51224 Flat Thrust Bearing High Precision Axial Load Ball Bearing

The 51224 Thrust Ball Bearing is a high-precision axial load solution designed for demanding industrial applications.

• Bore diameter (d): 120mm
• Outer diameter (D): 170mm
• Thickness (T): 39mm (single bearing)
• Type: Single-direction thrust ball bearing (51000 series)
• Weight: Approximately 3.58kg (e.g., NSK 51224)
• Structure: Single-row, non-separable design with flat housing washer, shaft washer, and steel balls

• Dynamic load rating (Cr): 141-154kN (varies by brand)
• Static load rating (C0r): 430-470kN (NACHI models reach 470kN)
• Material: GCr15/SUJ2 high-carbon chromium bearing steel (surface hardness HRC58-62)

• Limiting speed: 1,200rpm (grease-lubricated), 1,800rpm (oil-lubricated)
• Precision class: Standard P0; customizable to P4 for precision equipment

• Axial load-oriented: Withstands unidirectional axial force only
• Low-friction design: Optimized raceway curvature and cage structure

• Mounting fit: Shaft: h8, Housing bore: H8
• Temperature range: Standard: -20°C to 120°C, High-temperature: up to 200°C
• Sealing options: Open, 2RS (double rubber seals), or ZZ (double metal shields)

• Industrial Machinery: Presses, forging equipment, gearboxes, machine tool spindles
• Transportation: Automotive clutch release bearings, railway freight car axle boxes
• Precision Equipment: Medical devices, food packaging machinery

• Lubrication options: Grease lubrication (lithium-based) or oil lubrication (ISO VG 46-68)
• Lubrication interval: Normal: 8,000-12,000 hours, High-temperature: 4,000 hours

• Standards compliance: ISO 9001:2015 quality management system, CE-certified models available
• Cross-brand replacement: Interchangeable with NSK 51224, NACHI 51224, HRB 51224

• Material upgrades: Ceramic hybrid bearings, stainless steel (SUS440C)
• Special designs: Phosphating coating, laser marking for IIoT tracking

• Load direction: Single-direction design requires paired mounting for bidirectional forces
• Fit precision: Control cylindricity error within 0.01mm
• Temperature compensation: Reserve 0.03-0.05mm axial expansion clearance