function
Reliable sealing performance under dynamic conditions
Process traceability from raw material to finished product
Mass production capability for OEM and aftermarket supply
Bearing Shield Selection Guide
Optimized Material & Structure Recommendations for Various Applications
Application-Specific Recommendations
Wheel Hub Bearings
Requirements: High-speed rotation, dust/water protection, sand resistance
Recommended Materials: SUS304, Nickel-plated steel, SPCC
Structure Type: ZZ-type
Motor Shaft Bearings
Requirements: High temperature, high speed, oil resistance, magnetic field protection
Recommended Materials: SUS316, SUS304
Structure Type: Z-type / ZZ-type
Crankshaft/Transmission Bearings
Requirements: High load, impact resistance, metal debris protection
Recommended Materials: High-strength carbon steel, Zinc-plated steel
Structure Type: ZZ-type
Suspension Linkage Bearings
Requirements: Mud/water corrosion resistance, impact resistance, wear resistance
Recommended Materials: SUS304, SPCC with coating
Structure Type: ZZ-type
Steering Head Bearings
Requirements: Vibration resistance, water/mud resistance, rust prevention
Recommended Materials: SUS304 stainless steel or rust-proof electroplated carbon steel
Structure Type: Z-type / ZZ-type
Foot Pedal Return Mechanism
Requirements: Small space, frequent operation, steam resistance
Recommended Materials: SUS304
Structure Type: Z-type
Material Distribution by Application
Shield Structure Comparison
Dust Cover Tolerance Standards [^1]
| Dimension | Range (mm) | Max Tolerance (mm) |
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| dF | 3-30 | 0.02-0.04 |
| DF | 3-30 | 0.02-0.05 |
| DF1 | 3-30 | 0.05-0.07 |
| HC | 5-30 | 0.02-0.05 |
| BF1 | 1.5-3.5 | 0.04-0.08 |
| BF2 | 0.5-2 | 0.05-0.20 |
[^1]: Technical tolerance standards for bearing shield manufacturing.
