| Part Number | NU 311 ECM/HC5C3 |
| System of Measurement | Metric |
| Bearing Type | Ball |
| For Load Direction | Radial |
| Construction | Single Row |
| Inner Ring Type | Standard |
| Seal Type | Open |
| Bore Dia | 55 mm |
| Outer Dia | 120 mm |
| Width | 29 mm |
| Ring Material | Chrome Steel |
| Balls Material | Silicon Nitride(Si3N4) |
| Dynamic Radial Load | 31024 lbf |
| Static Radial Load | 32148 lbf |
| Max Speed (X1000 rpm) | 9 |
| Lubrication | Required |
| Shaft Mount Type | Press Fit |
| Temperature Range | -86 to 230 °F |
| Radial Clearance Trade No | MC3 |
| Reference Speed | 5600 r/min |
| Calculation Factor | 0.15 |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 1.15 kg |
| Chamfer Dimension (r1 2)(min) | 2 mm |
| Fatigue Load Limit (Pu) | 16 kN |
| Abutment Diameter Shaft (da)(min) | 66 mm |
| Abutment Diameter Shaft (da)(max) | 68 mm |
| Abutment Diameter Housing (Da)(max) | 109 mm |
| Fillet Radius (ra)(max) | 2 mm |
| Shoulder Diameter Outer Ring (D1) | 101 mm |
| Raceway Diameter Inner Ring (F) | 70.5 mm |
| Permissible Axial Displacement(s)(max) | 2 mm |
| Chamfer Dimension (r3,4)(min) | 2 mm |
| Abutment Diameter Shaft (db)(min) | 73 mm |
| Fillet Radius (rb)(max) | 2 mm |