634, 634Z, 634ZZ, 634RS, 634-2RS Ball Bearings 4x16x5mm – Deep Groove Bearings for Industrial & Mechanical Equipment

634, 634Z, 634ZZ, 634RS, 634-2RS Ball Bearings 4x16x5mm – Deep Groove Bearings for Industrial & Mechanical Equipment

Complete 634 series deep groove ball bearings in standard size 4mm (ID) × 16mm (OD) × 5mm (W), available in multiple configurations for reliable performance in industrial, automotive, and mechanical applications:

• 634: Open type – ideal for applications requiring re-lubrication or custom sealing
• 634Z / 634ZZ (634-2Z): Single or double metal shields – provide effective protection against dust and help retain lubricant
• 634RS / 634-2RS: Single or double rubber seals – offer superior resistance to water, moisture, and contaminants

Made from high-quality chrome steel (GCr15), all models feature precision-ground raceways for smooth, low-noise operation and long service life under radial loads and moderate to high speeds. Widely used in electric motors, pumps, fans, gearboxes, compressors, conveyors, power tools, and industrial machinery.

Most sealed versions are pre-lubricated with high-performance grease for maintenance-free operation. The 634 series supports both radial and limited axial loads, making it a versatile solution for OEMs, replacements, and repair applications.

🔧 Key Specifications:

• Models: 634, 634Z, 634ZZ (634-2Z), 634RS, 634-2RS
• Dimensions: 4 × 16 × 5 mm
• Material: Chrome Steel (GCr15)
• Precision Rating: ABEC-1 (ISO P0)
• Temperature Range: -30°C to +110°C (varies by seal and lubricant)