NU232ECM/C4HVA3091 Bore 160 Mm, INSOCOAT Cylindrical Roller Bearings, Single Row For Railway Vehicle
The NU232ECM/C4HVA3091 Axle box: Connects the wheels to the bogie, bearing vehicle loads and guiding forces. Commonly used bearings include cylindrical roller bearings, tapered roller bearings, and self-aligning roller bearings.
Traction motor: Supports the high-speed rotation of the motor rotor and requires insulation to prevent electrolytic corrosion. Commonly used bearings include deep groove ball bearings, angular contact ball bearings, and insulated cylindrical roller bearings.
Gearbox: Transmits traction power and withstands high speeds and impact loads. Commonly used bearings are a combination of cylindrical roller bearings and deep groove ball bearings.
Axle bearing (motor suspension bearing): Transmits the torque of the traction motor to the axle and accommodates axle bending. Commonly used bearings include self-aligning roller bearings or cylindrical roller bearings.
The NU232ECM/C4HVA3091 bearing is a INSOCOAT cylindrical roller bearings, single row for railway vehicle with an inner diameter of 160 mm , an outer diameter of 290 mm, a width of 48 mm. It typically uses PN grade precision tolerances and GCr15SiMn rings, GCr15SiMn rolling mlement. Its dynamic radial rated load is approximately 584828 N, its static radial rated load is approximately 678780 N. It uses C4H standard radial clearance, Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
NU232ECM/C4HVA3091 bearings ( 160 mm x 290 mm x 48 mm) have the advantages of Ultra-high reliability, long lifespan, maintenance-free operation, and adaptability to extreme conditions, and are therefore widely used in the Railway vehicle axle boxes, traction motors, gearboxes and wheelset systems.
| Part Number | NU232ECM/C4HVA3091 |
| Interchangeable | SKF NU232ECM/C4HVA3091 |
| Cage | M = a machined brass cage, riveted, roller centred |
| Bearing Type | INSOCOAT cylindrical roller bearings, single row for railway vehicle |
| Load | radial |
| Accuracy class | PN |
| Coating | VA3091 = outer surfaces, aluminium oxide coated (for railway vehicle traction motors) |
| Bearing part | Complete |
| Internal design | EC = Optimized internal design incorporating more and/or larger rollers and with modified roller end / flange contact |
| Design | NU |
| Internal clearance | C4H |
| Row NO. | One |
| Seal | Open |
| Number of ring | outer ring(2), inner ring(0) |
| Units | Metric |
| Manufacturer Part Code | NU 232 ECM/C4HVA3091 |
| Series | NU 2 series (NU 2.. ECM/C4HVA3091) |
| Lubrication | NO |
| Locating feature | NO |
| Application | Traction motor |
| Relubrication feature | NO |
| Loose flange | NO |
| Weight [lb] | 32.1210 |
| Cr Radial Dynamic [lbf] | 131469 |
| C0r Radial Static [lbf] | 152589 |
| nG Speed ratings (oil) [rpm] | 2523 |
| d φ Inside [inch] | 6.2992 |
| D Φ Outside [inch] | 11.4173 |
| B Thickness [inch] | 1.8898 |
| Axial displacement capability | In both directions |
Cylindrical roller bearings: High radial load capacity, suitable for high speeds, used in high-speed train axle boxes, traction motors, and gearboxes.
Tapered roller bearings: Capable of both radial and axial heavy loads, high rigidity, used in freight cars, locomotives, and high-speed train axle boxes.
Deep groove ball bearings: Simple structure, high speed, maintenance-free, used in traction motors and gearboxes.
Spherical roller bearing: Self-aligning, high load capacity, impact resistant, used in locomotive axle boxes and traction motor bearings.
Angular contact ball bearings: High precision, low friction, suitable for high-speed axial loads, used in high-performance traction motors and engines.
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