S688 2rs
600 Series Stainless Steel Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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S688 2rs Bearing Product Overview & Core Advantages
The S688 2RS is a metric single row deep groove ball bearing designed for high-performance applications requiring reliable operation and long service life. This sealed bearing excels in handling radial loads and is constructed entirely from stainless steel, providing excellent corrosion resistance. Its compact design, with a 5 mm width, makes it ideal for space-constrained assemblies. The inclusion of nitrile rubber seals (2RS) and pre-lubrication ensures protection from contaminants and sustained performance, making it a robust and maintenance-friendly solution for various precision mechanisms.
S688 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Prefix/Suffix | Technical Meaning |
|---|---|
| S | Denotes the bearing ring and ball material as Stainless Steel. |
| 688 | The standard bearing size designation for an 8 mm bore, 16 mm outside diameter, and 5 mm width. |
| 2RS | Indicates the bearing is fitted with contact seals on both sides, made of Nitrile Rubber (Buna-N). This provides superior protection against dust, moisture, and other contaminants. |
S688 2rs Bearing Structural Features & Performance Benefits
- Deep Groove Raceway & Single Row Design: The geometry of the deep groove raceway is optimized for high radial load capacity, while the single-row construction ensures a compact bearing size and low friction.
- Full Complement Stainless Steel Construction: The rings, balls, and cage are all manufactured from stainless steel, granting excellent resistance to rust and corrosion, which is critical for applications in harsh environments or requiring washdown.
- Sealed & Pre-Lubricated for Longevity: The 2RS seals effectively retain lubricant and exclude contaminants, significantly extending the bearing's service life and enabling maintenance-free operation in many applications.
- Precision & Smooth Operation: Built to ABEC1 tolerance class with a controlled radial internal clearance (MC3), this bearing provides reliable and smooth running, contributing to the overall efficiency of the assembly.
S688 2rs Bearing Typical Application Areas
The S688 2RS is ideally suited for a wide range of applications where corrosion resistance, compact size, and reliable sealed performance are paramount. Key industries and equipment include:
- Food Processing & Packaging Machinery (conveyors, dispensers)
- Medical and Dental Equipment (small motors, handheld devices)
- Precision Instruments and Optical Devices
- Small Electric Motors and Fans
- Office Automation Equipment (printers, scanners)
