UCPA 208 (Y/UCPA 208)
Short base pillow block ball bearing unit with extended inner ring and set screw locking, Japanese Industrial Standards
Short base pillow (plummer) block ball bearing units consist of an insert bearing mounted in a cast iron housing.
This variant has threaded holes for attachment bolts and is suitable for applications where the direction of rotation is constant or alternating. It has an inner ring extended on both sides and is locked onto the shaft by tightening two set screws on the inner ring, making it easy to mount. The units are compliant with Japanese Industrial Standards (JIS).
- Optimized for applications where space is limited
- Ready to mount
- Lubricated and sealed bearing
- Quick locking onto the shaft
- Extended inner ring for minimized shaft misalignment
Dimensions
| d |
40 mm
|
Bore diameter |
| d1 |
≈52.5 mm
|
Shoulder diameter of inner ring |
| A |
45 mm
|
Base width |
| A1 |
27 mm
|
Top width |
| B |
49.2 mm
|
Width of inner ring |
| B4 |
8 mm
|
Distance from locking device side face to thread centre |
| H |
49.2 mm
|
Height of spherical seat centre |
| H1 |
12.5 mm
|
Foot height |
| H2 |
98 mm
|
Overall height |
| J |
84 mm
|
Distance between attachment bolts |
| L |
116 mm
|
Overall length |
| s1 |
30.2 mm
|
Distance from locking device side face to raceway centre |
THREADED HOLE
| RG |
1/4-28 UNF
|
Housing thread for the grease fitting |
| R1 |
4 mm
|
Axial position of the housing thread |
| Rα |
45 °
|
Angular 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 kN
|
| Fatigue load limit |
Pu |
0.85 kN
|
| Limiting speed |
|
3 750 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
Mounting information
| Thread for attachment bolts |
G |
M14
|
| Thread length |
G1 |
20 mm
|
| Set screw |
G2 |
M8x1
|
| Hexagonal key size for set screw |
|
4.06 mm
|
| Recommended tightening torque for set screw |
|
6.5 N·m
|
