FY 25 LF
Square flanged ball bearing unit with SKF ConCentra locking, cast iron housing, ISO
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.
- Resist high levels of contamination
- Designed for high temperatures and speeds
- Accommodate relatively heavy loads
- Cost-effective
Dimensions
| 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
|
Width of housing |
| A1 |
12 mm
|
Flange width |
| A3 |
3.2 mm
|
Depth of centring recess |
| A5 |
20.5 mm
|
Standout of end cover |
| B |
24 mm
|
Width of inner ring |
| B1 |
33.2 mm
|
Overall bearing width |
| Db1 |
65 mm
|
Top external diameter |
| Db2 |
71 mm
|
Base external diameter |
| Dc |
74.6 mm
|
Diameter of housing centering recess |
| J |
70 mm
|
Distance between attachment bolts |
| L |
95 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 width |
|
Values specified for B1 and s1 are approximate and before the set screw is tightened (sleeve and inner ring bore at starting position).
|
THREADED HOLE
| RG |
1/4-28 UNF
|
Housing thread for grease fitting |
| R1 |
21 mm
|
Axial position of the housing thread |
GREASE FITTING
| 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 |
DOWEL PINS
| J6 |
83 mm
|
Distance of dowel pins |
| J7 |
19 mm
|
Axial offset of dowel pins |
| N4 |
4 mm
|
Recommended diameter for dowel pins |
Calculation data
| 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
|
Mounting information
| 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
|
