These square 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. Ball bearing units can accommodate moderate initial misalignment, but normally do not permit axial displacement.
| 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 |
60 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 75.64 mm
|
Outer diameter of inner ring |
| d2 |
83 mm
|
Outside diameter of locking ring |
| A |
52 mm
|
Overall width |
| A1 |
17 mm
|
Flange width |
| A3 |
3.2 mm
|
Depth of centring recess |
| A5 |
39 mm
|
Standout of end cover |
| B |
42.5 mm
|
Width of inner ring |
| B1 |
51.7 mm
|
Overall bearing width |
| Db1 |
130 mm
|
Top external diameter |
| Db2 |
143 mm
|
Base external diameter |
| Dc |
161.9 mm
|
Diameter of housing centering recess |
| J |
143 mm
|
Distance between attachment bolts |
| L |
175 mm
|
Overall length |
| N |
18 mm
|
Diameter of attachment bolt hole |
| s1 |
30.5 mm
|
Distance from locking device side face to raceway centre |
| T |
64.5 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 |
34.5 mm
|
Axial 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 |
161 mm
|
Distance of dowel pins |
|---|---|---|
| J7 |
49.5 mm
|
Axial offset of dowel pins |
| N4 |
4 mm
|
Recommended diameter for dowel pins |
| Basic dynamic load rating | C |
52.7 kN
|
|---|---|---|
| Basic static load rating | C0 |
36 kN
|
| Fatigue load limit | Pu |
1.53 kN
|
| Limiting speed |
3 400 r/min
|
| Mass bearing unit |
3.75 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 |
16 mm
|
| Recommended diameter for attachment bolts, inch | G |
0.625 in
|
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