SMR85zz
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR85zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.34 g
Tolerance class
ABEC1
Seal type
Shielded
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
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
300 Series 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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SMR85zz Bearing Product Overview & Core Advantages
The SMR85zz is a miniature shielded ball bearing designed for precision applications requiring compact dimensions and reliable performance. As a single row deep groove ball bearing, it excels at handling radial loads while also accommodating moderate axial loads in both directions. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its compact design (5mm bore, 8mm OD) and ABEC1 precision class make it ideal for high-speed, high-reliability applications where space is limited and consistent performance is critical.
SMR85zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SMR85 | Bearing series designation, indicating a metric miniature bearing with a 5mm bore diameter and 8mm outside diameter. |
| zz | Signifies that the bearing is equipped with shields on both sides (2Z). These non-contact shields protect the bearing interior from large contaminants while minimizing friction, contributing to the high limiting speed. |
SMR85zz Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a stainless steel cage, optimized internal geometry, and low-friction shields enables a high limiting speed of 47,700 rpm, making it suitable for demanding high-speed applications.
- Corrosion Resistance & Cleanliness: Manufactured entirely from stainless steel (rings, balls, cage, and shields), this bearing is inherently resistant to rust and corrosion, ideal for harsh environments or applications requiring cleanliness.
- Precision Performance: Built to ABEC1 tolerance class with controlled radial internal clearance (MC3 group), ensuring smooth and quiet operation, reduced vibration, and consistent performance in precision mechanisms.
- Compact & Lightweight Design: With a minimal cross-section (2.5mm width) and a weight of just 0.34 grams, it is engineered for space-constrained and weight-sensitive assemblies without compromising load capacity.
SMR85zz 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 small pump systems where reliability and corrosion resistance are paramount.
- Office Automation Equipment: Critical components in scanners, printers, and copiers for guiding precision shafts and rollers.
- Instrumentation and Robotics: Supports shafts in encoders, sensors, and small robotic joints requiring high-speed and low-friction operation.
- Radio-Controlled Models and Drones: Used in motor and gearbox assemblies for their lightweight and high-speed performance.
