SKF 31311 bearings
31311 single row tapered roller bearing
- Measurement system
- Metric
- Bore diameter
- 55.000 mm
- Outside diameter
- 120.000 mm
- Width
- 31.500 mm
- Width, ourter ring
- 21.000 mm
- Width, inner ring
- 29.000 mm
- Cr
- 149000 N
- C0r
- 137000 N
- Limiting speed
- 5600 r/min
- Net weight
- 1.51 kg
- Number of rows
- 1
- Contact angle deg
- 28.811
- Sealing
- Without
- Cage
- Steel sheet metal
- Bearing material
- Steel
- Rolling material
- Steel
- Tolerance class
- Normal (PN)
- Lubricant in bearing
- None
- Relubrication feature
- Without
In stock
Technical specification for SKF 31311
| Part Number | 31311 | |
|---|---|---|
| Description | Single row tapered roller bearing | |
| Contact angle | 28.811° | |
| Number of rows | 1 | |
| Cage | Sheet metal | |
| Dimension series | 7FB | |
| Dimensions | ||
| d | 55.0 mm | Bore diameter |
| D | 120.0 mm | Outside diameter |
| B | 31.5 mm | Total width |
| d1 | ≈ 88.4 mm | Shoulder diameter inner ring |
| B | 29.0 mm | Width of inner ring |
| C | 21.0 mm | Width of outer ring |
| r1,2 | min. 2.5 mm | Chamfer dimension of inner ring |
| r3,4 | min. 2.0 mm | Chamfer dimension of outer ring |
| a | 37.064 mm | Distance side face to pressure point |
| Abutment Dimensions | ||
| da | max. 68.0 mm | Diameter of shaft abutment |
| db | min. 66.5 mm | Diameter of shaft abutment |
| Da | min. 94.0 mm | Diameter of housing abutment |
| Da | max. 111.0 mm | Diameter of housing abutment |
| Db | min. 113.0 mm | Diameter of housing abutment |
| Ca | min. 4.0 mm | Minimum width of space required in housing on large side face |
| Cb | min. 10.5 mm | Minimum width of space required in housing on small side face |
| ra | max. 2.5 mm | Radius of shaft fillet |
| rb | max. 2.0 mm | Radius of housing fillet |
| Calculation Data | ||
| C | 149.0 kN | Basic dynamic load rating |
| C0 | 137.0 kN | Basic static load rating |
| Pu | 16.6 kN | Fatigue load limit |
| 5600.0 r/min | Limiting speed | |
| 4300.0 r/min | Reference speed | |
| e | 0.83 | Limiting value |
| Y | 0.72 | Calculation factor |
| Y0 | 0.4 | Calculation factor |
SKF 31311, Single row tapered roller bearings are designed to accommodate combined radial and axial loads and provide low friction during operation. The inner ring, with rollers and cage, can be mounted separately from the outer ring. These separable and interchangeable components facilitate mounting, dismounting and maintenance. By mounting one single row tapered roller bearing against another and applying a preload, a rigid bearing application can be achieved.
- Bore diameter: 55.0 mm
- Outside diameter: 120.0 mm
- Width, total: 31.5 mm
- Width, inner ring: 29.0 mm
- Width, outer ring: 21.0 mm
- Basic dynamic load rating: 149.0 kN
- Basic static load rating: 137.0 kN
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