Product Description
Product Description
Pillow block bearing are a form of mounted bearing used to provide load support for a rotating shaft. Selection of the appropriate bearings can be accomplished based on the shaf t size and the radial and thrust load requirements. Pillow block bearings are designed to support a shaft: the mounting surface is on a parallel line with the axis of the shaft. Elongated bolt holes in the base or feet of the unit allow for some adjustment and easy mounting of the pillow block bearing.
Insert ball bearing unit is consisted of a double sealed, single row bearing and 1 of housings(cast iron housing, stamping steel housing, stainless steel housing, engineering plastic housing, nodular cast iron housing, nickel plating housing, zinc alloy housing, etc). They are widely used inagricultural machinery, construction machinery, textile machinery, foodstuff machinery and conveying devices, etc. Including ucp bearing ,ucf bearing, ucfl bearing ,ucpa bearing and so on.
| Bearing Unit No. | Shaftr Dia d (mm) | Dimensions (mm) | Bolt Used (mm) | Bearing No. | Housing No. | Weight (kg) | |||||||||
| h | a | e | b | S2 | S1 | g | w | Bi | n | ||||||
| UCP305 | 25 | 45 | 175 | 132 | 45 | 20 | 17 | 16 | 85 | 38 | 15 | M14 | UCP305 | P 305 | 1.6 |
| UCP306 | 30 | 50 | 180 | 140 | 50 | 20 | 17 | 18 | 95 | 43 | 17 | M14 | UCP306 | P 306 | 2.1 |
| UCP307 | 35 | 56 | 210 | 160 | 56 | 25 | 17 | 20 | 106 | 48 | 19 | M14 | UCP307 | P 307 | 2.8 |
| UCP308 | 40 | 60 | 220 | 170 | 60 | 27 | 17 | 22 | 116 | 52 | 19 | M14 | UCP308 | P 308 | 3.6 |
| UCP309 | 45 | 67 | 245 | 190 | 67 | 30 | 20 | 24 | 129 | 57 | 22 | M16 | UCP309 | P 309 | 4.7 |
| UCP310 | 50 | 75 | 275 | 212 | 75 | 35 | 20 | 27 | 143 | 61 | 22 | M16 | UCP310 | P 310 | 6.4 |
| UCP311 | 55 | 80 | 310 | 236 | 80 | 38 | 20 | 30 | 154 | 66 | 25 | M16 | UCP311 | P 311 | 7.8 |
| UCP312 | 60 | 85 | 330 | 250 | 85 | 38 | 25 | 32 | 165 | 71 | 26 | M20 | UCP312 | P 312 | 9.4 |
| UCP313 | 65 | 90 | 340 | 260 | 90 | 38 | 25 | 35 | 176 | 75 | 30 | M20 | UCP313 | P 313 | 10.3 |
| UCP314 | 70 | 95 | 360 | 280 | 90 | 40 | 27 | 35 | 187 | 78 | 33 | M22 | UCP314 | P 314 | 11.9 |
| UCP315 | 75 | 100 | 380 | 290 | 100 | 40 | 27 | 35 | 198 | 82 | 32 | M22 | UCP315 | P 315 | 14.5 |
| UCP316 | 80 | 106 | 400 | 300 | 110 | 40 | 27 | 40 | 210 | 86 | 34 | M22 | UCP316 | P 316 | 17.1 |
| UCP317 | 85 | 112 | 420 | 320 | 110 | 45 | 33 | 40 | 220 | 96 | 40 | M27 | UCP317 | P 317 | 19.2 |
| UCP318 | 90 | 118 | 430 | 330 | 110 | 45 | 33 | 45 | 235 | 96 | 40 | M27 | UCP318 | P 318 | 21.1 |
| UCP319 | 95 | 125 | 470 | 360 | 120 | 50 | 36 | 45 | 250 | 103 | 41 | M30 | UCP319 | P 319 | 28.2 |
| UCP320 | 100 | 140 | 490 | 380 | 120 | 50 | 36 | 50 | 275 | 108 | 42 | M30 | UCP320 | P 320 | 34.8 |
| UCP322 | 110 | 150 | 520 | 400 | 140 | 55 | 40 | 50 | 296 | 117 | 46 | M33 | UCP322 | P 322 | 43.2 |
| UCP324 | 120 | 160 | 570 | 450 | 140 | 55 | 40 | 50 | 316 | 126 | 51 | M33 | UCP324 | P 324 | 54 |
| UCP326 | 130 | 180 | 600 | 480 | 140 | 55 | 40 | 50 | 355 | 135 | 54 | M33 | UCP326 | P 326 | 72.1 |
| UCP328 | 140 | 200 | 620 | 500 | 140 | 55 | 40 | 60 | 393 | 145 | 59 | ||||
FEATURES:
a.Rational Self-alignment;
b.Large load capacity;
c.Long life service;
d.Efficient sealing;
e.Bearing can be locked on the shaft easily;
f.Easy installation.
