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 and flinger on both sides
|
| Sealing type, bearing |
Contact, standard
|
| Sealing, unit |
Optional end cover
|
| Coating |
Without
|
| d |
28.575 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 39.7 mm
|
Outer diameter of inner ring |
| A |
30 mm
|
Overall width |
| A1 |
9.5 mm
|
Flange width |
| A5 |
22.5 mm
|
Standout of end cover |
| B |
38.1 mm
|
Width of inner ring |
| B4 |
5 mm
|
Distance from locking device side face to thread centre |
| J |
47.8 mm
|
Distance between attachment bolt holes |
| J1 |
31.8 mm
|
Distance between attachment bolt holes |
| H |
136.5 mm
|
Overall height |
| H1 |
52.3 mm
|
Radial position of the spherical seat |
| L |
82.5 mm
|
Overall length |
| L1 |
82.5 mm
|
Flange length |
| N |
10.5 mm
|
Diameter of attachment bolt hole |
| s1 |
22.2 mm
|
Distance from locking device side face to raceway centre |
| T |
40.9 mm
|
Overall unit width |
| RG |
1/4-28 UNF
|
Housing thread for grease fitting |
|---|---|---|
| R1 |
21.2 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 |
|---|---|---|
| GN |
1/4-28 SAE-LT
|
Thread of grease fitting |
| SWN |
7.938 mm
|
Hexagonal key size for the grease fitting |
| Basic dynamic load rating | C |
19.5 kN
|
|---|---|---|
| Basic static load rating | C0 |
11.2 kN
|
| Fatigue load limit | Pu |
0.475 kN
|
| Limiting speed |
6 300 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
| Mass bearing unit |
0.98 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 |
10 mm
|
| Recommended diameter for attachment bolts, inch | G |
0.375 in
|
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