P2B 108-WF
Pillow block bearing unit with composite or cast metal housingPillow (plummer) block bearing units consisting of an insert bearing mounted in a composite or cast metal housing that can be bolted to a support surface. In addition to being part of a unit, some pillow block housings for insert bearings are available as separate components. The SKF assortment includes units that are compliant with several industrial standards and meet many requirements.
- Ready to mount
- Lubricated and sealed bearings
- Quick locking on the shaft
- Large variety of housing shapes, housing materials, and locking methods
- Concentric locking options for high speeds and low vibration
Description
| Compliance with standard | North American standard |
| Purpose specific | For material handling applications |
| Material, housing | Cast iron |
| Sealing, bearing | Seal and flinger on both sides |
| Sealing type, bearing | Contact, standard |
| Sealing, unit | Optional end cover |
| Coating | Without |
Dimensions
| d | 38.1 mm | Bore diameter |
|---|---|---|
| d1 | ≈ 51.8 mm | Shoulder diameter of inner ring |
| d2 | 56.5 mm | Outside diameter of locking ring |
| A | 48.8 mm | Base width |
| A1 | 29 mm | Top width |
| A5 | 23.5 mm | Standout of end cover |
| B | 42.8 mm | Width of inner ring |
| B1 | 56.3 mm | Overall bearing width |
| B4 | 6.75 mm | Distance from locking device side face to thread centre |
| H | 54 mm | Height of spherical seat centre |
| H1 | 20.64 mm | Foot height |
| H2 | 104 mm | Overall height |
| J | 137.32 mm | Distance between attachment bolts |
| J | max. 145.26 mm | Distance between attachment bolts |
| J | min. 129.38 mm | Distance between attachment bolts |
| L | 184.15 mm | Overall length |
| N | 16.67 mm | Diameter of attachment bolt hole |
| N1 | 20.64 mm | Length of attachment bolt hole |
| s1 | 34.9 mm | Distance from locking device side face to raceway centre |
| RG | 1/8-27 NPT | Housing thread for the grease fitting |
|---|---|---|
| R1 | 2.7 mm | Axial position of the housing thread |
| Rα | 45 ° | Angular position of the housing thread |
| DN | 6.579 mm | Diameter of head sphere of grease fitting |
|---|---|---|
| SWN | 11.113 mm | Hexagonal key size for the grease fitting |
| GN | 1/8-27 NPT | Thread of grease fitting |
Calculation data
| Basic dynamic load rating | C | 30.7 kN |
|---|---|---|
| Basic static load rating | C0 | 19 kN |
| Fatigue load limit | Pu | 0.8 kN |
| Limiting speed | 4 800 r/min | |
Limiting speed with shaft tolerance h6 |
Mass
| Mass bearing unit | 2.2 kg |
Mounting information
| Set screw | G2 | 3/8-24 UNF |
|---|---|---|
| Hexagonal key size for set screw | 4.763 mm | |
| Recommended tightening torque for set screw | 16.5 N·m | |
| Recommended diameter for attachment bolts, mm | G | 12 mm |
| Recommended diameter for attachment bolts, inch | G | 0.5 in |
