628zz
600 Series Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
628zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
18.5 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
24 mm
Outside diameter tolerance
-0.008mm to 0
Width
8 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
637 lbf
Radial static load rating
256 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
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:
$ 1.13
/ each
In Stock
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628zz Bearing Product Overview & Core Advantages
The 628zz is a single row deep groove ball bearing designed for reliable performance in a wide range of industrial applications. As a metric shielded bearing, it excels in handling radial loads and offers a compact, robust solution. Its key advantages include a high limiting speed of 28,000 rpm, consistent operation within a temperature range of -30°C to 110°C, and compliance with RoHS and REACH standards, making it a versatile and dependable choice for engineers seeking a balance of performance and durability.
628zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 628 | Standard bearing series designation, indicating a metric deep groove design with an 8mm bore. | Defines the core dimensions and series, ensuring interchangeability. |
| zz | Denotes shielded construction on both sides. | Protects against contamination from solid particles, enhancing bearing life and reliability in dirty environments. It is not a contact seal, minimizing friction for higher speeds. |
628zz Bearing Structural Features & Performance Benefits
- Deep Groove Raceway & Single Row Design: The fundamental geometry is optimized for efficient radial load support, providing smooth rotation and low running torque.
- Stainless Steel Cage & Shields: The cage, made from stainless steel, ensures stability and durability at high speeds. The 300 series stainless steel shields offer excellent corrosion resistance.
- High-Grade Chrome Steel Components: Both the rings and balls are manufactured from chrome steel, providing high hardness, wear resistance, and a long operational lifespan.
- ABEC1 Precision Class: Manufactured to ABEC1 tolerance class, this bearing offers a standard level of precision suitable for most general-purpose applications requiring consistent performance.
- Optimized Internal Clearance (MC3): The specified C3 radial internal clearance (0.002mm to 0.013mm) is slightly larger than normal, accommodating thermal expansion in applications where operating temperatures may vary.
628zz Bearing Typical Application Areas
The 628zz shielded ball bearing is a versatile component found in numerous devices and systems, including:
- Small Electric Motors: Ideal for use in fans, blowers, and small power tools where high speed and contamination protection are key.
- Office Machinery & Computer Peripherals: Commonly used in printers, scanners, and disk drives.
- Conveyor Idlers & Material Handling Equipment: Provides reliable support in light-duty conveying systems.
- Precision Instruments & Medical Devices: Suitable for applications requiring smooth, low-noise, and low-vibration operation.
- General Industrial Machinery: A go-to bearing for pumps, gearboxes, and other machinery requiring a compact, shielded radial bearing.
