SMF85 2rs
SMF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMF85 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.42 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
8 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
Outer Ring Dimensions
Flange outer diameter
9.2 mm
Flange thickness
0.6 mm
Ball & Washer Dimensions
Ball diameter
0.8 mm
Ball quantity
9
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
37 lbf
Radial static load rating
15 lbf
Limiting speed
47.7 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:
$ 1.59
/ each
In Stock
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SMF85 2rs Bearing Product Overview & Core Advantages
The SMF85 2RS is a miniature metric ball bearing engineered for applications demanding compact size, reliable performance, and corrosion resistance. As a single row deep groove ball bearing, it is primarily designed to support radial loads effectively. Its sealed construction (2RS) with nitrile rubber contact seals provides robust protection against contaminants and retains lubrication, making it suitable for a wide operating temperature range. Manufactured entirely from stainless steel, it offers excellent corrosion resistance and is ideal for high-reliability, low-maintenance scenarios where space is at a premium.
SMF85 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SMF85 | The base bearing designation, indicating a specific series with a 5 mm bore, 8 mm outside diameter, and 2.5 mm width. |
| 2RS | Denotes that the bearing is equipped with two nitrile rubber (NBR) contact seals, one on each side. This provides superior protection against dust, moisture, and other contaminants. |
SMF85 2rs Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With dimensions of 5x8x2.5 mm and a weight of only 0.42 g, this bearing is ideal for miniaturized assemblies and portable devices.
- High Corrosion Resistance: The use of stainless steel for the rings, balls, and cage ensures reliable operation in humid or corrosive environments.
- Effective Sealing & Lubrication Retention: The 2RS seals not only keep contaminants out but also effectively retain the required lubricant, extending service life and reducing maintenance needs.
- Precision & Smooth Operation: Built to ABEC1 tolerance class with a MC3 radial internal clearance (0.002mm to 0.013mm), it offers consistent and smooth running performance.
- Robust Dynamic Performance: With a radial dynamic load rating of 37 lbf and a limiting speed of 47,700 rpm, it handles demanding operational conditions in compact spaces.
SMF85 2rs Bearing Typical Application Areas
- Small Precision Motors: Ideal for stepper motors, DC micromotors, and drone motors.
- Medical and Dental Devices: Used in handheld surgical tools, dental handpieces, and diagnostic equipment due to its compact size and corrosion resistance.
- Office Automation Equipment: Suitable for printers, scanners, and small cooling fans.
- Instrumentation and Control Systems: Applied in encoders, sensors, and precision gauges.
- Radio-Controlled Models and Hobbyist Electronics: Perfect for servos, small gearboxes, and other miniature mechanical drives.
