Manufactured by CHG Bearing, the NNCF4976V is a precision Full Complement Cylindrical Roller Bearings. Key dimensional parameters include a 380 mm bore diameter, a 520 mm outer diameter, and a 140 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.
NNCF4976V - Full Complement Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NNCF4976V |
| Brand | CHG® |
| Rolling Element | Cylindrical Roller |
| Construction | Double Row; Full Complement (No Cage) |
| Characteristics | |
| Bearing Type | Double-Row Full-Complement Cylindrical Roller Bearing |
| Series | NNCF |
| Load Direction | Radial |
| Limiting Speed — Grease (r/min) | 260 r/min |
| Limiting Speed — Oil (r/min) | 500 r/min |
| Dimensions | |
| Bore Diameter (d) | 380 mm |
| Width (B) | 140 mm |
| Outer Diameter (D) | 520 mm |
| Raceway Diameter Ew | 481.5 mm |
| Performance | |
| Basic Dynamic Radial Load Rating Cr (kN) | 2180 kN |
| Basic Static Radial Load Rating C0r (kN) | 5650 kN |
| Material | |
| Mass (kg) | 90.5 kg |
| Chamfer Dimension r1,2 (min.) | 4 min. mm |
| Chamfer Dimension r3,4 (min.) | N/A min. mm |
NNCF4976V 380 mm 520 mm 140 mm Frequently Asked Questions about NNCF4976V Full Complement Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Model NNCF4976V 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 380 mm) and steep thermal gradients between inner and outer rings.
As standard production, CHG Bearing subjects NNCF4976V 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.
Engineered according to international ISO boundary plans, CHG Bearing supplies NNCF4976V with a precision bore diameter (d) of 380 mm, an outside diameter (D) of 520 mm, and a nominal ring width (B) of 140 mm. This configuration yields an effective cross-sectional wall thickness of 70.0 mm and an envelope ratio (D/d) of 1.37, delivering compact rigidity for OEM machinery housings.
Standard batches of CHG Bearing NNCF4976V 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.
