MR52
MR Series Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
MR52
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.14 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
2 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
5 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
0.8 mm
Ball quantity
6
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
32 lbf
Radial static load rating
9 lbf
Limiting speed
85 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.91
/ each
In Stock
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MR52 Bearing Product Overview & Core Advantages
The MR52 metric miniature ball bearing is a single row radial ball bearing engineered for compact applications requiring reliable performance. Characterized by its open design and ABEC1 precision class, this bearing is optimized for high-speed operation up to 85,000 rpm. Its construction from chrome steel ensures durability and consistent operation under radial loads. The bearing's minimal weight of 0.14 g and small bearing dimensions (2mm bore, 5mm OD) make it an ideal component for precision mechanisms where space and weight are critical constraints.
MR52 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| MR52 | Standard model designation for this specific metric miniature bearing series. |
| Open (No Seal Code) | Indicates an open bearing without seals or shields, allowing for higher speeds and custom lubrication schemes. |
MR52 Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a stainless steel cage, six precision balls, and an open design enables a limiting speed of 85,000 rpm, making it suitable for high-speed spindles and miniature motors.
- Precision & Stability: Manufactured to ABEC1 tolerance class with a controlled MC3 radial internal clearance (0.002mm to 0.013mm), ensuring smooth and precise rotation with minimal runout.
- Robust Load Capacity: Constructed entirely from chrome steel (rings and balls), providing a dynamic load rating of 32 lbf and a static load rating of 9 lbf for its size, offering reliable performance in demanding radial load applications.
- Application Flexibility: The open seal type allows for a wide operating temperature range (-30°C to 110°C) and the option for specialized lubricants to meet specific environmental or performance requirements.
MR52 Bearing Typical Application Areas
This miniature precision bearing is extensively used in:
- Small Precision Motors and DC Micromotors
- Medical devices such as surgical hand tools and dental drills
- Optical Encoders and Instrumentation
- Office automation equipment including small fans and printer rollers
- Robotics, particularly in miniature joints and gearheads
