Miniature Bearings with Extended Inner Ring

Stainless steel miniature bearings with extended inner ring for shaft sizes from 0.0469 inches to 0.3125 inches

These stainless steel miniature bearings have an inner ring that's wider than the outer ring by 0.0312 inches, providing an extra 0.0156 inches on each side. This design feature facilitates easier mounting, as the wider inner ring removes the necessity for spacers or washers. Moreover, extended inner bearings miniature bearings come with an option of a flange on the outer ring, offering added versatility. For further technical insights, explore the product variants section below.

Flanged miniature bearings with extended inner rings offer distinct advantages compared to their non-flanged counterparts.

The stainless steel extended inner ring bearings are equipped with a stainless steel flange on the outer ring. This flange serves multiple purposes, including facilitating easier location of the bearing within a housing and preventing axial movement in the event of a thrust load. Particularly in applications with significant vibration, maintaining the position of a flanged bearing in the housing becomes easier.

Flanged bearings are also preferred in cases where the housing is made from a different material and may expand more than the bearing outer ring at higher temperatures. In contrast, miniature bearings with extended inner rings provide simplified mounting with the wider inner ring, also eliminating the need for spacers or washers.

Temperature limits and lubrication flexibility

Stainless steel bearings, equipped with a stainless steel retainer and fortified with an appropriate high-temperature lubricant, exhibit resilience in environments with temperatures reaching 250°C constantly, and up to 300°C intermittently.

What sets us apart is our in-house lubrication facility, allowing us to accommodate diverse customer preferences by re-lubricating our stainless steel miniature bearings to match specific requirements. Whether it's optimising for torque, rotational resistance or custom preferences, our bearings are tailored to deliver peak performance across various applications.

However, beyond these thresholds, the load capacity of stainless steel diminishes. Hence, for applications surpassing 300°C, we advise opting for full ceramic bearings because of their superior performance under extreme heat. While stainless steel bearings excel in mildly corrosive settings owing to their corrosion-resistant steel composition, it's essential to note they're affected by seawater, as well as potent acids or alkalis.

These shielded bearings typically come pre-lubricated with grease, but they offer flexibility by also being available with instrument oil for low-torque applications or completely dry for scenarios demanding very low rotational resistance at very low speeds.

Further bearing shield types

When it comes to shielded bearings, various types are available to meet diverse operational requirements. Metal shields provide robust protection against external contaminants while maintaining low friction characteristics. On the other hand, rubber seals offer enhanced sealing capabilities, effectively preventing ingress of moisture, dust and other particles into the bearing assembly.

These seals are particularly suitable for environments prone to contamination, ensuring prolonged bearing life and reliability. Hybrid shield configurations combine the advantages of both metal shields and rubber seals, offering superior protection against contaminants while minimising friction for smooth operation. Whether it's metal shields, rubber seals, or hybrid variants, the choice of bearing shield type depends on factors such as operating conditions, maintenance requirements and performance expectations.

Technical data for optimal performance

To access technical drawings of the extended inner ring bearings along with load and speed data, simply click on INFO in the rows below. The load ratings depicted are for AISI-440C or KS440 stainless steel bearings. It's important to understand that the maximum loads and speeds listed are only for theoretical life calculations.

To ensure a reasonable bearing lifespan, it's advisable to operate bearings well below these maximum load and speed ratings. By doing so, you can optimise bearing performance and bearing life in various applications.

Technical support and expertise

Beyond providing quality products, we offer unparalleled technical support and expertise. Our team of engineers is available to assist customers with product selection, application engineering, and troubleshooting. Get in touch with our team today by emailing sales@smbbearings.com or fill in the contact form.

See product table below for dimensions and technical drawings

See products variants below for flanged options 

Get in touch with our specialist bearing team today by emailing sales@smbbearings.com or fill in the contact form.