Manufactured by CHG Bearing, the NNU4996 is a precision Double Row Cylindrical Roller Bearings. Key dimensional parameters include a 480 mm bore diameter, a 650 mm outer diameter, and a 170 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.
NNU4996 - Double Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NNU4996 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Number of Rows | Double Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 480 mm |
| Width (B) | 170 mm |
| Outer Diameter (D) | 650 mm |
| Bore Diameter Tolerance | -0.045 – 0 mm |
| Outside Diameter Tolerance | -0.075 – 0 mm |
| Width Tolerance | -0.75 – 0 mm |
| Enveloping Circle Diameter Fw | 525 mm |
| Inner Ring Chamfer | 5 min mm |
| Outer Ring Chamfer | 5 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 2460 kN |
| Basic Static Load Rating C0 (kN) | 5970 kN |
| Material | |
| Mass (kg) | 161 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
NNU4996 650 mm 480 mm 525 mm 170 mm Frequently Asked Questions about NNU4996 Double Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Each NNU4996 produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (480 mm bore side) ensures perfect planar contact without edge binding.
To safeguard CHG Bearing NNU4996 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (480 mm x 650 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Absolutely. The CHG Bearing NNU4996 Double Row Cylindrical Roller Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF NNU4996, FAG NNU4996, NSK NNU4996. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for NNU4996. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
