Manufactured by CHG Bearing, the 51238 is a precision Thrust Ball Bearings. Key dimensional parameters include a 190 mm bore diameter, a 270 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.
51238 - Thrust Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 51238 |
| 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) | 2000 r/min |
| Dimensions | |
| Bore Diameter (d) | 190 mm |
| Outer Diameter (D) | 270 mm |
| Contact Angle α (°) | N/A ° |
| Chamfer Dimension r (min.) | 2 mm |
| Dimension A | N/A mm |
| Bearing Height T | 84 mm |
| Dimension d1 | N/A mm |
| Dimension D12 | N/A mm |
| Dimension C | 42 mm |
| Dimension B | 21 mm |
| Chamfer Dimension r1 (min.) | 1 mm |
| Performance | |
| Basic Dynamic Axial Load Rating Ca (kN) | 161 kN |
| Basic Static Axial Load Rating C0a (kN) | 695 kN |
| Material | |
| Mass (kg) | 11 kg |
51238 270 mm 190 mm 84 mm Frequently Asked Questions about 51238 Thrust Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To extend the trouble-free lifespan of CHG Bearing 51238, preventive maintenance routines should monitor operating housing temperature (normally maintaining below 70°C) and conduct regular vibration FFT analysis to identify early raceway micro-pitting before unexpected line halts occur.
Beyond standard alloy steel, CHG Bearing can customize the 51238 Thrust Ball Bearings using AISI 440C stainless steel, black oxide coating, zinc-nickel plating, or hybrid ceramic (Si3N4) balls for applications involving chemical exposure, marine salt fog, or galvanic current hazards.
Each 51238 produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (190 mm bore side) ensures perfect planar contact without edge binding.
In its sealed configuration (Open Type), CHG Bearing pre-charges 51238 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.
