Manufactured by CHG Bearing, the 51138 is a precision Thrust Ball Bearings. Key dimensional parameters include a 190 mm bore diameter, a 240 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.
51138 - Thrust Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 51138 |
| 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) | 1400 r/min |
| Limiting Speed — Oil (r/min) | 1900 r/min |
| Dimensions | |
| Bore Diameter (d) | 190 mm |
| Outer Diameter (D) | 240 mm |
| Contact Angle α (°) | N/A ° |
| Chamfer Dimension r (min.) | 2.1 mm |
| Dimension A | N/A mm |
| Bearing Height T | 120 mm |
| Dimension d1 | N/A mm |
| Dimension D12 | N/A mm |
| Dimension C | 60 mm |
| Dimension B | 30 mm |
| Chamfer Dimension r1 (min.) | 0.6 mm |
| Performance | |
| Basic Dynamic Axial Load Rating Ca (kN) | 281 kN |
| Basic Static Axial Load Rating C0a (kN) | 1020 kN |
| Material | |
| Mass (kg) | 23.4 kg |
51138 240 mm 190 mm 120 mm Frequently Asked Questions about 51138 Thrust Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 51138 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.
Absolutely. The CHG Bearing 51138 Thrust Ball Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF 51138, FAG 51138, NSK 51138. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
Quality starts with raw material selection: CHG Bearing crafts 51138 inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
To safeguard CHG Bearing 51138 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (190 mm x 240 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
