SMR72 2rs
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR72 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.53 g
Tolerance class
ABEC1
Seal type
Sealed
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
56.7 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
Nitrile Rubber
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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SMR72 2rs Bearing Product Overview & Core Advantages
The SMR72 2RS is a miniature sealed ball bearing engineered for precision applications requiring compact dimensions and reliable performance. Constructed entirely from stainless steel (rings, balls, and cage) for superior corrosion resistance, this single row bearing is designed to handle primarily radial loads. Its key advantages include a compact 2mm bore design, a durable nitrile rubber seal (2RS) for effective contamination exclusion, and compliance with RoHS and REACH standards, making it ideal for high-reliability, small-scale mechanisms.
SMR72 2rs Bearing Model Code Explained, Specifications & Naming Convention
The SMR72 2RS model designation provides specific technical information:
- SMR72: Denotes the bearing series, indicating a specific miniature bearing design with a 2mm bore and 7mm outside diameter.
- 2RS: Indicates the bearing is equipped with two rubber seals (one on each side), providing excellent protection against dust and moisture ingress.
SMR72 2rs Bearing Structural Features & Performance Benefits
- Compact & Robust Construction: The single-row design with a 2mm bore, 7mm OD, and 3mm width offers a space-saving solution without compromising structural integrity. The all-stainless-steel construction ensures longevity and resistance to corrosion.
- Effective Sealing: The dual nitrile rubber (NBR) seals (2RS) effectively shield the internal components from contaminants, extending bearing life and reducing maintenance needs in challenging environments.
- Precision Performance: Manufactured to ABEC1 tolerance class with an MC3 radial internal clearance (0.002mm to 0.013mm), this bearing ensures smooth and consistent operation, suitable for various precision instruments.
- Operational Limits: With a limiting speed of 56,700 rpm and an operating temperature range of -30°C to 110°C, it is versatile for many high-speed and moderate-temperature applications. Note that lubrication is required for optimal performance.
SMR72 2rs Bearing Typical Application Areas
This bearing is ideally suited for:
- Small Precision Motors (e.g., in drones, RC models)
- Medical Devices and Instrumentation
- Office Automation Equipment (printers, scanners)
- High-Speed Spindles in small-scale machinery
- Various miniature mechanical systems requiring reliable, compact radial support.
