Manufactured by CHG Bearing, the 51248 is a precision Thrust Ball Bearings. Key dimensional parameters include a 240 mm bore diameter, a 340 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.
51248 - Thrust Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 51248 |
| 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) | 1000 r/min |
| Limiting Speed — Oil (r/min) | 1400 r/min |
| Dimensions | |
| Bore Diameter (d) | 240 mm |
| Outer Diameter (D) | 340 mm |
| Contact Angle α (°) | N/A ° |
| Chamfer Dimension r (min.) | 2 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.) | 1 mm |
| Performance | |
| Basic Dynamic Axial Load Rating Ca (kN) | 315 kN |
| Basic Static Axial Load Rating C0a (kN) | 1390 kN |
| Material | |
| Mass (kg) | 30 kg |
51248 340 mm 240 mm 120 mm Frequently Asked Questions about 51248 Thrust Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Yes, 100% of 51248 Thrust Ball Bearings leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
Beyond standard alloy steel, CHG Bearing can customize the 51248 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.
In its sealed configuration (Open Type), CHG Bearing pre-charges 51248 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.
To ensure optimum performance of CHG Bearing 51248 Thrust Ball Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 240 mm bore. For the 340 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
