Manufactured by CHG Bearing, the NNU4084 is a precision Double Row Cylindrical Roller Bearings. Key dimensional parameters include a 420 mm bore diameter, a 620 mm outer diameter, and a 200 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.
NNU4084 - Double Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NNU4084 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Number of Rows | Double Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 420 mm |
| Width (B) | 200 mm |
| Outer Diameter (D) | 620 mm |
| Bore Diameter Tolerance | -0.045 – 0 mm |
| Outside Diameter Tolerance | -0.050 – 0 mm |
| Width Tolerance | -0.50 – 0 mm |
| Enveloping Circle Diameter Fw | 474 mm |
| Inner Ring Chamfer | 5 min mm |
| Outer Ring Chamfer | 5 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 3050 kN |
| Basic Static Load Rating C0 (kN) | 6570 kN |
| Material | |
| Mass (kg) | 203 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
NNU4084 620 mm 420 mm 474 mm 200 mm Frequently Asked Questions about NNU4084 Double Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
As standard production, CHG Bearing subjects NNU4084 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.
To safeguard CHG Bearing NNU4084 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (420 mm x 620 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
For international ocean and air freight, CHG Bearing packs NNU4084 with industrial VCI anti-corrosion barrier wrapping, sealed polybags, individual cartons, and fumigated ocean-worthy wooden crates. This multi-layer barrier guarantees rust-free storage for a minimum shelf life of 24 to 36 months.
To match diverse operational dynamics, CHG Bearing supplies NNU4084 with multiple cage configurations: high-strength pressed steel ribbon cages for standard duty, solid machined brass cages (M/CA) for heavy vibration and shock loads, or lightweight glass-fiber reinforced polyamide cages (TN9/TVP) for high acceleration and ultra-low noise.
