Product Introduction

The UCT series, also known as take-up bearing units, features guide slots on both sides of the housing, allowing for axial sliding along the rails of a matching frame. These units are primarily used in the tensioning systems of belt and chain conveyors; by adjusting the position of the bearing housing to alter the shaft center distance, the tension of the belt or chain can be regulated. 

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.

Meanwhile, in the design of such bearings also have some adjustable mind, it's easy to install, the sealing device has a dual structure, it can work in harsh environments.Bearing Housing is generally used casting or stamping molding. 

Structural Features

Block-style housing with precision-machined guide rail mating surfaces on both sides

Spherical inner bore designed to accommodate a spherical outer-ring ball bearing (typically the UC set-screw type)

The block slides axially within a U-shaped frame or guide rail

Usually equipped with an adjustment screw mechanism for precise positioning and locking

Cast iron housing with a grease fitting

Product Features

Axially adjustable: The block slides within the guide rail to adjust the shaft center distance

Designed for tensioning: Specifically engineered for conveyor belt or chain tensioning

Self-aligning: Spherical interface compensates for installation misalignment

Position locking: Secured via bolts or a locking mechanism once adjusted

Easy maintenance: Includes a grease fitting to support re-lubrication

Common Models

Technical Specifications

Shaft Diameter (Metric): 20mm – 100mm+

Shaft Diameter (Imperial): 3/4" – 3-7/16"

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

Locking Method: UC Set-screw (Primary)

Housing Material: Gray Cast Iron (Standard) / Ductile Iron

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

Adjustment Method: Screw adjustment / Bolt locking

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

Commonly matched cast bearing seats include vertical seat (P), narrow vertical seat (PA), high center vertical seat (PH), square seat (F), convex square seat (FS), convex circular seat (FC), diamond seat (FL), annular seat (C), slider seat (T), suspension seat (HA), adjustable diamond seat (FA), and suspension bearing seat (FB);

Typical Applications

Belt conveyor tensioning units, bucket elevators, chain conveyor tensioners, conveyor belt tension adjustment, textile machinery tensioning rollers, packaging machinery, mining conveyor equipment

Selection Tips

Must be used in conjunction with a compatible U-shaped take-up frame

Keep the mating surfaces between the block and guide rail clean; apply grease regularly to prevent binding

For high-tension applications, select the 300 heavy-duty series with a ductile iron housing

Regularly inspect the adjustment screw to prevent loosening, which could cause belt slippage