SR188zz
SR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SR188zz
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
2.32 g
Tolerance class
ABEC1
Seal type
Shielded
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
186 lbf
Radial static load rating
72 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.00008" to 0.0005"
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Shield material
300 Series Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.35
/ each
In Stock
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SR188zz Bearing Product Overview & Core Advantages
The SR188zz is a precision miniature ball bearing designed for demanding applications requiring high reliability and consistent performance. As a single row deep groove ball bearing with shielded construction, it excels at handling radial loads efficiently. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. Its compact inch dimensions (0.25" bore, 0.5" OD) and ABEC1 precision make it an ideal choice for high-speed mechanisms and precision instruments where space is limited and dependable operation is critical.
SR188zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SR | S-Type Bearing, indicating a specific inch series design. |
| 188 | Dimension Series Code, defining the bore, outside diameter, and width proportions. |
| zz | Double Shields (one on each side). This suffix denotes the bearing is equipped with non-contact shields on both sides to protect against contaminants while minimizing friction. |
SR188zz Bearing Structural Features & Performance Benefits
- Robust Stainless Steel Construction: All components, including rings, balls, cage, and shields, are made from stainless steel, providing superior corrosion resistance and durability in harsh environments.
- Optimized Deep Groove Raceway: The single row deep groove design is fundamentally efficient for handling radial loads, ensuring smooth rotation and long service life.
- Effective Contamination Protection: The double-sided shields (zz) act as a physical barrier against dust and debris, helping to maintain internal cleanliness and lubrication integrity without significantly increasing rotational torque.
- Precision and High-Speed Capability: Built to ABEC1 tolerance class with a MC3 radial internal clearance, this bearing offers reliable performance and is capable of operating at a limiting speed of 36,000 rpm.
- Compact and Lightweight: With a total weight of just 2.32 grams, it is engineered for applications where minimizing mass and inertia is crucial.
SR188zz Bearing Typical Application Areas
- Precision Medical and Dental Handpieces
- Small DC Motors and Servo Motors
- Office Automation Equipment (e.g., Printers, Scanners)
- Instrumentation and Guidance Systems
- Radio Control Models and Drones
- Small Pumps and Gearboxes
