These oval flanged ball bearing units are compliant with ISO standards. They consist of an insert bearing, with an extended inner ring and SKF ConCentra locking, and are particularly well suited for applications where there are relatively high speeds and moderate loads, and where vibration, low noise, and minimal maintenance are key operational parameters. The bearing is mounted in a cast iron housing, which can be bolted to a machine wall or frame.
| Compliance with standard |
ISO
|
| Purpose specific |
For material handling applications, 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 |
25 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 33.74 mm
|
Outer diameter of inner ring |
| d2 |
41.7 mm
|
Outside diameter of locking ring |
| A |
30 mm
|
Overall width |
| A1 |
12 mm
|
Flange width |
| A3 |
3.2 mm
|
Depth of centring recess |
| A5 |
20.5 mm
|
Width including end cover |
| B |
24 mm
|
Width of inner ring |
| B1 |
33.2 mm
|
Overall bearing width |
| Db1 |
65 mm
|
Top external diameter |
| Db2 |
70 mm
|
Base external diameter |
| Dc |
63.5 mm
|
Diameter of housing centering recess |
| H |
124 mm
|
Overall height |
| J |
99 mm
|
Distance between attachment bolts |
| L |
70 mm
|
Overall length |
| N |
11.5 mm
|
Diameter of attachment bolt hole |
| s1 |
21.2 mm
|
Distance from locking device side face to raceway centre |
| T |
40.2 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 |
1/4-28 UNF
|
Housing thread for grease fitting |
|---|---|---|
| R1 |
20.5 mm
|
Axial position of the housing thread |
| Rα |
45 °
|
Angular position of the housing thread |
| DN |
6.5 mm
|
Diameter of head sphere of grease fitting |
|---|---|---|
| SWN |
7 mm
|
Hexagonal key size for the grease fitting |
| GN |
1/4-28 SAE-LT
|
Thread of grease fitting |
| J6 |
81 mm
|
Distance of dowel pins |
|---|---|---|
| J7 |
12 mm
|
Axial offset of dowel pins |
| N4 |
2 mm
|
Recommended diameter for dowel pins |
| Basic dynamic load rating | C |
14 kN
|
|---|---|---|
| Basic static load rating | C0 |
7.8 kN
|
| Fatigue load limit | Pu |
0.335 kN
|
| Limiting speed |
7 000 r/min
|
| Mass bearing unit |
0.57 kg
|
| Set screw | G2 |
M5
|
|---|---|---|
| Hexagonal key size for set screw |
2.54 mm
|
|
| Recommended tightening torque for set screw |
4.2 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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