Manufactured by CHG Bearing, the 380680/HC is a precision Four-Row Tapered Roller Bearings. Key dimensional parameters include a 400 mm bore diameter, a 540 mm outer diameter, and a 400 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.
380680/HC - Four-Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 380680/HC |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Four Row Tapered Roller Bearing |
| Number of Rows | Four Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 400 mm |
| Width (B) | 400 mm |
| Outer Diameter (D) | 540 mm |
| Bore Diameter Tolerance | -0.04 – 0 mm |
| Outside Diameter Tolerance | -0.05 – 0 mm |
| Inner Ring Chamfer | 5 min mm |
| Outer Ring Chamfer | 5 min mm |
| Inner Ring Assembly Width Tolerance | -1.6 – +1.6 mm |
| Outer Ring Assembly Width | 400 mm |
| Outer Ring Assembly Width Tolerance | -1.6 – +1.6 mm |
| Shaft Abutment Diameter | 420 mm |
| Housing Abutment Diameter | 510 mm |
| Lubrication Hole Diameter | 8 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 4590 kN |
| Basic Static Load Rating C0 (kN) | 13970 kN |
| Material | |
| Mass (kg) | 256 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 | 15 mm |
380680/HC 540 mm 400 mm 400 mm Frequently Asked Questions about 380680/HC Four-Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To extend the trouble-free lifespan of CHG Bearing 380680/HC, 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.
As standard production, CHG Bearing subjects 380680/HC to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
When fitting 380680/HC over a 400 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.
The Open Type engineered for 380680/HC by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
