Manufactured by CHG Bearing, the 51240 is a precision Thrust Ball Bearings. Key dimensional parameters include a 200 mm bore diameter, a 280 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.
51240 - Thrust Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 51240 |
| 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) | 1200 r/min |
| Limiting Speed — Oil (r/min) | 1700 r/min |
| Dimensions | |
| Bore Diameter (d) | 200 mm |
| Outer Diameter (D) | 280 mm |
| Contact Angle α (°) | N/A ° |
| Chamfer Dimension r (min.) | 2.1 mm |
| Dimension A | N/A mm |
| Bearing Height T | 132 mm |
| Dimension d1 | N/A mm |
| Dimension D12 | N/A mm |
| Dimension C | 66 mm |
| Dimension B | 33 mm |
| Chamfer Dimension r1 (min.) | 0.6 mm |
| Performance | |
| Basic Dynamic Axial Load Rating Ca (kN) | 315 kN |
| Basic Static Axial Load Rating C0a (kN) | 1180 kN |
| Material | |
| Mass (kg) | 31.5 kg |
51240 280 mm 200 mm 132 mm Frequently Asked Questions about 51240 Thrust Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
In its sealed configuration (Open Type), CHG Bearing pre-charges 51240 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 Open Type engineered for 51240 by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 51240 correlates its dynamic capacity (standard dynamic) with equivalent dynamic loads. In controlled industrial settings with proper contamination-free filtration, field data confirms continuous operational longevity exceeding 20,000 to 50,000 service hours.
Model 51240 is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore 200 mm) and steep thermal gradients between inner and outer rings.
