6311, 6311Z, 6311ZZ, 6311RS, 6311-2RS Ball Bearings 55x120x29mm – Deep Groove Ball Bearings for Industrial & Mechanical Applications

6311, 6311Z, 6311ZZ, 6311RS, 6311-2RS Ball Bearings 55x120x29mm – Deep Groove Ball Bearings for Industrial & Mechanical Applications

Complete 6311 series deep groove ball bearings in standard size 55mm (ID) × 120mm (OD) × 29mm (W), available in multiple configurations for reliable performance in heavy-duty industrial, automotive, and mechanical systems:

• 6311: Open type – ideal for applications requiring re-lubrication or custom sealing
• 6311Z / 6311ZZ (6311-2Z): Single or double metal shields – provide effective protection against dust and help retain lubricant
• 6311RS / 6311-2RS: 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, agricultural machinery, construction equipment, and industrial power transmission systems.

Most sealed versions are pre-lubricated with high-performance grease for maintenance-free operation. The 6311 series supports both radial and limited axial loads, making it a versatile solution for OEMs, replacements, and repair needs.

🔧 Key Specifications:

• Models: 6311, 6311Z, 6311ZZ (6311-2Z), 6311RS, 6311-2RS
• Dimensions: 55 × 120 × 29 mm
• Material: Chrome Steel (GCr15)
• Precision Rating: ABEC-1 (ISO P0)
• Temperature Range: -30°C to +110°C (varies by seal and lubricant)