SR188
SR 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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SR188 Bearing Product Overview & Core Advantages
The SR188 is a single row deep groove ball bearing designed for precision and reliability in demanding applications. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. This bearing is engineered to primarily support radial loads and is characterized by its compact inch dimensions (0.25" bore, 0.5" OD), making it ideal for applications where space is limited. Its ABEC1 precision class ensures consistent performance, while the standard MC3 radial internal clearance provides optimal operation under normal conditions.
SR188 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SR188 | Standard model number for this specific inch-size, single row deep groove ball bearing. |
| Open (Seal Type) | The bearing is supplied without seals or shields, allowing for higher limiting speeds but requiring external lubrication and protection from contaminants. |
| ABEC1 | Specifies the precision tolerance class, ensuring runout and dimensional accuracy suitable for a wide range of general-purpose applications. |
| MC3 | Denotes the radial internal clearance group, which is greater than normal (CN). This is suitable for applications with potential thermal expansion or where interference fits are used. |
SR188 Bearing Structural Features & Performance Benefits
- Robust Stainless Steel Construction: All components, including rings, balls, and the stainless steel cage, are made from corrosion-resistant stainless steel, ensuring long service life in harsh environments and providing a wide temperature range from -86 to 230 °F.
- Optimized Load Capacity: The deep groove raceway and 8 precision balls enable efficient handling of the 186 lbf radial dynamic load rating, making it a reliable choice for sustained operation.
- High-Speed Capability: The open design and precision grinding contribute to a high limiting speed of 36,000 rpm, ideal for demanding rotational applications.
- Precision Engineering: The ABEC1 tolerance class and tight dimensional controls on bore diameter, outside diameter, and width ensure smooth, low-vibration, and accurate running.
SR188 Bearing Typical Application Areas
The SR188 single row ball bearing is widely used in various precision instruments and machinery, including:
- Small Electric Motors and Gearboxes
- Medical and Dental Equipment
- Precision Spindles and Rotary Stages
- Food Processing and Packaging Machinery (benefiting from its stainless steel construction and ROHS/REACH compliance)
- Optical Encoders and Scanning Devices
- Instrumentation and Control Systems
