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K3984-3920
Tapered roller bearing
Tapered roller bearings K-Series, in inch sizes, separable, adjusted or in pairs
Replaces
K3984.3920, K3984.3920.F22
Main Dimensions & Performance Data
| d | 66.675 mm | Bore diameter |
| D | 112.712 mm | Outside diameter |
| B | 30.048 mm | Width, inner ring |
| C | 23.812 mm | Width, outer ring |
| T | 30.162 mm | Width, total |
| Cr | 119,000 N | Basic dynamic load rating, radial |
| C0r | 176,000 N | Basic static load rating, radial |
| Cur | 22,400 N | Fatigue load limit, radial |
| nG | 6,300 1/min | Limiting speed |
| nϑr | 4,300 1/min | Thermal speed rating |
| ≈m | 1.2 kg | Weight |
Mounting dimensions
| da max | 74 mm | Maximum diameter of shaft shoulder |
| db min | 80 mm | Minimum diameter of shaft shoulder |
| Da min | 99 mm | Minimum diameter of housing shoulder |
| Db min | 106 mm | Minimum diameter of housing shoulder |
| Ca min | 4 mm | Minimum axial space |
| Cb min | 6 mm | Minimum axial space |
| ra max | 3.6 mm | Maximum fillet radius of shaft |
| rb max | 3.3 mm | Maximum fillet radius of housing |
Dimensions
| r1, 2 min | 3.6 mm | Minimum chamfer dimension of inner ring back face |
| r3, 4 min | 3.3 mm | Minimum chamfer dimension of outer ring back face |
| a | 26 mm | Distance between the apexes of the pressure cones |
| d1 | 89 mm | Guidance rib diameter of inner ring |
Temperature range
| Tmin | -30 °C | Operating temperature min. |
| Tmax | 120 °C | Operating temperature max. |
Calculation factors
| e | 0.4 | Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y |
| Y | 1.49 | Dynamic axial load factor |
| Y0 | 0.82 | Static axial load factor |
All
English
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