MR84ZZ / MR84Z Ultra-Miniature Ball Bearing (4mm x 8mm x 3mm)

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MR84ZZ / MR84Z Ultra-Miniature Ball Bearing (4mm x 8mm x 3mm)

Model: MR84ZZ / MR84-2Z

Delivers high torque density in a compact diameter design
Precision gear structure ensures smooth & ultra-low noise operation
Wide output speed range to meet versatile industrial needs
Fully customizable gear ratios, shaft dimensions, and wire leads
Heavy-duty industrial grade quality with long operational lifespan

Product Highlights

Ultra-miniature metric footprint (4mm ID x 8mm OD x 3mm Width) suited for high-density electronic assemblies
Dual stamped metal dust shields (ZZ) protecting internal raceways from dust and foreign particles
High-carbon chromium bearing steel (GCr15) providing superior surface hardness and wear resistance
Capable of extreme rotational speeds up to 67,000 RPM under oil lubrication
Precision ground raceways ensuring sub-micron concentricity, minimal runout, and silent rotation
Ultra-low friction torque output optimizing energy efficiency for battery-powered micro drives
ABEC-3 / ABEC-5 precision rating guaranteeing reliable rotational accuracy under micro-load
Full RoHS and REACH environmental compliance across all manufacturing processes

Applications

> Micro Motors & Cooling Fans
> Precision Testing Instruments
> Medical Diagnostic & Imaging Devices
> Automotive Steering & Chassis Systems
> Fitness & High-End Sports Gear
> Textile & Garment Machinery
> High-Precision Spindles & CNC Units
> Material Handling & Conveyor Rollers
> Optical Encoders & Gimbal Systems

Technical Specifications

Parameters	Specifications
Inner Diameter	2.3mm
Outer Diameter	9mm
Width	2.3mm
Precision Rating	P0
Clearance	C0
Sealing Type	ZZ
Number of Row	Single Row
Material	chrome steel
Grease RPM Limit	2000 RPM
Lubrication	Grease
Size	2.393mm
Certificate	ISO9001

Why Choose Us

Factory Manufacturing Capabilities

Modern precision workshop, advanced CNC automated machining centers, and 100% full-inspection assembly lines.

International Certifications

Verified compliance with global standards, supporting smooth customs clearance and regulatory approvals across North America and Europe.