Manufactured by CHG Bearing, the 380644/YB is a precision Four-Row Tapered Roller Bearings. Key dimensional parameters include a 220 mm bore diameter, a 295 mm outer diameter, and a 315 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.
380644/YB - Four-Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 380644/YB |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Four Row Tapered Roller Bearing |
| Number of Rows | Four Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 220 mm |
| Width (B) | 315 mm |
| Outer Diameter (D) | 295 mm |
| Bore Diameter Tolerance | -0.030 – 0 mm |
| Outside Diameter Tolerance | -0.035 – 0 mm |
| Inner Ring Chamfer | N/A mm |
| Outer Ring Chamfer | 3 min mm |
| Inner Ring Assembly Width Tolerance | -0.6 – +0.6 mm |
| Outer Ring Assembly Width | N/A mm |
| Outer Ring Assembly Width Tolerance | -0.6 – +0.6 mm |
| Shaft Abutment Diameter | 236 mm |
| Housing Abutment Diameter | 258 mm |
| Lubrication Hole Diameter | 5 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 1470 kN |
| Basic Static Load Rating C0 (kN) | 4360 kN |
| Material | |
| Mass (kg) | 56.6 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 | 10 mm |
380644/YB 295 mm 220 mm 315 mm Frequently Asked Questions about 380644/YB Four-Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
When fitting 380644/YB over a 220 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.
Standard batches of CHG Bearing 380644/YB conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
To safeguard CHG Bearing 380644/YB against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (220 mm x 295 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Model 380644/YB is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore 220 mm) and steep thermal gradients between inner and outer rings.
