P2B 311-SRB-SGE
Pillow block roller bearing unit, two-bolt, set screw lockingPillow (plummer) block roller bearing units and take-up roller bearing units consist of a spherical or tapered roller bearing mounted in a non-split housing that can be bolted to a support surface. This variant has a spherical roller bearing, a two-bolt base and set screw locking, holding the shaft firmly against the inner ring of the bearing. The units are sealed and lubricated and ready to use. This bearing unit covers a wide range of requirements, in inch dimensions.
- Ready to mount
- Robust
- Factory lubricated and sealed
- Quick mounting
- Long service life
Description
| Metric/inch series | Inch |
| Bearing insert | Spherical roller bearing |
| Bearing position | Non-locating |
| Locking method | Set screws |
| Bearing housing seal type | Heavy-duty seal |
Dimensions
| da | 93.663 mm | Shaft diameter |
|---|---|---|
| d2 | 152.4 mm | Collar outer diameter |
| A | 89.694 mm | Housing foot width |
| B | 116.681 mm | Inner ring width |
| H | 104.775 mm | Height base to center |
| H1 | 63.5 mm | Housing foot height |
| H2 | 213.519 mm | Housing height |
| J | min. 254 mm | Distance between attachment bolts, max. |
| J | max. 311.15 mm | Distance between attachment bolts, min. |
| J | 282.575 mm | Distance of attachment bolts |
| L | 361.95 mm | Housing length |
| N | 28.575 mm | Width foot slot width |
| N1 | 57.15 mm | Length of attachment bolt hole |
| s | 41.275 mm | Centre line unit to side face of inner ring |
| S | 0.794 mm | Centre line of “fixed” bearing |
| T | 121.047 mm | Total width |
| GN | 1/8-27 NPT | Thread of grease fitting |
|---|
Calculation data
| Basic dynamic load rating | C | 311 kN |
|---|---|---|
| Basic static load rating | C0 | 415 kN |
| Fatigue load limit | Pu | 52.9 kN |
| Limiting speed | 700 r/min | |
| Limiting value | e | 0.24 |
| Calculation factor | Y1 | 2.8 |
| Calculation factor | Y2 | 4.2 |
| Calculation factor | Y0 | 2.8 |
| Bearing mean diameter | dm | 139.954 mm |
| Axial holding force of the locking mechanism | Pa | 5.34 kN |
Safe loads
| P90° | 71.2 kN | Safe load at 90° |
|---|---|---|
| P135° | 44.5 kN | Safe load at 135° |
| P180° | 55.2 kN | Safe load at 180° |
Mass
| Mass bearing unit | 20.6 kg |
Mounting information
| Attachment bolt diameter | G | 1 in |
|---|---|---|
| Set screws | 5/8″-18 UNF-2A x 1″ | |
| Number of set screws | 2 | |
| Tightening torque for set screws | 149.705 N·m | |
| Grease quantity for relubrication | 17 g |
