ZKLF1255-2Z-XL
Axial angular contact ball bearing
Axial angular contact ball bearings ZKLF..-2Z, double direction, for screw mounting, gap seals on both sides
Replaces
ZKLF 1255.2Z, ZKLF1255-2Z
Description
Metric
Imperial
Main Dimensions & Performance Data
| d | 12 mm | Bore diameter |
| 0 mm | Bore diameter upper tolerance | |
| -0.005 mm | Bore diameter lower tolerance | |
| D | 55 mm | Outside diameter |
| 0 mm | Outside diameter upper tolerance | |
| -0.01 mm | Outside diameter lower tolerance | |
| B | 25 mm | Width |
| 0 mm | Width upper tolerance | |
| -0.25 mm | Width lower tolerance | |
| Ca | 18,800 N | Basic dynamic load rating, axial |
| C0a | 25,000 N | Basic static load rating, axial |
| Cua | 1,520 N | Fatigue load limit, axial |
| nG Grease | 12,000 1/min | Limiting speed for grease lubrication |
| nϑ | 7,600 1/min | Thermally safe operating speed |
| MR | 0.08 Nm | Bearing frictional torque |
| ≈m | 0.359 kg | Weight |
Mounting dimensions
| Da max | 33 mm | Maximum diameter of housing |
| da min | 16 mm | Minimum diameter shaft |
| t1 | 0.1 mm | Position tolerance of bore in the housing |
| M6 | Size of fixing screws | |
| na | 3 | Number of holes in adjacent construction |
| ta | 120 ° | Pitch separation angle of holes in adjacent construction |
| M6 | Connection thread for lubrication |
Dimensions
| d1 | 25 mm | Rib diameter inner ring |
| rmin | 0.3 mm | Minimum chamfer dimension |
| r1 min | 0.6 mm | Minimum chamfer dimension |
| J | 42 mm | Pitch circle diameter fixing holes |
| d2 | 6.8 mm | Fixing holes diameter |
| b | 3 mm | Width of extraction slot |
| I | 17 mm | Distance of extraction slot |
| n | 3 | Pitch quantity of fixing holes |
| t | 120 ° | Pitch separation angle of fixing holes |
| a | 60 ° | Contact angle |
Temperature range
| Tmin | -30 °C | Operating temperature min. |
| Tmax | 120 °C | Operating temperature max. |
Additional information
| caL | 375 N/µm | Rigidity axial |
| ckL | 50 Nm/mrad | Tilting rigidity |
| Mm | 0.068 kg*cm2 | Mass moment of inertia |
| 2 µm | Axial runout | |
| ZM12 | Recommended INA precision locknut for radial locking | |
| MA | 8 Nm | Tightening torque for the recommended INA precision locknut |
| 5,307 N | Required locknut force axial |
Your current product variant
| Sealing | 2Z | Minimal gap seals on both sides |
| Tolerance class | Standard |
Characteristics
