SMR85
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR85
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.25 g
Tolerance class
ABEC1
Seal type
Open
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 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
1 mm
Ball quantity
8
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
53 lbf
Radial static load rating
19 lbf
Limiting speed
47.7 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
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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SMR85 Bearing Product Overview & Core Advantages
The SMR85 is a metric miniature ball bearing engineered for precision applications requiring compact design and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. As a single row deep groove ball bearing, it is primarily designed to handle radial loads efficiently. Its compact dimensions (5mm bore, 8mm OD, 2mm width) and ABEC1 precision class make it an ideal component for high-speed, space-constrained mechanisms demanding consistent operation and long service life.
SMR85 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| SMR85 | Standard model designation for this specific bearing size (5x8x2mm). |
| Open (Seal Type) | The bearing is unsealed (Open), allowing for easy re-lubrication but requiring a clean operating environment. |
| MC3 (Clearance) | Specifies a radial internal clearance group of 0.002mm to 0.013mm, suitable for most general applications. |
SMR85 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: The rings, balls, and cage are made from stainless steel, providing superior corrosion resistance and cleanliness, which is critical for applications in harsh environments or sensitive industries.
- High-Speed Capability: With a limiting speed of 47,700 rpm, this bearing is designed for high-speed operation. The deep groove raceway and stainless steel cage contribute to smooth rotation at elevated velocities.
- Precision Performance: Manufactured to ABEC1 tolerance class with tight dimensional control on the bore, outside diameter, and width, ensuring reliable fit and predictable performance in precision assemblies.
- Radial Load Capacity: The deep groove geometry and 8-ball complement enable efficient handling of radial dynamic and static loads (53 lbf and 19 lbf respectively) for its size.
SMR85 Bearing Typical Application Areas
- Small Precision Motors (e.g., drone motors, small DC motors)
- Medical and Dental Handpieces
- Optical and Precision Instrumentation (e.g., scanners, encoders)
- Office Automation Equipment (e.g., small printers, copiers)
- Radio-Controlled Models and Hobbyist Projects