g.4 bolt flange assembly bearings
h.High rotation,Low noise,Long service life
i.High loading capability
j.Heavy duty
Packaging & Shipping
Contact information
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| Aligning: | Non-Aligning Bearing |
|---|---|
| Separated: | Separated |
| Feature: | Vacuum, Magnetically, Low Temperature, High Temperature, High Speed |
| Rows Number: | Single |
| Raceway: | Deep Groove Raceway |
| Material: | Bearing Steel |
| Samples: |
US$ 2/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|

How do UCP bearings handle misalignment?
UCP bearings, also known as pillow block bearings, are designed to handle certain degrees of misalignment between the shaft and the bearing housing. Here’s a detailed explanation of how UCP bearings handle misalignment:
1. Self-Aligning Capability: UCP bearings are often designed with self-aligning features that allow them to accommodate misalignment. This means that the bearing has some flexibility to adjust and adapt to slight angular errors or misalignments between the shaft and the housing. The self-aligning capability helps prevent excessive stress and uneven loading on the bearing, which can lead to premature wear or failure.
2. Spherical Outer Rings: Many UCP bearings incorporate spherical outer rings, which can tilt or swivel within the bearing housing. This spherical design allows the bearing to align itself with the misaligned shaft, compensating for angular errors. The spherical outer ring can rotate and pivot to some extent, reducing the axial and radial forces caused by misalignment and ensuring a more uniform distribution of loads on the bearing.
3. Ball-and-Socket Configuration: Some UCP bearings utilize a ball-and-socket configuration, where the inner ring of the bearing has a convex shape that fits into a corresponding concave shape in the housing. This configuration provides additional flexibility and misalignment compensation. The ball-and-socket design allows the bearing to accommodate misalignment in multiple directions, providing improved performance in applications where misalignment is prevalent.
4. Flexible Mounting Options: UCP bearings offer flexible mounting options that facilitate misalignment compensation. The bearing housing typically has multiple holes or slots for attachment to the equipment or structure. This allows for slight adjustments and repositioning of the bearing during installation, helping to correct minor misalignment between the shaft and the housing.
While UCP bearings can handle certain degrees of misalignment, it’s important to note that excessive or prolonged misalignment can still negatively impact bearing performance and lifespan. The self-aligning features of UCP bearings are intended to compensate for minor misalignments that can occur during operation, but they are not a substitute for proper alignment during installation.
Proper installation and alignment of UCP bearings are essential to maximize their misalignment-handling capabilities. It’s recommended to follow the manufacturer’s guidelines for alignment procedures, including checking and adjusting the shaft and housing alignment using appropriate measurement tools. Correct alignment helps minimize stress, reduce friction, and promote even load distribution, contributing to improved bearing performance and longevity.
If significant misalignment is anticipated in an application, it may be necessary to consider specialized bearing designs, such as spherical roller bearings or self-aligning ball bearings, which are specifically engineered to handle higher degrees of misalignment.

What are the signs of a failing UCP bearing?
A failing UCP bearing, also known as a pillow block bearing, can exhibit various signs and symptoms that indicate a potential problem. It’s important to recognize these signs early on to avoid further damage to the bearing and the machinery it supports. Here’s a detailed explanation of the common signs of a failing UCP bearing:
- Abnormal Noise: Unusual noises, such as grinding, scraping, clicking, or rumbling sounds, coming from the UCP bearing or the machinery it is installed in can indicate bearing failure. These noises may occur during operation or when the machinery is under load. Pay attention to any new or persistent noises that are not typical for the normal operation of the machinery.
- Excessive Vibration: A failing UCP bearing can cause increased vibration in the machinery. This vibration may be felt through the equipment or detected visually by observing excessive movement or shaking. Excessive vibration can lead to reduced performance, increased wear on other components, and potential safety hazards.
- Increased Temperature: If the UCP bearing is running at a higher temperature than usual, it can be a sign of bearing failure. Excessive heat can indicate increased friction, inadequate lubrication, or other issues with the bearing. Use caution when assessing the temperature and avoid touching hot surfaces directly.
