UCF 209-28 (Y/UCF 208-28, UCF 208-112)
Square flanged ball bearing unit with set screw locking, cast iron housing, JIS
These square flanged ball bearing units are compliant with Japanese Industrial Standards (JIS).
They consist of an insert bearing, with an extended inner ring and set screw locking, and are suitable for applications where the direction of rotation is constant or alternating. 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 |
44.45 mm
|
Bore diameter |
| d1 |
≈57.3 mm
|
Outer diameter of inner ring |
| A |
38 mm
|
Width of housing |
| A1 |
16 mm
|
Flange width |
| A5 |
26.5 mm
|
Standout of end cover |
| B |
49.2 mm
|
Width of inner ring |
| B4 |
8 mm
|
Distance from locking device side face to thread centre |
| Db1 |
108 mm
|
Top external diameter |
| J |
105 mm
|
Distance between attachment bolts |
| L |
137 mm
|
Overall length |
| N |
16 mm
|
Diameter of attachment bolt hole |
| s1 |
30.2 mm
|
Distance from locking device side face to raceway centre |
| T |
52.2 mm
|
Overall width |
THREADED HOLE
| RG |
1/4-28 UNF
|
Housing thread for grease fitting |
| R1 |
26 mm
|
Axial position of the housing thread |
GREASE FITTING
| DN |
6.6 mm
|
Diameter of head sphere of grease fitting |
| SWN |
7.94 mm
|
Hexagonal key size for the grease fitting |
| GN |
1/4-28 UNF
|
Thread of grease fitting |
Calculation data
| Basic dynamic load rating |
C |
32.5 kN
|
| Basic static load rating |
C0 |
20.4 kN
|
| Fatigue load limit |
Pu |
0.865 kN
|
| Limiting speed |
|
3 400 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
Mounting information
| Set screw |
G2 |
5/16-24 UNF
|
| Hexagonal key size for set screw |
|
4.02 mm
|
| Recommended tightening torque for set screw |
|
6.5 N·m
|
| Recommended diameter for attachment bolts, mm |
G |
14 mm
|
| Recommended diameter for attachment bolts, inch |
G |
0.5625 in
|
