Types of Spherical Roller Bearings

1. Cylindrical Bore Spherical Roller Bearings

• Standard straight bore design
• Mounted directly onto cylindrical shafts
• Suitable for general industrial applications

Applications: Gearboxes, pumps, crushers, conveyors

2. Tapered Bore Spherical Roller Bearings

• Tapered inner bore (typically 1:12 or 1:30 taper)
• Mounted using adapter sleeves or withdrawal sleeves
• Allows easier mounting and dismounting

Applications: Heavy-duty machinery, mining equipment, large rotating shafts

3. Sealed Spherical Roller Bearings

• Integrated contact seals on both sides
• Prevent contamination and retain lubrication
• Reduced maintenance requirements

Applications: Agriculture, material handling, dusty environments

4. Open-Type Spherical Roller Bearings

• No seals or shields
• Suitable for oil lubrication systems
• Used in high-load or high-temperature environments

Applications: Steel mills, heavy industrial gear units

5. Vibrating Screen Spherical Roller Bearings

• Special internal clearance and reinforced cage design
• Designed to withstand high vibration and shock loads
• Enhanced durability under dynamic conditions

Applications: Mining, aggregate processing, screening machinery

6. High-Capacity or Heavy-Duty Design

• Optimized internal geometry
• Increased roller size and load capacity
• Improved fatigue resistance

Applications: Wind turbines, paper mills, large industrial drives

Components of a Spherical Roller Bearing and Materials

     

1. Inner Ring Function:

• Mounted on the shaft
• Provides two raceways for the rollers
• Transfers load from the shaft to the rolling elements

Material:

• High carbon chromium bearing steel (GCr15 / AISI 52100)
• Through-hardened or carburized alloy steel for heavy-duty designs
• Precision-ground for high dimensional accuracy and fatigue resistance

2. Outer Ring Function:

• Contains a spherical raceway
• Allows self-alignment of the bearing
• Mounted in the housing

Material:

• High carbon chromium bearing steel (GCr15 / AISI 52100)
• Heat-treated for high load capacity and wear resistance

3. Spherical Rollers Function:

• Barrel-shaped rollers arranged in two rows
• Carry heavy radial loads and axial loads in both directions
• Provide smooth rolling contact

Material:

• High-grade bearing steel (GCr15 / AISI 52100)
• Super-finished surface for reduced friction
• Optional carburized alloy steel for shock-load applications

4. Cage (Retainer) Function:

• Maintains proper spacing and guidance of rollers
• Prevents roller contact and reduces friction

Material Options:

• Pressed steel (standard industrial use)
• Machined brass (heavy-load or high-speed applications)
• Polyamide (PA66 reinforced) for lighter-duty or low-noise environments

5. Seals (For Sealed Types) Function:

• Protect against contamination
• Retain lubricant inside the bearing

Material:

• NBR (nitrile rubber) for general use
• FKM for high-temperature or chemical environments
• Steel-reinforced rubber structure

6. Lubrication Function:

• Reduces friction and heat
• Extends bearing service life

Options:

• Lithium-based grease
• Synthetic grease for high-speed or high-temperature use
• Oil lubrication for heavy industrial systems