6702, 6702Z, 6702ZZ, 6702RS, 6702-2RS Ball Bearings 15x21x4mm – Miniature Deep Groove Ball Bearings for Precision Instruments & Compact Mechanical Devices

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6702, 6702Z, 6702ZZ, 6702RS, 6702-2RS Ball Bearings 15x21x4mm – Miniature Deep Groove Ball Bearings for Precision Instruments & Compact Mechanical Devices

High-precision 6702 series miniature ball bearings in size 15mm (ID) × 21mm (OD) × 4mm (W), engineered for compact, high-speed, and low-friction applications. Available in multiple sealed and shielded versions to suit diverse operating environments:

6702: Open type – ideal for applications requiring re-lubrication or custom sealing

6702Z / 6702ZZ (6702-2Z): Single or double metal shields – provide excellent protection against dust and help retain lubricant

6702RS / 6702-2RS: Single or double rubber seals – offer superior resistance to moisture, dirt, and contaminants

Constructed from high-quality chrome steel (GCr15), these bearings feature precision-ground raceways for smooth, quiet operation and long service life under light radial loads. Commonly used in small motors, power tools, drones, RC vehicles, office machines, medical devices, robotics, 3D printers, and precision instruments.

Most sealed models come pre-lubricated with high-performance grease for maintenance-free performance. The 6702 series supports both radial and limited axial loads, making it ideal for compact, high-speed mechanical systems requiring reliability and efficiency.

🔧 Key Specifications:

Models: 6702, 6702Z, 6702ZZ (6702-2Z), 6702RS, 6702-2RS

Dimensions: 15 × 21 × 4 mm

Material: Chrome Steel (GCr15)

Precision Rating: ABEC-1 (ISO P0)

Ideal for: High-speed, low-noise, space-constrained applications

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