Flanged ball bearing units consisting of an insert bearing mounted in a composite or cast metal 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 ball bearing units compliant with several industrial standards, meeting many requirements regarding bolt patterns and mechanisms for locking onto the shaft.
| Compliance with standard |
North American standard
|
| Purpose specific |
For material handling applications
|
| Material, housing |
Spheroidal cast iron
|
| Sealing, bearing |
Seal on both sides
|
| Sealing type, bearing |
Contact, standard
|
| Sealing, unit |
Without
|
| Coating |
Without
|
| d |
12.7 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 24.2 mm
|
Outer diameter of inner ring |
| d2 |
27.2 mm
|
Outside diameter of locking ring |
| A |
17.4 mm
|
Overall width |
| A1 |
9.5 mm
|
Flange width |
| B |
19.1 mm
|
Width of inner ring |
| B1 |
28.6 mm
|
Overall bearing width |
| B4 |
4.75 mm
|
Distance from locking device side face to thread centre |
| Db1 |
58 mm
|
Top external diameter |
| H |
81 mm
|
Overall height |
| J |
63.5 mm
|
Distance between attachment bolts |
| L |
58 mm
|
Overall length |
| N |
7.11 mm
|
Diameter of attachment bolt hole |
| s1 |
22.1 mm
|
Distance from locking device side face to raceway centre |
| T |
31.2 mm
|
Overall unit width |
| RG |
1/4-28 UNF
|
Housing thread for grease fitting |
|---|---|---|
| R1 |
1.3 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 |
7.938 mm
|
Hexagonal key size for the grease fitting |
| GN |
1/4-28 SAE-LT
|
Thread of grease fitting |
| Basic dynamic load rating | C |
9.56 kN
|
|---|---|---|
| Basic static load rating | C0 |
4.75 kN
|
| Fatigue load limit | Pu |
0.2 kN
|
| Limiting speed |
9 500 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
| Mass bearing unit |
0.22 kg
|
| Set screw | G2 |
1/4-28 UNF
|
|---|---|---|
| Hexagonal key size for set screw |
3.175 mm
|
|
| Recommended tightening torque for set screw |
4 N·m
|
|
| Recommended diameter for attachment bolts, mm | G |
6 mm
|
| Recommended diameter for attachment bolts, inch | G |
0.25 in
|
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