Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications12 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | NA4903 | |
| Bore diameter | d | 17 mm |
| Outside diameter | D | 30 mm |
| Width | B | 13 mm |
| Basic dynamic load rating | C | 12.4 kN |
| Basic static load rating | C0 | 14.6 kN |
| Fatigue load limit | Pu | 2.65 kN |
| Reference speed | nref | 10200 r/min |
| Limiting speed | nG | 20000 r/min |
| Mass | ≈m | 0.0385 kg |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 120 °C |
Manufacturer Identity4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 393853 | |
| Brand | INA | |
| Base Type | NA4903 | |
| X Life Marking | XL |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Radial roller bearing NA..-XL | |
| Short Description | Radial roller bearing |
Technical Data14 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Outside Diamater (D) | 30 mm | |
| Total Width (B) | 13 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 12,400 N | |
| Basic Static Load Rating, Radial (C0R) | 14,600 N | |
| Raceway Diameter Inner Ring (F) | 22 mm | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 12,000 1/min | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Limiting Speed (Limiting Spe) | 20,000 1/min | |
| Reference Speed (Nϑr) | 10,200 1/min | |
| Axial Displacement (S) | 0.5 mm | |
| Bore Diameter (D) | 17 mm | |
| Minimum Chamfer Dimension (Rmin) | 0.3 mm | |
| Fatigue Load Limit, Radial (Cur) | 2,650 N |
