Manufactured by CHG Bearing, the NN3120 is a precision Double Row Cylindrical Roller Bearings. Key dimensional parameters include a 100 mm bore diameter, a 165 mm outer diameter, and a 52 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.
NN3120 - Double Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN3120 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Number of Rows | Double Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 100 mm |
| Width (B) | 52 mm |
| Outer Diameter (D) | 165 mm |
| Bore Diameter Tolerance | -0.020 – 0 mm |
| Outside Diameter Tolerance | -0.025 – 0 mm |
| Width Tolerance | -0.25 – 0 mm |
| Enveloping Circle Diameter Fw | 149 mm |
| Inner Ring Chamfer | 2 min mm |
| Outer Ring Chamfer | 2 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 230 kN |
| Basic Static Load Rating C0 (kN) | 354 kN |
| Material | |
| Mass (kg) | 4.41 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
NN3120 165 mm 100 mm 52 mm 149 mm Frequently Asked Questions about NN3120 Double Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
In its sealed configuration (Open Type), CHG Bearing pre-charges NN3120 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
Each NN3120 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 (100 mm bore side) ensures perfect planar contact without edge binding.
As standard production, CHG Bearing subjects NN3120 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.
The Open Type engineered for NN3120 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.
