Introduction

Spring bush bearings, also known as spring roller bearings, find widespread use in various applications. One of the most typical areas of application is the steel industry. These bearings are employed in various components, including:

1. Rollers in Steel Mills: In rolling mills, spring bush bearings support the rollers that shape and process steel sheets.
2. Continuous Casting Machines: Spring bush bearings are used for supporting the guide rollers and directing rollers in continuous casting machines.

3. Furnace Equipment: Inside furnaces or refining equipment, spring bush bearings are utilized for the rollers that handle hot materials.

   Construction and Components

   The construction of spring bush bearings is relatively straightforward. They consist of three main components:

   1. Inner Ring: The inner ring provides the mounting surface for the bearing.
   2. Rolling Elements: These typically include cylindrical rollers with a retaining cage. The rolling elements facilitate smooth rotation.
   3. Outer Ring: The outer ring encloses the entire assembly and provides stability.

   These basic elements can be assembled to create various types of bearings, depending on specific requirements. Whether the application involves split bearing housings, high-temperature operations, or axial load transmission, spring bush bearings can adapt. They handle impact loads and minor misalignments with ease, making them versatile even when multiple challenges arise simultaneously. Additionally, these bearings exhibit excellent wear resistance.

   

   Elasticity and Tolerance

   One notable feature of spring bush bearings is their inherent elasticity. The slight clearance between the inner and outer rings allows them to maintain functionality even under conditions like bending deformation. This property makes them particularly suitable for continuous casting machines and high-temperature transfer equipment.

   Advantages of Spring Bush Bearings

   1. Robust Design: Spring bush bearings share a similar height profile with needle roller bearings but offer greater durability. They can withstand temperature variations, contamination, and inadequate lubrication.
   2. Tolerance to Deviations: These bearings tolerate deviations and inclinations, making them ideal for challenging environments.

   3. Application Range: Spring bush bearings find applications beyond the steel industry. They are also used in mining, cement, and other heavy-duty sectors.

The pressure roller bearings are mainly used in the continuous furnaces of sintering plants. They are massive bearings ready to be fixed. They are used with heavy loads and where the rotation reverses continuously at low speed.
The outer ring shows three entire borders, one section and one outer surface which is highly resistant to wear.
The inner ring is made of two parts, each one has an entire border expressly developed in order to bear high axial thrusts, in addition to radial loads.
Pressure roller bearings do not need maintenance.
The outer ring and the inner ring are manufactured in GCr18Mo steel.
Hardness 60-2 HRC.
In order to increase the resistance to wear, pressure roller bearings usually undergo bainitic temper treatment up to 250° C, named S2.
The sealing system foresees the presence of Viton O-rings, which are inserted in the proper grooves on the inner ring. The seals allow the bearing to be disassembled, they prevent the entrance of contaminating agents and in the meantime, the leakage of lubricant.