SMR128
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR128
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.7 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
12 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
1.2 mm
Ball quantity
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
94 lbf
Radial static load rating
44 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
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:
$ 1.35
/ each
In Stock
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SMR128 Bearing Product Overview & Core Advantages
The SMR128 is a metric single row deep groove ball bearing designed for precision radial load applications requiring compact dimensions and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantages include a high limiting speed of 36,000 rpm and compliance with ABEC1 precision class, making it suitable for applications demanding smooth operation and dimensional accuracy. The open design allows for versatile lubrication options to suit various operating conditions.
SMR128 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| SMR | Manufacturer's series designation for miniature stainless steel bearings |
| 128 | Standard bearing size code denoting 8mm bore, 12mm OD, 2.5mm width |
| Open | No seals or shields, allowing for maximum speed and custom lubrication |
SMR128 Bearing Structural Features & Performance Benefits
- Compact Design & High Precision: With dimensions of 8×12×2.5mm and ABEC1 tolerance class, this bearing provides precise rotational accuracy in space-constrained applications.
- High-Speed Capability: The optimized stainless steel cage and balanced design enable operation at 36,000 rpm limiting speed, ideal for high-speed miniature applications.
- Corrosion Resistance: All components manufactured from stainless steel ensure reliable performance in humid or corrosive environments.
- Radial Load Capacity: Engineered to handle radial dynamic loads up to 94 lbf with stable operation and minimal vibration.
- Versatile Lubrication: The open structure allows selection of specialized lubricants to optimize performance across the -30°C to 110°C temperature range.
SMR128 Bearing Typical Application Areas
- Small Precision Motors: Ideal for spindle support in miniature DC motors and stepper motors
- Medical Devices: Used in surgical handpieces, dental tools, and diagnostic equipment requiring corrosion resistance
- Office Automation: Suitable for scanners, printers, and copiers where compact size and reliability are critical
- Instrumentation: Precision measurement devices, optical encoders, and laboratory equipment
- Robotics: Small joint actuators and miniature automation systems requiring high-speed performance
