MR128, MR128Z, MR128ZZ, MR128RS, MR128-2RS Miniature Deep Groove Ball Bearings 8x12x3.5mm – Precision Micro Bearings for Small Motors, Drones, RC Models & Smart Electronics

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MR128, MR128Z, MR128ZZ, MR128RS, MR128-2RS Miniature Deep Groove Ball Bearings 8x12x3.5mm – Precision Micro Bearings for Small Motors, Drones, RC Models & Smart Electronics

The MR128 series miniature deep groove ball bearings feature compact yet robust dimensions of 8mm (ID) × 12mm (OD) × 3.5mm (W), offering reliable support for 8mm shafts in space-constrained applications. Ideal for small motors, mini drones, RC vehicles, smart locks, wearable tech, cooling fans, and precision electronic mechanisms.

Available in multiple sealing configurations to suit your operating environment:

MR128: Open type – minimal friction, perfect for clean or controlled settings
MR128Z / MR128ZZ: Single or double metal shields – reduce dust ingress while retaining factory grease
MR128RS / MR128-2RS: 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 instruments, and consumer electronics, the MR128 series balances a relatively large bore (8mm) with a narrow 12mm outer diameter—ideal for designs requiring strong shaft support without excessive radial space.

🔧 Key Specifications:

Models: MR128, MR128Z, MR128ZZ, MR128RS, MR128-2RS
Dimensions: 8 × 12 × 3.5 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 MR128-2RS for humid or dusty conditions; MR128ZZ for dry/dusty environments; open MR128 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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