Manufactured by CHG Bearing, the NN3122 is a precision Double Row Cylindrical Roller Bearings. Key dimensional parameters include a 110 mm bore diameter, a 180 mm outer diameter, and a 56 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.
NN3122 - Double Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN3122 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Number of Rows | Double Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 110 mm |
| Width (B) | 56 mm |
| Outer Diameter (D) | 180 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 | 162 mm |
| Inner Ring Chamfer | 2 min mm |
| Outer Ring Chamfer | 2 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 254 kN |
| Basic Static Load Rating C0 (kN) | 397 kN |
| Material | |
| Mass (kg) | 5.63 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
NN3122 180 mm 110 mm 56 mm 162 mm Frequently Asked Questions about NN3122 Double Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Quality starts with raw material selection: CHG Bearing crafts NN3122 inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
Standard batches of CHG Bearing NN3122 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.
As standard production, CHG Bearing subjects NN3122 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 NN3122 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (110 mm x 180 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
