SMF128
SMF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMF128
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.81 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
Outer Ring Dimensions
Flange outer diameter
13.2 mm
Flange thickness
0.6 mm
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:
$ 1.59
/ each
In Stock
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SMF128 Bearing Product Overview & Core Advantages
The SMF128 is a single row deep groove ball bearing engineered for high-speed operation and radial load applications. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its compact design, with a minimal cross-section, makes it ideal for applications where space is at a premium. This bearing is defined by its ABEC1 precision class and requires lubrication for optimal performance across a wide temperature range.
SMF128 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SMF128 | The base model number, defining the core bearing dimensions (8mm bore, 12mm OD, 2.5mm width). |
| (No Suffix) | Indicates an open (unsealed) bearing design, requiring external lubrication for proper operation. |
SMF128 Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a width of only 2.5 mm and a weight of 0.81 g, this bearing is engineered for miniaturized and weight-sensitive assemblies.
- High-Speed Capability: The stainless steel cage and optimized internal geometry contribute to a high limiting speed of 36,000 rpm.
- Corrosion Resistance: All components, including rings, balls, and cage, are made from stainless steel, ensuring reliable performance in harsh or washdown environments.
- Precision Performance: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), ensuring smooth and consistent operation.
SMF128 Bearing Typical Application Areas
- Small Precision Motors and Spindles
- Medical and Dental Handpieces
- Office Automation Equipment (e.g., printers, scanners)
- Instrumentation and Control Devices
- Miniature Gearboxes and Mechanisms
