MR137zz
MR Series Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
MR137zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
2.01 g
Tolerance class
ABEC1
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
13 mm
Outside diameter tolerance
-0.008mm to 0
Width
4 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
1.2 mm
Ball quantity
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
104 lbf
Radial static load rating
50 lbf
Limiting speed
40 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
300 Series Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.13
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
MR137zz Bearing Product Overview & Core Advantages
The MR137zz is a metric single row deep groove ball bearing designed for high-performance applications requiring reliable operation under radial loads. Engineered with precision components and shielded construction, it offers excellent durability and consistent performance in compact spaces. Its ABEC1 tolerance class ensures dependable rotational accuracy, making it a robust solution for various industrial mechanisms where space and reliability are critical.
MR137zz Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Benefit |
|---|---|---|
| zz | Double-sided metal shields | Provides effective protection against contamination from both sides, extending bearing life. |
| (Implied) | Requires lubrication | Allows for the use of application-specific greases to optimize performance for different operating conditions. |
MR137zz Bearing Structural Features & Performance Benefits
- Deep Groove Raceway & Single Row Design: Optimized for handling significant radial loads efficiently. The geometry provides smooth operation and low running torque.
- Shielded Construction: The double-sided stainless steel shields (zz) retain lubricant and exclude larger particulate contaminants, enhancing operational reliability and reducing maintenance needs.
- Precision Components: Manufactured from chrome steel rings and balls with a stainless steel cage, ensuring high strength, corrosion resistance, and stable operation up to the limiting speed of 40,000 rpm.
- Standard Internal Clearance (MC3): The specified radial internal clearance of 0.002mm to 0.013mm is suitable for a wide range of operating conditions, accommodating thermal expansion for consistent performance.
MR137zz Bearing Typical Application Areas
The MR137zz is ideally suited for compact, high-speed devices and precision instruments, including:
- Small Electric Motors and Gearboxes
- Precision Spindles in Dental Handpieces and Laboratory Equipment
- Computer Cooling Fans
- Office Automation Equipment (Printers, Scanners)
- Radio-Control Models and Drones
- Medical Devices and Small Pumps
