Manufactured by CHG Bearing, the 51148 is a precision Thrust Ball Bearings. Key dimensional parameters include a 240 mm bore diameter, a 300 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.
51148 - Thrust Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 51148 |
| 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) | 300 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) | 360 kN |
| Basic Static Axial Load Rating C0a (kN) | 1450 kN |
| Material | |
| Mass (kg) | 44 kg |
51148 300 mm 240 mm 144 mm Frequently Asked Questions about 51148 Thrust Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Each 51148 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 (240 mm bore side) ensures perfect planar contact without edge binding.
Engineered according to international ISO boundary plans, CHG Bearing supplies 51148 with a precision bore diameter (d) of 240 mm, an outside diameter (D) of 300 mm, and a nominal ring width (B) of mm. This configuration yields an effective cross-sectional wall thickness of 0 mm and an envelope ratio (D/d) of 0, delivering compact rigidity for OEM machinery housings.
To safeguard CHG Bearing 51148 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (240 mm x 300 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
To ensure optimum performance of CHG Bearing 51148 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 300 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
