F4B 212-SRB-SRH
Flanged roller bearing unit with cast housingFlanged roller bearing units consist of an insert bearing mounted in a cast housing that can be bolted to a machine wall or frame. In addition to being part of a unit, some flanged housings for insert bearings are available as separate components. The SKF assortment includes roller bearing units compliant with several industrial standards, meeting many requirements regarding bolt patterns and mechanisms for locking onto on the shaft.
- Ready to mount
- Factory lubricated and sealed
- Long service life
- Minimal maintenance
- Variety of housing shapes, materials and locking methods
Description
| Metric/inch series | Inch |
| Bearing insert | Spherical roller bearing |
| Bearing position | Locating |
| Locking method | Set screws |
| Bearing housing seal type | Radial lip seal |
Dimensions
| da | 69.85 mm | Shaft diameter |
|---|---|---|
| d2 | 111.125 mm | Collar outer diameter |
| A | 73.025 mm | Housing width |
| A1 | 19.05 mm | Flange thickness |
| A2 | 36.513 mm | Machined face to centre line bearing |
| B | 92.075 mm | Inner ring width |
| J | 141.288 mm | Bolt distance or pitch diameter |
| L | 182.563 mm | Housing length |
| N | 20.638 mm | Bolt hole diameter |
| s | 31.75 mm | Inner ring centre to end |
| S | 0.794 mm | Centre line of locating support |
| T | 97.631 mm | Total width |
| GN | 1/8-27 NPT | Thread of grease fitting |
|---|
Calculation data
| Basic dynamic load rating | C | 158 kN |
|---|---|---|
| Basic static load rating | C0 | 208 kN |
| Fatigue load limit | Pu | 23.6 kN |
| Limiting speed | 2 800 r/min | |
| Limiting value | e | 0.22 |
| Calculation factor | Y1 | 3 |
| Calculation factor | Y2 | 4.6 |
| Calculation factor | Y0 | 2.8 |
| Bearing mean diameter | dm | 102.616 mm |
| Axial holding force of the locking mechanism | Pa | 4 kN |
Mass
| Mass bearing unit | 8.53 kg |
Mounting information
| Attachment bolt diameter | G | 0.75 in |
|---|---|---|
| Set screws | 1/2″-20 UNF-3A x 3/4″ | |
| Number of set screws | 2 | |
| Tightening torque for set screws | 70.051 N·m | |
| Grease quantity for relubrication | 8 g |
