
UCP 320-Pillow Block Ball Bearing Unit
| Compliance with standard |
JIS |
| Purpose specific |
For material handling applications |
| Material, housing |
Cast iron |
| Sealing, bearing |
Seal and flinger on both sides |
| Sealing type, bearing |
Contact, standard |
| Sealing, unit |
Without |
| Coating |
Without |
Dimensions
| d |
100 mm |
Bore diameter |
|---|---|---|
| d1 |
≈135.5 mm |
Shoulder diameter of inner ring |
| A |
107 mm |
Base width |
| A1 |
71 mm |
Top width |
| B |
108 mm |
Width of inner ring |
| B4 |
18 mm |
Distance from locking device side face to thread centre |
| H |
140 mm |
Height of spherical seat centre |
| H1 |
55 mm |
Foot height |
| H2 |
283 mm |
Overall height |
| J |
380.5 mm |
Distance between attachment bolts |
| J |
max.394 mm |
Distance between attachment bolts |
| J |
min.367 mm |
Distance between attachment bolts |
| L |
482 mm |
Overall length |
| N |
36 mm |
Diameter of attachment bolt hole |
| N1 |
49.5 mm |
Length of attachment bolt hole |
| s1 |
66 mm |
Distance from locking device side face to raceway centre |
| RG |
1/8-27 NPT |
Housing thread for the grease fitting |
|---|---|---|
| R1 |
14 mm |
Axial position of the housing thread |
| Rα |
45 ° |
Angular position of the housing thread |
| DN |
6.589 mm |
Diameter of head sphere of grease fitting |
|---|---|---|
| SWN |
11.11 mm |
Hexagonal key size for the grease fitting |
| GN |
1/8-27 NPT |
Thread of grease fitting |
Calculation data
| Basic dynamic load rating | C |
174 kN |
|---|---|---|
| Basic static load rating | C0 |
140 kN |
| Fatigue load limit | Pu |
4.75 kN |
| Limiting speed |
1 700 r/min |
|
|
Limiting speed with shaft tolerance h6 |
Mounting information
| Set screw | G2 |
M16x1.5 |
|---|---|---|
| Hexagonal key size for set screw |
8 mm |
|
| Recommended tightening torque for set screw |
50 N·m |
|
| Recommended diameter for attachment bolts, mm | G |
30 mm |
| Recommended diameter for attachment bolts, inch | G |
1.125 in |
Characteristics of Pillow Block Ball Bearing Units
Pillow block ball bearing units are robust mechanical components designed to support shafts and facilitate smooth rotational movement. At their core, these units consist of a bearing housed within a solid mounting block, which is often made from cast iron or steel. This block has a distinct shape that allows for easy mounting on a flat surface, hence the name "pillow block." The bearing itself is typically a deep groove ball bearing, which provides high radial and moderate axial load-carrying capabilities. The pillow block design includes features like a sealed or shielded bearing to prevent contamination from dirt and moisture, as well as to retain lubrication. The units come with pre-drilled holes for mounting, making installation straightforward. Additionally, many pillow block units feature self-aligning capabilities, which compensate for minor shaft misalignments and reduce the risk of premature bearing failure.
Applications of Pillow Block Ball Bearing Units
Pillow block ball bearing units are versatile components used across a wide range of industrial applications. They are commonly found in manufacturing equipment, such as conveyors, where they support rotating shafts and ensure smooth operation. In agricultural machinery, these units help in the efficient functioning of various farm equipment, from harvesters to irrigation systems. They are also crucial in the automotive industry, where they support components like axle shafts and drive systems. Other notable applications include textile machinery, where they maintain consistent performance under high-speed conditions, and in the mining industry, where they support heavy-duty equipment that operates in harsh environments. Their adaptability and reliability make them indispensable in any setting where rotational movement is essential.
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