Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | ZARN2557 | |
| Bore diameter | d | 25 mm |
| Outside diameter | D | 57 mm |
| Width | B | 50 mm |
| Basic dynamic load rating | C | 22.6 kN |
| Basic static load rating | C0 | 36 kN |
| Fatigue load limit | Pu | 5.2 kN |
| Mass | ≈m | 0.565 kg |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 120 °C |
Manufacturer Identity4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 397993 | |
| Brand | INA | |
| Base Type | ZARN2557 | |
| X Life Marking | n.r. |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Needle roller/axial cylindrical roller bearings ZARN, double direction | |
| Short Description | Needle roller/axial cylindrical roller bearing |
Technical Data28 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 25 mm | |
| Outside Diamater (D) | 57 mm | |
| Hight (H) | 50 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 22,600 N | |
| Basic Static Load Rating, Radial (C0R) | 36,000 N | |
| Basic Dynamic Load Rating, Axial (Ca) | 35,500 N | |
| Basic Static Load Rating, Axial (C0A) | 86,000 N | |
| Height Outer Ring Over Wave Washer (H1) | 35 mm | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 1,900 1/min | |
| Tilting Stiffness (Ckl) | 350 Nm/mrad | |
| Minimum Diameter Shaft Shoulder (Da) | 39 mm | |
| Limiting Speed (Ng Oil) | 6,000 1/min | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Fatigue Load Limit, Axial (Cua) | 7,300 N | |
| Maximum Diameter Of Housing Shoulder (Da) | 48 mm | |
| Width, Outer Ring (C) | 20 mm | |
| Minimum Chamfer Dimension (R1 Min) | 0.6 mm | |
| Rip Diameter Shaft Washer (D1) | 47 mm | |
| Width Inner Ring (B) | 10 mm | |
| Rigidity Axial (Cal) | 1,900 N/µm | |
| Required Locknut Force (Required Loc) | 9,745 N | |
| Bearing Friction Torque (Mrl) | 0.55 Nm | |
| Tightening Torque Nut (Ma) | 25 Nm | |
| Minimum Chamfer Dimension (Rmin) | 0.3 mm | |
| Axial Runout (Axial Runout) | 1 µm | |
| Mass Moment Of Inertia (Mm) | 0.989 kg*cm2 | |
| Fatigue Load Limit, Radial (Cur) | 5,200 N |
