SR133
SR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SR133
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.1 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
0.09375"
Bore diameter tolerance
-0.0003" to 0"
Outside diameter
0.1875"
Outside diameter tolerance
-0.0003" to 0"
Width
0.0625"
Width tolerance
-0.005" to 0"
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
0.0315"
Ball quantity
7
Performance
Temperature range
-86 to 230 °F
Radial dynamic load rating
32 lbf
Radial static load rating
10 lbf
Limiting speed
72 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.00008" to 0.0005"
Radial internal clearance
MC3
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.47
/ each
In Stock
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SR133 Bearing Product Overview & Core Advantages
The SR133 is a precision miniature ball bearing designed for demanding applications requiring compact size and reliable performance. Manufactured entirely from stainless steel (rings, balls, and cage), it offers excellent corrosion resistance. As an open, single-row deep groove ball bearing, it is primarily engineered to handle radial loads efficiently. Its compact dimensions (0.09375" bore x 0.1875" OD) and ABEC1 precision make it an ideal component for high-reliability, space-constrained assemblies.
SR133 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SR | Standard Bearing Series (Inch) |
| 133 | Bore Code (0.09375") |
| Open | No seals or shields, allowing for higher speeds but requiring external lubrication. |
| ABEC1 | Specifies the precision tolerance class for smooth, low-vibration operation. |
| MC3 | Defines the standard radial internal clearance group. |
SR133 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: Provides superior corrosion resistance, making it suitable for harsh environments and ensuring long-term operational integrity.
- Deep Groove Raceway: Optimized for high radial load capacity and moderate axial loads in both directions.
- Stainless Steel Cage: Ensures dimensional stability and reliable performance at the bearing's limiting speed of 72,000 rpm.
- Precision Engineering (ABEC1): Guarantees tight dimensional tolerances and smooth running, which is critical for reducing vibration and noise in high-speed applications.
- Standard Internal Clearance (MC3): Provides an optimal fit for most general applications, accommodating thermal expansion for stable performance across the specified temperature range (-86 to 230 °F).
SR133 Bearing Typical Application Areas
This bearing is ideally suited for compact mechanisms and precision instruments, including:
- Small Precision Motors and stepper motors
- Medical and Dental Hand Tools
- Optical Encoders and scanning devices
- Instrumentation and Control Systems
- RC Models and Drones
- Office automation equipment
