Precision PM / MIM Sintered Self-Lubricating Bearings for Micro Motors

Features & Advantages

Self-Lubricating Porous Structure enabling automatic oil release and long service life.
Ultra-Miniature Capability, supporting mass production down to Ø0.5 × Ø1.0 × 0.5 mm for smartphone and smartwatch vibration motors.
High Dimensional Precision achieved through PM/MIM near-net-shape forming and calibrated sizing.
Low Noise & Low Friction due to optimized porosity and surface finish.
Wear-Resistant Bronze Alloy System suitable for high-speed micro motors.
Flexible Design Options including 3-series, 5-series, 7-series, N-series and custom geometries.
Cost-Efficient for Volume Production with consistent quality for millions-level output.

Specifications

Series & Types

3-series, 5-series, 7-series, N-series micro-motor bearings
Ultra-small bearings for vibration motors
Bearings for fan motors and airflow modules
Special sliding bearings for custom mechanisms

Size Range

Standard and customized miniature sizes
Smallest mass-produced size: Ø0.5 × Ø1.0 × 0.5 mm

Manufacturing Processes

Precision PM sintering
MIM forming for complex shapes
Sizing calibration, oil impregnation and performance testing

Applications

Widely used in miniature motor systems for:

Home appliances (cooling fans, air purifiers, small household motors)
Automotive modules (HVAC, seat, mirror and actuator motors)
Smartphones & wearables (linear/eccentric vibration motors)
Optical drives and compact precision mechanisms
Smart devices, IoT modules and micro actuators

summary

Oil-impregnated bronze bearings-also known as self-lubricating sintered bearings-are manufactured using high-precision Powder Metallurgy (PM) and Metal Injection Molding (MIM) processes. These techniques create controlled porosity, excellent dimensional accuracy and stable friction performance, making the bearings ideal for miniature and ultra-miniature motor applications in consumer electronics, home appliances, automotive devices and smart wearables.