SMR93
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR93
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.75 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
3 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
9 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
1.588 mm
Ball quantity
6
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
98 lbf
Radial static load rating
31 lbf
Limiting speed
50.4 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:
$ 1.35
/ each
In Stock
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SMR93 Bearing Product Overview & Core Advantages
The SMR93 is a metric miniature ball bearing designed for high-precision applications requiring compact dimensions and reliable performance. As a single row deep groove ball bearing in an open configuration, it is optimized to primarily carry radial loads. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. Its key advantages include a compact design with a 3mm bore, suitability for high rotational speeds up to 50,400 rpm, and compliance with ABEC1 precision tolerances, making it ideal for applications demanding high reliability and smooth operation in limited spaces.
SMR93 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SMR | Manufacturer series prefix for miniature metric bearings. |
| 93 | Standard size code denoting a 3mm bore, 9mm outside diameter, and 2.5mm width. |
| Open (No Seal) | Indicates the bearing has no integral seals or shields. This allows for higher limiting speeds and facilitates custom lubrication but requires a clean operating environment. |
| ABEC1 | Specifies the tolerance class, defining the precision of dimensional and running accuracy. |
| MC3 Clearance | Defines the radial internal clearance group (0.002mm to 0.013mm), suitable for applications with moderate operational temperatures and fits. |
SMR93 Bearing Structural Features & Performance Benefits
- Deep Groove Raceway & Single Row Design: The fundamental geometry enables efficient handling of radial loads and moderate axial loads in both directions, providing versatile performance in a compact footprint.
- Full Stainless Steel Construction: All components, including rings, balls, and the stainless steel cage, are made from corrosion-resistant stainless steel. This ensures long-term performance and reliability in harsh or wash-down environments and contributes to the bearing's ROHS and REACH compliance.
- High-Speed Capability: The combination of the open design, precision ABEC1 tolerances, and optimized stainless steel cage allows for a very high limiting speed of 50,400 rpm, making it an excellent choice for high-speed applications.
- Precision Engineering: Tight dimensional tolerances on the bore diameter, outside diameter, and width ensure consistent performance, easy installation, and precise shaft alignment.
SMR93 Bearing Typical Application Areas
- Small Precision Motors: Ideal for spindle support in miniature DC motors, stepper motors, and coreless motors.
- Medical and Dental Devices: Used in surgical handpieces, dental drills, and pump mechanisms where compact size, corrosion resistance, and high speed are critical.
- Office Automation Equipment: Suitable for components in printers, scanners, and copiers.
- Instrumentation and Control Systems: Applied in encoders, sensors, and small gearboxes requiring precise and reliable rotation.
- Radio Control Models and Drones: Used in motor and propeller shaft assemblies.
