Manufactured by CHG Bearing, the HKB020AP4 is a precision Thin Section Angular Contact Ball Bearings. Key dimensional parameters include a 50.8 mm bore diameter, a 66.675 mm outer diameter, and a 7.9375 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.
HKB020AP4 - Thin Section Angular Contact Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | HKB020AP4 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Angular Contact Ball Bearing |
| Series | KB |
| Seal Type | Open |
| Load Direction | Combined Radial and Unidirectional Axial |
| Row Configuration | Single Row |
| Dimensions | |
| Bore Diameter (d) | 50.8 mm |
| Width (B) | 7.9375 mm |
| Outer Diameter (D) | 66.675 mm |
| Bore Diameter Tolerance | -0.005-0 mm |
| Outside Diameter Tolerance | -0.005-0 mm |
| Width Tolerance | -0.127-0 mm |
| Inner-Ring Land Diameter (L1 / d1) | 56.6674 mm |
| Outer-Ring Land Diameter (L2 / D1) | 60.7822 mm |
| Counterbore Diameter L3 | 62.5856 mm |
| Performance | |
| Basic Static Radial Load Rating C0r (N) | 4850 N |
| Basic Dynamic Radial Load Rating Cr (N) | 2670 N |
| Basic Static Axial Load Rating C0a (N) | 14000 N |
| Basic Dynamic Axial Load Rating Ca (N) | 6130 N |
| Material | |
| Mass (kg) | 0.068 kg |
| Ring Material | Stainless Steel / Bearing Steel |
| Cage Material | Brass / PEEK / Polyimide / Phenolic Resin Fabric Laminate |
| Ball Material | Stainless Steel / Bearing Steel / Ceramic |
| Operating Temperature Range (°C) | -50 to +100 °C °C |
| Precision Class | P4 |
| Radial Internal Clearance | N/A mm |
HKB020AP4 66.675 mm 50.8 mm 7.9375 mm Frequently Asked Questions about HKB020AP4 Thin Section Angular Contact Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
When fitting HKB020AP4 over a 50.8 mm shaft, CHG Bearing strictly recommends uniform induction heating (controlled between 90°C and 110°C) or precision hydraulic press sleeves. Under no circumstances should direct impact blows be struck against the rings or cage, as shock loads cause brinelling indents and premature spalling.
In its sealed configuration (Open), CHG Bearing pre-charges HKB020AP4 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.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing HKB020AP4 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.
To safeguard CHG Bearing HKB020AP4 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (50.8 mm x 66.675 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
