Product Overview

The UCP series represents the most versatile and widely used standard product line among Pillow block Bearings. These units feature a vertical, rectangular-base housing secured by two bolts to a horizontal mounting surface parallel to the shaft, supporting the rotating shaft from below. They are supplied ready-to-use, with the insert ball bearing already pressed into the cast-iron housing and pre-filled with grease and seals. 

The Pillow block Bearings are essentially a variant of Deep Groove Ball Bearings; they are characterized by a spherical outer diameter surface on the outer ring, allowing them to fit into a corresponding concave spherical seat within the bearing housing to provide self-aligning capability. These bearings are primarily designed to accommodate combined radial and axial loads—with radial loads predominating—and are generally unsuitable for bearing axial loads in isolation.

Pillow Block Bearing is a bearing unit combined roller bearing and housing together. Most of the outer spherical bearings are made outer diameter sphere, installation and imported bearing bore together with a spherical structure forms, versatility and interchangeability.

They can be classified into three types based on the locking method: UC (set screw), UEL (eccentric sleeve), and UK (adapter sleeve).

Structural Features

The housing is cast as a single piece from gray cast iron (HT200) and features a rectangular base with two elongated bolt holes, allowing for minor positional adjustments.

Internally fitted with a UC-type spherical outer ring ball bearing (secured via set screws); UEL (eccentric locking collar) or UK (adapter sleeve) variants are also available.

The spherical outer surface of the bearing mates with the spherical bore of the housing, enabling self-alignment.

Standardly equipped with a grease nipple (M6/M8/M10) on the side of the cast iron housing to facilitate re-lubrication.

Optional end covers (ECY/ECW/ECB series) can be fitted to both sides for enhanced protection.

Product Highlights

High Versatility: Suitable for the vast majority of horizontal shaft support applications.

Easy Installation: Bolt mounting combined with set-screw shaft locking ensures quick installation.

Good Self-aligning Performance: Maximum misalignment angle of 2°–3°, compensating for installation errors and shaft deflection.

Excellent Heat Dissipation: Large contact area between the cast iron base and the mounting surface promotes effective heat dissipation.

Convenient Maintenance: Equipped with a grease nipple for periodic re-greasing.

High Interchangeability: Complies with ISO 3228 standards; interchangeable with equivalent models from other brands.

Common Models

Technical Specifications

Shaft Diameter (Metric): 12mm – 140mm

Shaft Diameter (Imperial): 1/2" – 4"

Load Series: 200 (Light Duty) / 300 (Heavy Duty)

Locking Method: UC (Set Screw) / UEL (Eccentric Collar) / UK (Adapter Sleeve)

Housing Material: Gray Cast Iron (Standard) / Ductile Iron / Stainless Steel / Pressed Steel

Seal Type: Double-lip Seal / Triple-lip Seal / Labyrinth Seal

Typical Applications

Belt conveyors, roller conveyors, screw conveyors, industrial fans, blowers, centrifugal pumps, cooling tower fans, textile machinery, agricultural machinery, packaging machinery, woodworking machinery, HVAC systems.

Selection Tips

Long shafts (>500mm) require a fixed-end configuration. Floating end design to prevent axial stress caused by thermal expansion

Upgrade to triple-lip or labyrinth seals for dusty environments

Select 300-series bearings with ductile iron housings for heavy-duty, high-impact applications