SMF41x
SMF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMF41x
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.12 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
1.2 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
4 mm
Outside diameter tolerance
-0.008mm to 0
Width
1.8 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
4.8 mm
Flange thickness
0.4 mm
Ball & Washer Dimensions
Ball diameter
0.6 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
19 lbf
Radial static load rating
5 lbf
Limiting speed
99 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
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 19.4
/ each
In Stock
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SMF41x Bearing Product Overview & Core Advantages
The **1.2 mm bore miniature ball bearing** is a **metric single row radial ball bearing** designed for ultra-compact precision applications. Featuring an **open design** for customizable lubrication and constructed entirely from **stainless steel**, this bearing offers excellent corrosion resistance. Its primary advantages include a high **limiting speed of 99,000 rpm** and compliance with **ABEC1 precision class**, making it ideal for applications demanding high reliability and smooth operation in confined spaces.
SMF41x Bearing Model Code Explained, Specifications & Naming Convention
| Feature | Specification | Technical Significance |
|---|---|---|
| Seal Type | Open | Allows for application-specific lubrication, optimizing performance for different operating conditions. |
| Tolerance Class | ABEC1 | Defines standard precision for smooth, low-vibration operation. |
| Internal Clearance | MC3 (0.002mm to 0.013mm) | A greater-than-normal radial internal clearance suitable for applications with significant thermal expansion. |
SMF41x Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With dimensions of **1.2mm (bore) x 4mm (OD) x 1.8mm (width)** and a weight of just **0.12g**, this bearing is engineered for miniature assemblies and portable devices where space and weight are critical constraints.
- High-Speed Capability: The **stainless steel cage** and optimized internal geometry contribute to a high **limiting speed of 99,000 rpm**, enabling use in demanding high-rotation applications.
- Corrosion Resistance: All components, including rings, balls, and cage, are made from **stainless steel**, providing excellent protection in humid or corrosive environments.
- Radial Load Capacity: Engineered to handle **radial dynamic loads up to 19 lbf**, making it suitable for supporting shafts and rotors in small mechanisms.
SMF41x Bearing Typical Application Areas
This miniature bearing is ideally suited for:
- Precision Instruments: Optical encoders, gyroscopes, and medical devices.
- Small Motors: Micro-DC motors and stepper motors in drones and robotics.
- Office Automation: Printers, scanners, and small cooling fans.
- Electronic Equipment: High-speed spindles in PCB drilling and miniature gearboxes.
