R188 2rs
R Series Miniature Bearings
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Part No.
Part No.
R188 2rs
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
2.32 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
0.25"
Bore diameter tolerance
-0.0003" to 0"
Outside diameter
0.5"
Outside diameter tolerance
-0.0003" to 0"
Width
0.1875"
Width tolerance
-0.005" to 0"
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
0.0787"
Ball quantity
8
Performance
Temperature range
-86 to 230 °F
Radial dynamic load rating
207 lbf
Radial static load rating
80 lbf
Limiting speed
40 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.00008" to 0.0005"
Radial internal clearance
MC3
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Shield material
Nitrile Rubber
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.13
/ each
In Stock
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R188 2rs Bearing Product Overview & Core Advantages
The R188 is a high-precision miniature ball bearing designed for demanding applications requiring compact dimensions and reliable performance. As a single row deep groove ball bearing, it excels at handling radial loads and moderate axial loads in both directions. Manufactured to ABEC1 precision tolerances, it offers excellent running accuracy and smooth operation. Its compact design, featuring a 1/4" bore and 1/2" outer diameter, makes it an ideal solution for space-constrained assemblies where high rotational speeds and consistent performance are critical.
R188 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Element | Technical Significance |
|---|---|
| R | Indicates a metric series miniature bearing with inch dimensions. |
| 188 | Specifies the bearing size series, defining the 0.25" bore, 0.5" OD, and 0.1875" width. |
| 2RS | Denotes contact seals on both sides, providing superior protection against contamination and retention of lubricant. |
R188 2rs Bearing Structural Features & Performance Benefits
- Robust Construction & High Load Capacity: The deep groove raceway and chrome steel construction enable efficient handling of the 207 lbf dynamic load rating and 80 lbf static load rating.
- Enhanced Contamination Protection: The double-sealed (2RS) design with nitrile rubber seals effectively excludes contaminants like dust and moisture, significantly extending bearing service life in harsh environments.
- Optimized High-Speed Performance: The stainless steel cage ensures stable ball guidance and low friction, contributing to a high limiting speed of 40,000 rpm.
- Precision & Smooth Operation: Built to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), this bearing delivers low noise and vibration for smooth, precise rotation.
- Broad Temperature Range: Suitable for operating temperatures from -86°F to 230°F, making it versatile for various industrial conditions.
R188 2rs Bearing Typical Application Areas
This sealed miniature bearing is ideally suited for:
- Small Electric Motors (e.g., drones, RC vehicles, power tools)
- Precision Instrumentation and medical devices
- Office Automation Equipment (printers, scanners, copiers)
- Textile Machinery spindles and guides
- Food Processing Equipment (compliant with ROHS and REACH regulations)