- Reduced Performance: A failing UCP bearing can result in reduced performance of the machinery it supports. This can manifest as decreased efficiency, diminished output, or difficulty in achieving desired speeds or loads. The bearing’s inability to support the required operational demands can lead to performance issues in the machinery.
- Uneven or Excessive Wear: Inspect the UCP bearing for signs of wear or damage. Look for uneven wear patterns, pitting, scoring, or discoloration on the bearing surfaces. Excessive wear can indicate inadequate lubrication, contamination, misalignment, or other problems that can lead to bearing failure.
- Leakage or Contamination: If there is evidence of grease or lubricant leakage around the UCP bearing housing or seals, it may indicate a failing bearing. Additionally, the presence of contaminants, such as dirt, dust, or water, in or around the bearing can be a sign of compromised sealing or damage to the bearing’s protective barriers.
- Looseness or Excessive Play: A failing UCP bearing may exhibit looseness or excessive play when manually checking for movement. Excessive axial or radial play can indicate wear, misalignment, or internal damage within the bearing. This can result in decreased stability and compromised performance of the machinery.
If you observe any of these signs in your UCP bearing or the machinery it is installed in, it’s important to address the issue promptly. Continuing to operate with a failing UCP bearing can lead to further damage, increased downtime, and potential safety risks. It’s recommended to consult with a qualified technician, maintenance professional, or the bearing manufacturer’s technical support team for proper assessment, diagnosis, and replacement of the failing UCP bearing.
Remember that the signs of a failing UCP bearing may vary depending on the specific application, operating conditions, and other factors. Regular inspection, maintenance, and monitoring of the UCP bearings can help identify potential issues early on and prevent costly failures.

How to install a UCP bearing?
Installing a UCP bearing, also known as a pillow block bearing, requires careful attention to ensure proper alignment and secure attachment. Here’s a detailed explanation of the steps involved in installing a UCP bearing:
- Gather the necessary tools: Before starting the installation process, gather the tools you’ll need, including a wrench or socket set, a torque wrench (if applicable), a hammer or mallet, and any additional tools specified by the bearing manufacturer.
- Prepare the mounting surface: Ensure the mounting surface is clean, flat, and free of any debris or contaminants. If necessary, use a cleaning agent and a cloth to remove dirt or grease from the surface. This will provide a stable foundation for the UCP bearing.
- Inspect the bearing and housing: Before installation, inspect the UCP bearing and the housing for any damage or defects. Check for smooth rotation of the bearing and ensure the housing is free from cracks or deformations. If any issues are found, replace the bearing or housing before proceeding with the installation.
- Apply lubrication: Depending on the bearing type and manufacturer’s recommendations, apply a suitable lubricant to the bearing’s inner race or rolling elements. This will help reduce friction and ensure smooth operation.
- Position the bearing: Place the UCP bearing into the housing, ensuring it is properly aligned. The bearing should fit snugly into the housing, with the mounting holes aligned. Take care not to damage the bearing or housing during this step.
- Secure the bearing: Once the bearing is properly positioned, use the provided fasteners (typically bolts or set screws) to secure the bearing to the mounting surface. Tighten the fasteners gradually and evenly, following the manufacturer’s recommended torque specifications. Avoid over-tightening, as it can damage the bearing or cause excessive friction.
- Check alignment: After securing the UCP bearing, check its alignment with the connected shaft or other components. Ensure that the bearing is aligned properly to prevent excessive loads or misalignment issues. Make any necessary adjustments to achieve proper alignment.
- Verify smooth rotation: Rotate the connected shaft or components to verify that the UCP bearing allows smooth and unhindered motion. Ensure there are no abnormal noises, sticking, or binding. If any issues are detected, recheck the installation or consult the bearing manufacturer for guidance.
- Final checks: Once the UCP bearing is installed, perform a final inspection to ensure everything is secure and in the correct position. Double-check the tightness of the fasteners and verify that there is no excessive play or movement in the bearing assembly.
It’s important to note that the above steps provide a general guideline for installing UCP bearings. The specific installation process may vary depending on the bearing manufacturer’s instructions and any unique requirements of your application. Always refer to the manufacturer’s documentation and guidelines for the most accurate and detailed installation instructions.
In summary, installing a UCP bearing involves preparing the mounting surface, inspecting the bearing and housing, applying lubrication, positioning and securing the bearing, checking alignment, verifying smooth rotation, and conducting final checks to ensure a proper installation.


editor by CX 2024-05-02