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Thin Section Ball Bearings

Thin section ball bearings are specialized rolling-element bearings with a slim profile, making them ideal for applications where space is limited but performance cannot be compromised. These bearings are commonly used in robotics, automation systems, and precision machinery.

Exceptionally Small, Constant Cross-Section

The defining feature of thinsection ball bearings is their remarkably small cross-section, which is the radial distance between the inner and outer rings.

This is significantly smaller compared to standard bearings with the same bore diameter. The key is that this cross-section remains almost the same even as the bore size increases within a specific series.

This consistent, minimal profile-the essence of “thin section bearing” – allows designers predictable space requirements and enables the creation of highly compact and streamlined machinery where space is at a premium.

Versatile Load Capabilities

Despite their slim profile, thin section ball bearings are designed to handle a wide range of load conditions effectively.

They are commonly available in three basic contact designs:

Radial contact (Type C) optimised for primary radial loads;
Angular contact (Type A) ideal for handling combined radial and axial loads;
Four-Point Contact (Type X) capable of supporting radial, axial (in both directions), and moment loads individually or in combination.

Depending on this diversity, you can choose the suitable thin section ball bearing for various operation demands and achieve the best performance.

Enhanced Design Flexibility

The slim, low profile nature of thin section ball bearings gives engineers excellent freedom in equipment design.

A key advantage is the ability to use large-diameter hollow shafts, creating pathways for essential components like electrical wiring, slip rings, optical fibres, or fluid lines directly through the bearing’s center.

Furthermore, their compact form allows for direct integration into housings and structures, often removing the need for additional support components and simplifying the overall assembly.

This flexibility makes thin section ball bearings a powerful solution for innovative and space-efficient designs.

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FREQUENTLY ASKED QUESTIONS

What exactly is meant by the "constant cross-section" in thin section bearings?

It means the radial distance between the inner ring bore and the outer ring outside diameter is small and stays nearly the same for different bore sizes within a given series.

Unlike standard bearings where this section height typically grows with the bore size.

What materials are typically used for thin ball bearings?

Rings and balls are commonly made from high-quality bearing steel (like 52100 / GCr15) for strength and life. Stainless steel (e.g., 440C) is often used for corrosion resistance. Cages might be brass, steel, nylon, or phenolic resin.