Thrust Bearings

Verified by Mel Sykes, Industrial Supply Chain Specialist - April 2026

Specification	Details
Types	Single direction (511xx), double direction (522xx), spherical roller thrust (292xx)
Materials	Chrome steel 52100, stainless steel
Standards	ISO 104, ISO 492
Applications	Gearboxes, vertical shafts, crane hooks, extruders

What are Thrust Bearings?

Thrust Bearings are components designed to support axial loads in machines and equipment. They come in various types-single direction, double direction, and spherical roller thrust-to handle different loading scenarios.

Types and Variants

Single Direction (511xx Series)

• Type 51107: Outer diameter: 35 mm; bore diameter: 25 mm.
• Type 51120: Outer diameter: 80 mm; bore diameter: 40 mm.

These bearings are used in applications where axial loads act in one direction only, such as in gearboxes and vertical shafts. Thrust Bearings has a smaller cross-section compared to double-direction types.

Double Direction (522xx Series)

• Type 52213: Outer diameter: 70 mm; bore diameter: 40 mm.
• Type 52228: Outer diameter: 140 mm; bore diameter: 62 mm.

These bearings can handle axial loads in both directions. They're commonly found in crane hooks and extruders where bidirectional loading is expected.

Spherical Roller Thrust (292xx Series)

• Type 29213: Outer diameter: 70 mm; bore diameter: 40 mm.
• Type 29228: Outer diameter: 140 mm; bore diameter: 62 mm.

These bearings are self-aligning and can accommodate misalignment due to their spherical design. They're ideal for applications with significant axial loads and high operating temperatures, such as in industrial machinery.

Materials and Specifications

Thrust Bearings typically use materials like Chrome Steel 52100 and Stainless Steel A2-70. Both types meet the ISO 104 and ISO 492 standards, ensuring quality and performance. Chrome steel is ideal for high-load applications due to its hardness and wear resistance, while stainless steel provides corrosion resistance in harsh environments.

Selection Criteria

When selecting a Thrust Bearing, consider factors like load direction, speed, temperature range, and environmental conditions. For example, if the application involves bidirectional axial loads, opt for double-direction bearings. Single-direction types are suitable for unidirectional loads. Always check the manufacturer's specifications for load ratings, temperatures, and pressures to ensure proper fit and performance.

UK Suppliers

MLC lists verified suppliers from Companies House that meet industry standards and quality requirements. Suppliers like The Bearing Company (TBC) and Precision Bearings Ltd offer a wide range of Thrust Bearings in various materials and sizes. These companies are members of trade bodies such as the CBM, BIAFD, BTMA, and BPMA.

Common Applications

Thrust Bearings find applications in gearboxes, vertical shafts, crane hooks, extruders, and other industrial machinery. For instance, a gearbox manufacturer might use single-direction bearings for unidirectional axial loads, while a crane operator could opt for double-direction or spherical roller thrust bearings to handle bidirectional loads and misalignment.

Thrust Bearings play a critical role in mechanical systems by providing support against axial forces, ensuring smooth operation under varying conditions. Proper selection based on specific application needs ensures optimal performance and longevity.