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604, 604Z, 604ZZ, 604RS, 604-2RS Ball Bearings 4x12x4mm – Full Series Deep Groove Bearings for Motors & Equipment

604, 604Z, 604ZZ, 604RS, 604-2RS Ball Bearings 4x12x4mm – Full Series Deep Groove Bearings for Motors & Equipment

604, 604Z, 604ZZ, 604RS, 604-2RS Ball Bearings 4x12x4mm – Full Series Deep Groove Bearings for Motors & Equipment
The Quick Details

604, 604Z, 604ZZ, 604RS, 604-2RS Ball Bearings 4x12x4mm – Full Series Deep Groove Bearings for Motors & Equipment


Complete 604 series deep groove ball bearings in standard size 4mm (ID) × 12mm (OD) × 4mm (W), available in multiple configurations to suit various operating environments:

  • 604: Open type – ideal for applications requiring re-lubrication or custom sealing
  • 604Z / 604ZZ (604-2Z): Single or double metal shields – provide effective dust protection and grease retention
  • 604RS / 604-2RS: Single or double rubber seals – offer superior resistance to moisture, water, and contaminants

Made from high-quality chrome steel (GCr15), all variants feature precision-ground raceways for smooth, low-noise rotation and reliable performance at high speeds. Ideal for use in electric motors, fans, pumps, power tools, fitness machines, small machinery, and household appliances.

Most sealed models come pre-lubricated with high-performance grease for maintenance-free operation. The 604 series handles both radial and moderate axial loads, making it a versatile solution for industrial, commercial, and DIY applications.

🔧 Key Specifications:

  • Models: 604, 604Z, 604ZZ (604-2Z), 604RS, 604-2RS
  • Dimensions: 4 × 12 × 4 mm
  • Material: Chrome Steel (GCr15)
  • Precision Rating: ABEC-1 (ISO P0)
  • Temperature Range: -30°C to +110°C (depending on lubricant)



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