MR74 2rs
MR Series Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
MR74 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.23 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
7 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 mm
Ball quantity
8
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
49 lbf
Radial static load rating
19 lbf
Limiting speed
60 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
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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MR74 2rs Bearing Product Overview & Core Advantages
The MR74 2RS is a miniature deep groove ball bearing designed for applications demanding compact size and reliable performance. Engineered with a single row construction and sealed design, it effectively handles radial loads while offering protection from contamination. Its precision ABEC1 tolerance ensures smooth operation, making it an ideal choice for high-speed, small-scale mechanisms requiring consistent performance and durability.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| MR74 | Standard bearing series designation, indicating a metric, miniature deep groove ball bearing with a 4mm bore, 7mm OD, and 2.5mm width. |
| 2RS | Signifies contact seals on both sides, made of Nitrile Rubber. This provides superior protection against dust and moisture ingress, enhancing bearing life in contaminated environments. |
MR74 2rs Bearing Structural Features & Performance Benefits
- High-Speed Capability: Features a stainless steel cage and optimized internal geometry, supporting a limiting speed of 60,000 rpm for demanding miniature applications.
- Robust Load Handling: Constructed from chrome steel rings and balls, it provides a dynamic load rating of 49 lbf and static load rating of 19 lbf, ensuring reliable performance under radial stresses.
- Precision Internal Clearance: The MC3 radial internal clearance (0.002mm to 0.013mm) is suited for applications requiring precise running accuracy and minimal vibration.
- Maintenance & Contamination Protection: The 2RS rubber seals retain lubricant and effectively exclude contaminants, offering a long service life with minimal maintenance needs.
MR74 2rs Bearing Typical Application Areas
- Small Precision Motors (e.g., drones, RC vehicles)
- Medical Devices & Instrumentation (e.g., surgical hand tools, pumps)
- Office Automation Equipment (e.g., small printers, scanners)
- Consumer Electronics (e.g., miniature fans, small drives)
- Precision Gearboxes & Small Mechanisms
