MR104, MR104Z, MR104ZZ, MR104RS, MR104-2RS Miniature Deep Groove Ball Bearings 4x10x4mm – Precision Micro Bearings for Small Motors, Drones, RC Models & Smart Electronics

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MR104, MR104Z, MR104ZZ, MR104RS, MR104-2RS Miniature Deep Groove Ball Bearings 4x10x4mm – Precision Micro Bearings for Small Motors, Drones, RC Models & Smart Electronics

The MR104 series miniature deep groove ball bearings feature dimensions of 4mm (ID) × 10mm (OD) × 4mm (W), offering enhanced load capacity and stability in compact designs. Ideal for small motors, mini drones, RC cars/airplanes, smart locks, wearable tech, cooling fans, and precision electronic instruments where slightly higher radial loads are expected.

Available in multiple sealing options to match your operating environment:

MR104: Open type – minimal friction, best for clean or controlled settings
MR104Z / MR104ZZ: Single or double metal shields – reduce dust ingress while retaining factory grease
MR104RS / MR104-2RS: 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 reliable performance even at high speeds.

Commonly used in brushless DC (BLDC) motors, FPV drone gimbals, small gearboxes, robotics joints, medical devices, and consumer electronics, the MR104 series balances compact size with improved mechanical strength thanks to its wider 4mm width.

🔧 Key Specifications:

Models: MR104, MR104Z, MR104ZZ, MR104RS, MR104-2RS
Dimensions: 4 × 10 × 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 MR104-2RS for humid or dusty conditions; MR104ZZ for dry/dusty environments; open MR104 for ultra-high-speed or cleanroom applications.

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

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