SMR63zz
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR63zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.28 g
Tolerance class
ABEC1
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
3 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
6 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
0.8 mm
Ball quantity
8
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
36 lbf
Radial static load rating
12 lbf
Limiting speed
63.9 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
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:
$ 1.35
/ each
In Stock
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SMR63zz Bearing Product Overview & Core Advantages
The SMR63zz is a miniature deep groove ball bearing engineered for precision applications requiring compact design and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. This single row, shielded bearing is designed primarily for radial loads and is characterized by its small bore diameter of 3mm and overall compact dimensions. It is an ideal solution for applications demanding high rotational speeds, low noise, and long service life in constrained spaces.
SMR63zz Bearing Model Code Explained, Specifications & Naming Convention
| Suffix / Prefix | Technical Meaning | Benefit |
|---|---|---|
| SMR | Manufacturer's series prefix for miniature bearings | Indicates a specific product line known for miniature bearing dimensions and precision. |
| 63 | Standardized dimension code (3mm Bore, 6mm OD, 2.5mm Width) | Ensures interchangeability and defines the critical bearing dimensions. |
| zz | Bearing is shielded on both sides | Provides effective protection against contamination from solid particles, enhancing bearing life and reliability. It is pre-lubricated and considered maintenance-free for the life of the application under normal conditions. |
SMR63zz Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a width of only 2.5mm and a weight of just 0.28g, this bearing is perfect for space-critical and weight-sensitive applications.
- Corrosion Resistance: The use of stainless steel for all components (rings, balls, cage, and shield) ensures excellent performance in humid or mildly corrosive environments.
- High-Speed Capability: The limiting speed of 63,900 rpm makes it suitable for high-speed spindles and miniature motors. The pressed steel cage contributes to smooth operation at these velocities.
- Shielded Protection: The non-contact ZZ shields retain grease and exclude large contaminants, offering a robust solution for applications where sealing is required without the added friction of contact seals.
- Precision & Quiet Operation: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3 / 0.002mm to 0.013mm), it ensures consistent, low-vibration, and quiet running.
SMR63zz Bearing Typical Application Areas
- Small Precision Motors: Stepper motors, coreless motors, and miniature DC motors.
- Medical and Dental Devices: Surgical hand tools, dental drills, and small pumps.
- Office Automation Equipment: Printers, scanners, and copiers.
- Instrumentation and Control Systems: Encoders, sensors, and precision gauges.
- Radio Control Models: Drones, miniature cars, and aircraft.
- Computer Peripherals: Small cooling fans and HDD spindle motors.
