MR85 2rs
MR Series Miniature Bearings
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Part No.
Part No.
MR85 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.34 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
Ball & Washer Dimensions
Ball diameter
0.8 mm
Ball quantity
9
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
42 lbf
Radial static load rating
16 lbf
Limiting speed
53 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
Materials
Ring material
Chrome Steel
Ball material
Chrome 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:
$ 1.13
/ each
In Stock
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MR85 2rs Bearing Product Overview & Core Advantages
The MR85 2RS is a sealed single row deep groove ball bearing engineered for compact applications requiring reliable performance. This metric bearing is characterized by its ability to support primarily radial loads and its sealed design, which protects against contamination. Its small cross-section and ABEC1 precision class make it an excellent choice for applications demanding high reliability in a minimal space.
MR85 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| MR85 | The base bearing designation, indicating a specific size series with a 5mm bore and 8mm outside diameter. |
| 2RS | Signifies that the bearing is equipped with two rubber seals (RS), one on each side. This provides effective protection against the ingress of contaminants like dust and moisture. |
MR85 2rs Bearing Structural Features & Performance Benefits
- Robust Sealing: The dual Nitrile rubber seals (2RS) ensure a high degree of contamination exclusion, extending bearing service life and making it suitable for dirty or humid environments.
- High-Grade Materials: Constructed from Chrome Steel rings and balls with a Stainless Steel cage, this combination offers excellent durability and corrosion resistance.
- Optimized Internal Geometry: The deep groove raceway and nine precision balls enable smooth operation and efficient handling of radial dynamic loads up to 42 lbf.
- Compact and Lightweight: With a width of only 2.5mm and a weight of 0.34g, it is ideal for space-constrained and weight-sensitive designs.
- Standard Internal Clearance: The MC3 radial internal clearance (0.002mm to 0.013mm) is suitable for a wide range of general operating conditions.
MR85 2rs Bearing Typical Application Areas
- Small Precision Motors: Ideal for use in miniature DC motors, stepper motors, and fan motors.
- Office Automation Equipment: Commonly found in printers, scanners, and copiers.
- Medical Devices: Suitable for small pumps, handheld surgical tools, and diagnostic equipment.
- Consumer Electronics: Used in small cooling fans, disk drives, and various miniature gearboxes.
- Instrumentation and Control Systems: Provides reliable rotation in encoders, sensors, and small actuators.
