AKN RB 28MM/G28

AKN Precision Bearing Ball 28mm G28

Description

This is a high-quality, single precision bearing ball manufactured by AKN, a specialist in rolling elements. The model RB 28MM/G28 is designed for applications requiring high accuracy and durability. Its Grade 28 classification ensures it meets strict international standards for sphericity and dimensional tolerance, making it ideal for use in high-performance bearings, ball screws, valves, and other precision machinery.

Specifications

• Manufacturer: AKN
• Part Number: RB 28MM/G28
• Product Type: Precision Bearing Ball
• Diameter: 28 mm
• Grade: G28
• Material: High-Carbon Chromium Bearing Steel (100Cr6 / AISI 52100 assumed)

Label Info

• Model: RB 28MM/G28
• Quantity: 1 PCS
• Tolerance: +/- 0 UM
• Identifier: G041

Application

Suitable for new bearing assembly, bearing repair, and other industrial applications demanding precise, low-friction rolling elements. Can be used in automotive, aerospace, and general machine manufacturing.

Country of Origin

Germany

CO2 Impact

By purchasing this reused part, you are avoiding the production of a new one, saving an estimated 0.18 kg of CO2. This is comparable to the energy needed to fully charge a smartphone more than 21 times.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?

What does the grade “G28” signify for this bearing ball?

Answer?

G28 is a precision grade according to standards like ISO 3290. It defines the maximum allowable deviations in dimension, form (sphericity), and surface roughness. A G28 ball has very tight tolerances, making it suitable for high-precision industrial bearings and applications where smooth and accurate motion is critical.

Question?

What type of steel is this ball likely made from?

Answer?

While not explicitly stated on the label, precision bearing balls like this are typically made from high-carbon chromium steel, often referred to as 100Cr6 (AISI 52100). This material offers excellent hardness, wear resistance, and load-bearing capacity, which are essential for bearing applications.

Question?

The tolerance is listed as “+/- 0 UM”. Is this realistic?

Answer?

The “+/- 0 UM” on the label refers to the nominal diameter tolerance, meaning it should not deviate from the specified grade’s tolerance band. For a G28 ball of this size, the tolerance on the ball lot diameter is typically within a few micrometers (e.g., +/- 3 to 5 um). The “0” on the label is likely a simplified representation indicating it meets the strict standard for its grade.

Last Update: Friday, March 13, 2026

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