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 air 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
|
| d |
38.1 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 51.8 mm
|
Outer diameter of inner ring |
| d2 |
62 mm
|
Outside diameter of locking ring |
| A |
38.9 mm
|
Overall width |
| A1 |
14.3 mm
|
Flange width |
| A5 |
26 mm
|
Width including end cover |
| B |
33.9 mm
|
Width of inner ring |
| B1 |
43.1 mm
|
Overall bearing width |
| Db1 |
104.8 mm
|
Top external diameter |
| H |
171.5 mm
|
Overall height |
| J |
143.8 mm
|
Distance between attachment bolts |
| L |
104.8 mm
|
Overall length |
| N |
14.3 mm
|
Diameter of attachment bolt hole |
| s1 |
26.2 mm
|
Distance from locking device side face to raceway centre |
| T |
51.6 mm
|
Overall unit width |
|
Values specified for B1 and s1 are approximate and before the set screw is tightened (sleeve and inner ring bore at starting position).
|
||
| RG |
1/8-27 NPT
|
Housing thread for grease fitting |
|---|---|---|
| R1 |
28.1 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 |
| 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
|
| Mass bearing unit |
1.8 kg
|
| Set screw | G2 |
M6
|
|---|---|---|
| Hexagonal key size for set screw |
3.05 mm
|
|
| Recommended tightening torque for set screw |
7.4 N·m
|
|
| Recommended diameter for attachment bolts, mm | G |
12 mm
|
| Recommended diameter for attachment bolts, inch | G |
0.5 in
|
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