Pillow block bearings are essential components in industrial systems. They provide stable support for rotating shafts. These units are common in different industries like agriculture and manufacturing.
This guide provides a detailed look atcojinetes de chumacera. It explains their naming conventions and outlines the most common applications.
Understanding the basics in this article leads to more effective use and a longer service life.

What Is a Pillow Block Bearing?

A pillow block bearing is a mounted bearing assembly. It consists of a housing with an insert bearing inside. The housing is designed to be fixed to a surface using bolts. The bearing insert supports the shaft and allows it to rotate smoothly under load.
The housing holds the bearing in place and protects it. It also helps maintain alignment. Most pillow block bearings allow for easy replacement of the bearing insert when it wears out. This reduces downtime and maintenance costs.
Pillow block bearings are used for both radial and axial loads. They are available in a wide range of sizes and materials to meet specific performance requirements.

Understanding Pillow Block Bearing Nomenclature

Pillow block bearings are identified by part numbers that follow a naming convention. The codes indicate bearing type and other features. Learning how to read this nomenclature helps make sure the correct unit is selected.
1. Bearing Type (Prefix Code)
This part of the code identifies the type of bearing insert used in the assembly.
UC – Set screw locking bearing. The most common type.
UK – Tapered bore bearing. Used with adapter sleeves.
HC – Eccentric locking collar. Used in agricultural equipment.
SB – Smaller bore, lightweight bearings.
SA – Narrow inner ring. Used in lighter applications.
Each type has a different locking mechanism and bore style. The correct choice depends on shaft type and operating conditions.
2. Housing Style (Suffix Code)
This part of the code indicates the housing shape and mountingdiseño.
P – Pillow block housing
F – Flange housing (two-bolt)
FL – Flange housing (three-bolt)
FC – Cartridge housing
T – Take-up housing
For example, in the code UCP205:
UC = bearing type (set screw)
P = pillow block housing
205 = bearing insert size (shaft diameter 25 mm)
3. Shaft Diameter (Numeric Code)
The last digits of the bearing code refer to the shaft diameter. Multiply the last two digits by 5 to get the size in millimeters. For example:
05 = 25 mm
08 = 40 mm
Some part numbers include additional letters to indicate special designs like stainless steel construction or high-temperature grease.

Applications of Pillow Block Bearings

Pillow block bearings are used in a wide range of machines and systems. Their ability to support shafts and resist misalignment makes them suitable for many load-bearing applications.
1. Material Handling and Conveyors
Pillow blocks support the rollers and shafts in conveyor systems. These bearings are used in packaging lines and distribution centers. They help maintain alignment and allow for smooth transport of goods.
2. Agricultural Machinery
Used in sprayers and irrigation systems. Agricultural environments expose bearings to dirt and harsh elements. Pillow blocks used in this field feature seals and coatings to resist contamination.
3. HVAC Equipment
Used in air handling units and fans. These operate continuously for long periods and must remain stable and quiet. Low-maintenance designs with sealed inserts are preferred.
4. Food and Beverage Processing
These applications require corrosion-resistant materials. Pillow block housings made from stainless steel or thermoplastic are common. They can withstand high-pressure washdowns and resist bacterial buildup.
5. Mining and Construction
These are high-load and high-impact environments. Pillow block bearings must handle shock loads and heavy-duty cycles. Split-housing designs are used to simplify maintenance on large shafts.
6. Light Manufacturing and Automation
Used in printing and textile machines. These benefit from compact/low-friction bearings that offer consistent performance with minimal maintenance.

Selecting the Right Pillow Block Bearing

To choose the correct bearing consider the following factors:
Shaft size. The bearing bore must match the shaft diameter
Load type. Know if the application involves radial, axial, or combined loads
Operating environment. Consider exposure to moisture or high temperatures
Mounting conditions. Confirm the surface is flat and strong enough to hold the housing
Lubrication needs. Some units are pre-lubricated. Others need regular greasing
Choosing the wrong bearing leads to early failure. Always verify the technical specifications before purchase.
Pillow block bearings are a practical solution for supporting rotating shafts. They are used across many industries thanks to their ease of installation and ability to operate under various loads and conditions.
Matching the bearing type to the application improves reliability and lowers maintenance costs. Not to mention reduces downtime.
Here atRodamientos NSARwe offer a wide selection of pillow block bearings for industrial use and other cases. Contact our team for support with all your custom bearing needs.