Manufactured by CHG Bearing, the 380688X2 is a precision Four-Row Tapered Roller Bearings. Key dimensional parameters include a 440 mm bore diameter, a 650 mm outer diameter, and a 355 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.
380688X2 - Four-Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 380688X2 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Four Row Tapered Roller Bearing |
| Number of Rows | Four Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 440 mm |
| Width (B) | 355 mm |
| Outer Diameter (D) | 650 mm |
| Bore Diameter Tolerance | -0.045 – 0 mm |
| Outside Diameter Tolerance | -0.075 – 0 mm |
| Inner Ring Chamfer | 6 min mm |
| Outer Ring Chamfer | 6 min mm |
| Inner Ring Assembly Width Tolerance | -0.9 – +0.9 mm |
| Outer Ring Assembly Width | 355 mm |
| Outer Ring Assembly Width Tolerance | -0.9 – +0.9 mm |
| Shaft Abutment Diameter | 468 mm |
| Housing Abutment Diameter | 618 mm |
| Lubrication Hole Diameter | 9 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 5260 kN |
| Basic Static Load Rating C0 (kN) | 13000 kN |
| Material | |
| Mass (kg) | 386 kg |
| Ring Material | Case-Hardened Steel / Bearing Steel |
| Rolling Element Material | Case-Hardened Steel / Bearing Steel |
| Cage Material | Grade 45 Steel / 08Al Steel / Grade 10 Steel |
| Lubrication Groove Width | 20 mm |
380688X2 650 mm 440 mm 355 mm Frequently Asked Questions about 380688X2 Four-Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Engineered according to international ISO boundary plans, CHG Bearing supplies 380688X2 with a precision bore diameter (d) of 440 mm, an outside diameter (D) of 650 mm, and a nominal ring width (B) of 355 mm. This configuration yields an effective cross-sectional wall thickness of 105.0 mm and an envelope ratio (D/d) of 1.48, delivering compact rigidity for OEM machinery housings.
In its sealed configuration (Open Type), CHG Bearing pre-charges 380688X2 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.
Absolutely. The CHG Bearing 380688X2 Four-Row Tapered Roller Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF 380688X2, FAG 380688X2, NSK 380688X2. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 380688X2 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.
