Manufactured by CHG Bearing, the 51256 is a precision Thrust Ball Bearings. Key dimensional parameters include a 280 mm bore diameter, a 380 mm outer diameter, and a mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
51256 - Thrust Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 51256 |
| Brand | CHG® |
| Construction | Angular Contact Thrust Ball Bearing |
| Type | Double-Direction Angular Contact Thrust Ball Bearing |
| Characteristics | |
| Load Direction | Axial — Double Direction |
| Limiting Speed — Grease (r/min) | 800 r/min |
| Limiting Speed — Oil (r/min) | 1100 r/min |
| Dimensions | |
| Bore Diameter (d) | 280 mm |
| Outer Diameter (D) | 380 mm |
| Contact Angle α (°) | N/A ° |
| Chamfer Dimension r (min.) | 3 mm |
| Dimension A | N/A mm |
| Bearing Height T | 144 mm |
| Dimension d1 | N/A mm |
| Dimension D12 | N/A mm |
| Dimension C | 72 mm |
| Dimension B | 36 mm |
| Chamfer Dimension r1 (min.) | 1 mm |
| Performance | |
| Basic Dynamic Axial Load Rating Ca (kN) | 405 kN |
| Basic Static Axial Load Rating C0a (kN) | 1920 kN |
| Material | |
| Mass (kg) | 55.5 kg |
51256 380 mm 280 mm 144 mm Frequently Asked Questions about 51256 Thrust Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Built for demanding industrial environments, the 51256 Thrust Ball Bearings by CHG Bearing boasts a dynamic load rating (Cr) of standard dynamic and a static load threshold (C0r) of standard static. The optimized internal raceway geometry balances stress distribution, mitigating edge loading even when operating under peak mechanical stresses.
In its sealed configuration (Open Type), CHG Bearing pre-charges 51256 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
The CHG Bearing 51256 is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
Absolutely. The CHG Bearing 51256 Thrust Ball Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF 51256, FAG 51256, NSK 51256. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
