Product structure:

The R8-2RS is a metric miniature deep groove ball bearing. The model "R8" indicates its core dimensions: 12.7mm bore diameter, 28.575mm outer diameter, and 7.938mm width. "2RS" denotes that it is fitted with rubber contact seals (typically Nitrile Butadiene Rubber, NBR) on both sides. These seals effectively prevent the leakage of internal grease and block the ingress of external dust and contaminants. The bearing is typically made of high-carbon chromium bearing steel (like GCr15), with a cage often made of stamped steel or nylon.

Key performance features:

Its main performance features combine versatility and reliability. The deep groove raceway design enables it to handle radial loads and moderate bidirectional axial loads. The double-sided rubber seals (2RS) provide excellent dust, dirt protection and grease retention, extending maintenance intervals and service life. As a miniature bearing, it features a compact structure, light weight, flexible rotation, and low frictional torque. It also delivers smooth, low-noise operation, making it suitable for medium to high-speed applications.

Main application scenarios:

This bearing is primarily used in light to medium-duty load scenarios where space is limited and reliable rotational support is needed. Typical applications include: serving as shaft support bearings in small AC or DC motors; being embedded in the gearbox or spindle of power tools; used in paper feed rollers or drive shafts of office equipment; acting as the core rotating component in appliance motors like mixers or fans; and used in automation equipment for guide rollers, encoders, or timing belt pulleys.

Technical Specifications & Requirements
The product generally conforms to internationally recognized dimension standards (e.g., ISO 15:2011). Common precision requirements are ABEC-1 (P0 Class) or higher grades (e.g., ABEC-3/P6) to meet different application needs. It is pre-lubricated with high-quality lithium-based or synthetic grease for reliable performance over a wide temperature range. The operating temperature range is typically limited by the seal material, with standard NBR seals suitable for environments from -30°C to +110°C. During installation, it is crucial to ensure the dimensional tolerances and surface finish of the shaft and housing comply with standards to avoid stress concentration or seal damage caused by improper mounting.

Inch Size Miniature Ball Bearings inner diameter 1.984-38.1mm / 英制微型系列轴承内径1.984-38.1mm

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