| model | NJ 304 ECP |
| Metering system | Metric system |
| Roller Bearing Type | Cylindrical |
| Load Direction | Radial force and axial force |
| Structure | Single Column |
| Inner Ring Type | With inner ring |
| Seal Type | Open |
| Inside Diameter | 20 mm |
| Inner Diameter Tolerance | -0.01mm to 0 |
| Outer Diameter | 52 mm |
| Outer Diameter Tolerance | -0.013mm to 0 |
| Width | 15 mm |
| Width Tolerance | -0.12mm to 0 |
| Inner ring shoulder diameter | 31.2 mm |
| Outer ring shoulder diameter | 41.85 mm |
| Inner ring raceway diameter | 27.5 mm |
| Chamfer size r1,2(min) | 1.1 mm |
| Chamfer size r3,4(min) | 0.6 mm |
| Allowable Axial Displacement (Max) | 0.9 mm |
| Ferrule Material | 51200 Chrome steel |
| Roller material | 51200 Chrome steel |
| Cage Material | PA66 cage, roller center |
| Dynamic Radial Load | 35.5 kN |
| Static Radial Load | 26 kN |
| Max Speed(X1000 rpm) | 18 |
| Lubricant | Grease、Engine Oil |
| Temperature Range | -30° to 110 °C |
| RoHS Standard | Conform |
| REACH Standard | Conform |
| Weight | 0.15 kg |