MR104
MR Series Miniature Bearings
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Part No.
Part No.
MR104
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.96 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
10 mm
Outside diameter tolerance
-0.008mm to 0
Width
3 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
1.588 mm
Ball quantity
8
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
136 lbf
Radial static load rating
49 lbf
Limiting speed
48 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:
$ 1.13
/ each
In Stock
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MR104 Bearing Product Overview & Core Advantages
The MR104 is a metric single row deep groove ball bearing engineered for high-performance radial load applications. Characterized by its compact design with a 4 mm bore diameter and 10 mm outside diameter, this bearing offers a reliable and precise solution for space-constrained assemblies. Manufactured from chrome steel with an ABEC1 precision class, it ensures consistent operation and durability. Its open design allows for versatile lubrication options, making it suitable for a wide operating temperature range from -30°C to 110°C.
MR104 Bearing Model Code Explained, Specifications & Naming Convention
The model designation MR104 follows a standard industry coding system. A breakdown of its key components is provided below:
| Code Segment | Technical Meaning |
|---|---|
| MR | Prefix denoting a specific series of miniature deep groove ball bearings. |
| 104 | Indicates the specific bore size (4 mm) and dimensional series. |
| Open (Implied) | No seals or shields, allowing for high-speed operation and custom lubrication. |
MR104 Bearing Structural Features & Performance Benefits
- High-Speed Capability: The stainless steel cage and open construction contribute to a high limiting speed of 48,000 rpm, making it an ideal high-speed bearing for demanding applications.
- Radial Load Capacity: Engineered with a dynamic load rating of 136 lbf and a static load rating of 49 lbf, it provides reliable support for significant radial forces.
- Precision & Stability: The ABEC1 tolerance class and controlled MC3 radial internal clearance (0.002mm to 0.013mm) ensure smooth, low-vibration, and precise running, which is critical for sensitive mechanisms.
- Robust Construction: Components made from chrome steel (rings and balls) offer excellent hardness and wear resistance, ensuring a long service life under continuous operation.
MR104 Bearing Typical Application Areas
The MR104 miniature deep groove ball bearing is widely used in compact, high-speed devices across various industries. Key applications include:
- Precision Instruments: Optical encoders, measuring devices, and laboratory equipment.
- Small Motors: Stepper motors, coreless motors, and miniature DC motors.
- Office Automation: Printers, scanners, and copiers.
- Medical Devices: Dental handpieces, small pumps, and diagnostic equipment.
- Robotics: Joints and actuators in small-scale robotic arms and drones.
