Nj211 Bearing

1.Product Introduction: Model NJ211, with an inner diameter of 55mm, the inner ring has a single rib, suitable for small positioning shaft systems.
2.Structure Type: The outer ring has double ribs, the inner ring has a single rib, with a single row of rollers + cage, and it is open - type.
3.Size Range: Inner diameter 55mm, outer diameter 100mm, width 21mm.
4.Material: Inner ring /outer ring /rollers: GCr15/GCR15SIMN/20Cr2Ni4A, cage: stamped steel /brass.
5.Precision: P0 level, precision version is P6/P5 level.
6.Application Fields: Small electric motors, reducers, machine tool feed shafts, automobile auxiliary transmission systems.
7.Key Inspection Items: Radial clearance (0.01 - 0.03mm), axial load-bearing capacity, dimensional accuracy.

Product Description

NJ211 Bearing: High-Performance Solution for Extreme Industrial Demands

When your machinery operates under relentless stress—high temperatures, heavy radial loads, or corrosive environments—the NJ211 bearing stands as a trusted ally. Engineered for precision and durability, this cylindrical roller bearing combines a 55mm bore, 100mm outer diameter, and 21mm width with advanced heat treatment and material science. Ideal for metallurgical equipment, port machinery, and heavy-duty industrial systems, the NJ211 delivers unmatched performance in extreme conditions.

Technical Specifications

Parameter Value
Bore Diameter 55mm standard sizing
Outer Diameter & Width 100mm outer diameter, 21mm width
Load Rating Dynamic load rating up to 63.4 kN
Precision Grades P0 (Standard), P6/P5 (High-Precision bearing accuracy)

Key Advantages

  • Extreme Conditions: Crafted from high-purity GCr15 bearing steel and carburizing treatments to resist wear under 150°C.
  • Customization Agility: Modify roller bearing dimensions (±5mm OD) or upgrade to stainless steel within 72 hours.
  • Robust Quality Assurance: Every NJ211 cylindrical roller bearing undergoes material spectroscopy, HRC 60-64 hardness testing, and vibration analysis.

Industry-Proven Applications

  • Rolling Mills & Continuous Casting: High heat resistance ensures stable operation in smelting furnace bearing setups.
  • Port Machinery: Double-ribbed outer rings and reinforced roller cages support moderate axial loads alongside heavy radial forces.
  • Heavy-Duty Gearboxes: Precision-ground bearings reduce vibration and enhance overall mechanical reliability.

Logistics & Support

With 500+ NJ211 units in stock across regional hubs, 80% of standard bearing orders ship in 48 hours. We provide 24/7 remote troubleshooting and IoT predictive maintenance support.

FAQs

Q: Can the NJ211 bearing handle axial loads in port machinery?
A: Yes, its double-ribbed outer ring and reinforced roller cage design support moderate axial loads alongside heavy radial forces.

Q: How quickly can you deliver this cylindrical roller bearing to North America?
A: Standard NJ211 orders ship from our Texas warehouse in 24-48 hours.

Q: What lubrication is recommended for high-temperature NJ211 variants?
A: We recommend synthetic high-temperature grease for environments exceeding 150°C.

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