MF128zz
MF Series Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
MF128zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.14 g
Tolerance class
ABEC1
Seal type
Shielded
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
3.5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
13.6 mm
Flange thickness
0.8 mm
Ball & Washer Dimensions
Ball diameter
1.2 mm
Ball quantity
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
104 lbf
Radial static load rating
49 lbf
Limiting speed
40 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
Materials
Ring material
Chrome Steel
Ball material
Chrome 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:
$ 1.32
/ each
In Stock
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MF128zz Bearing Product Overview & Core Advantages
The MF128zz is a miniature metric ball bearing engineered for compact, high-precision applications. As a single row deep groove ball bearing, it is primarily designed to handle radial loads efficiently. Its defining features include a shielded design for contaminant protection and a compact cross-section, making it an ideal solution for applications demanding space savings, reliable performance, and high rotational accuracy within its ABEC1 tolerance class.
MF128zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| MF128 | Bearing series and size designation. | Identifies the specific bearing dimensions: 8mm bore, 12mm OD, 3.5mm width. |
| zz | Bearing is shielded on both sides. | The stainless steel shields protect the internal components from dust and other contaminants, enhancing bearing life and reliability. Note: Lubrication is required as this is not a contact seal. |
MF128zz Bearing Structural Features & Performance Benefits
- Robust Construction: Manufactured from chrome steel for rings and balls, and a stainless steel cage, this bearing offers excellent durability and resistance to wear.
- Optimized Load Capacity: The deep groove raceway and complement of 12 precision balls provide a reliable radial dynamic load rating of 104 lbf, suitable for sustained operation under load.
- High-Speed Capability: The lightweight stainless steel cage and optimized internal geometry contribute to a limiting speed of 40,000 rpm, making it a capable high-speed bearing for its size.
- Precision & Stability: Built to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), ensuring smooth and consistent running, which is critical for precision mechanisms.
- Contaminant Protection: The non-contact ZZ shields help retain lubricant and exclude larger particulate contaminants, extending service intervals and improving operational reliability.
MF128zz Bearing Typical Application Areas
This miniature deep groove ball bearing is ideally suited for a wide range of compact and precision-driven applications, including:
- Small Precision Motors (e.g., stepper motors, coreless motors)
- Office Automation Equipment (printers, scanners, copiers)
- Medical Devices and Instrumentation
- Robotics and RC Models
- Computer Cooling Fans
- Optical Encoders and Precision Gearboxes
