SMR72zz
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR72zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.53 g
Tolerance class
ABEC1
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
2 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
7 mm
Outside diameter tolerance
-0.008mm to 0
Width
3 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
1.2 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
66 lbf
Radial static load rating
21 lbf
Limiting speed
58.5 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:
$ 2.29
/ each
In Stock
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SMR72zz Bearing Product Overview & Core Advantages
The SMR72zz is a miniature deep groove ball bearing engineered for precision applications requiring compact dimensions and reliable performance. Constructed entirely from stainless steel, this single row bearing is designed to handle primarily radial loads and is an ideal solution for devices where space is at a premium. Its shielded (ZZ) design offers effective protection against contamination while maintaining low friction. With an ABEC1 precision class, it provides consistent operation for a wide range of industrial and commercial applications, ensuring high reliability in demanding environments.
SMR72zz Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Advantage |
|---|---|---|
| SMR | Manufacturer's series designation for miniature bearings | Indicates a specialized product line for compact applications |
| 72 | Standardized size code for 2mm bore, 7mm OD, 3mm width | Ensures dimensional compatibility and interchangeability |
| zz | Non-contact metal shields on both sides | Provides effective contamination protection while allowing high-speed operation |
SMR72zz Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With dimensions of just 2mm x 7mm x 3mm and weighing only 0.53g, this bearing is ideal for space-constrained applications where every millimeter counts.
- Stainless Steel Construction: All components, including rings, balls, cage, and shields, are made from stainless steel, providing excellent corrosion resistance and suitability for harsh environments.
- Optimized Load Capacity: The deep groove raceway and 7-ball configuration deliver a radial dynamic load rating of 66 lbf, ensuring reliable performance under substantial radial stresses.
- High-Speed Capability: Featuring a limiting speed of 58,500 rpm, the bearing supports demanding high-rotation applications while maintaining stability.
- Precision Engineering: Manufactured to ABEC1 tolerance standards with controlled radial internal clearance (MC3: 0.002mm to 0.013mm) for smooth, consistent operation.
SMR72zz Bearing Typical Application Areas
- Precision Instruments: Optical encoders, measuring devices, and laboratory equipment
- Small Motors & Drives: Micro motors, stepper motors, and DC brushless motors
- Office Automation: Printers, scanners, and copier mechanisms
- Medical Devices: Surgical tools, dental handpieces, and diagnostic equipment
- Consumer Electronics: Small fans, computer hard drives, and miniature robotics
