MR125, MR125Z, MR125ZZ, MR125RS, MR125-2RS Miniature Deep Groove Ball Bearings 5x12x4mm – Precision Micro Bearings for Small Motors, Drones, RC Models & Smart Electronics

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MR125, MR125Z, MR125ZZ, MR125RS, MR125-2RS Miniature Deep Groove Ball Bearings 5x12x4mm – Precision Micro Bearings for Small Motors, Drones, RC Models & Smart Electronics

The MR125 series miniature deep groove ball bearings feature dimensions of 5mm (ID) × 12mm (OD) × 4mm (W), offering increased radial load capacity and enhanced stability in compact mechanical systems. Ideal for small motors, mini drones, RC vehicles, smart locks, wearable tech, cooling fans, and precision electronic instruments where reliable performance under moderate load is essential.

Available in multiple sealing configurations to suit your operating environment:

MR125: Open type – minimal friction, perfect for clean or controlled settings
MR125Z / MR125ZZ: Single or double metal shields – reduce dust ingress while retaining factory grease
MR125RS / MR125-2RS: Single or double rubber seals – provide superior protection against moisture, dust, and fine contaminants

Manufactured from high-grade stainless steel (AISI 440C) as standard—delivering excellent corrosion resistance—or chrome steel upon request. These micro bearings ensure smooth rotation, low noise, and consistent performance even at elevated speeds.

Commonly used in brushless DC (BLDC) motors, FPV drone gimbals, compact gearboxes, robotics joints, medical devices, and consumer electronics, the MR125 series benefits from its larger outer diameter (12mm) and 4mm width, delivering greater durability without sacrificing miniaturization.

🔧 Key Specifications:

Models: MR125, MR125Z, MR125ZZ, MR125RS, MR125-2RS
Dimensions: 5 × 12 × 4 mm
Material: Stainless Steel (standard); Chrome Steel optional
Precision Grade: ABEC-1 to ABEC-7 available
Ideal for: Small motors, drones, RC models, smart gadgets, and precision mechanisms

⚠️ Tip: Choose MR125-2RS for humid or dusty conditions; MR125ZZ for dry/dusty environments; open MR125 for ultra-high-speed or cleanroom applications.

Each bearing undergoes strict quality inspection and is packaged in anti-static containers. Available in single units or bulk packs — contact us for OEM or wholesale orders!

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