MR52ZZ Metric Size Miniature Ball Bearing
Precision Performance for Compact Mechanical Designs
As devices become smaller and more sophisticated, the components inside them must deliver reliable performance within increasingly limited space.
The MR52ZZ miniature ball bearing is developed for precision applications where compact dimensions, smooth rotation, and consistent quality are essential. Featuring a double metal shield design, this metric miniature bearing helps protect internal components from contamination while maintaining low rotational resistance.
From miniature motors and optical instruments to robotics and sensor assemblies, the MR52ZZ is widely used in applications where precision matters more than size.
Designed for Small Components with Big Responsibilities
In many compact devices, bearings are among the few moving parts responsible for maintaining accuracy and operational stability.
Even slight variations in rotational smoothness can affect overall equipment performance.
The MR52ZZ helps address these challenges by combining:
Compact dimensions for space-restricted assemblies
Stable rotational performance
Low running friction
Reliable lubrication retention
Consistent manufacturing tolerances
For engineers designing miniature systems, these characteristics can simplify integration and improve product reliability.
Technical Specifications
| Item | Specification |
|---|---|
| Product Model | MR52ZZ |
| Bearing Type | Metric Miniature Deep Groove Ball Bearing |
| Bore Diameter (d) | 2 mm |
| Outer Diameter (D) | 5 mm |
| Width (B) | 2.5 mm |
| Shield Type | Double Metal Shield (ZZ) |
| Material | Chrome Steel |
| Cage Type | Steel Cage |
| Precision Grade | P0 / P6 / P5 Available |
| Clearance Options | C0 / C3 |
| Lubrication | Factory Greased |
| Operating Temperature | -20°C to +120°C |
Why Miniature Bearing Quality Matters
At larger sizes, minor manufacturing variations may have limited impact.
At miniature scale, however, precision becomes significantly more important.
| Performance Factor | Impact on Equipment |
|---|---|
| Dimensional Accuracy | Assembly consistency |
| Raceway Finish | Rotational smoothness |
| Noise Level | Product quality perception |
| Lubrication Stability | Operating lifespan |
| Vibration Control | Motion accuracy |
| Shield Quality | Contamination protection |
This is why many OEM manufacturers place strict requirements on miniature bearing suppliers.
Typical Applications
Miniature Electric Motors
Small motors often rely on miniature bearings to maintain smooth and efficient operation.
Applications include:
Micro motors
Coreless motors
DC motors
Brushless motors
Robotics and Automation
Compact robotic systems require precise motion control in limited installation spaces.
Common uses include:
Robotic joints
Positioning systems
Actuator assemblies
Sensor mechanisms
Precision Instruments
The MR52ZZ is frequently integrated into:
Optical devices
Measuring instruments
Laboratory equipment
Analytical systems
Consumer and Electronic Products
Miniature bearings are widely used in:
Camera mechanisms
Smart devices
Portable electronics
Precision hobby equipment
Built for Consistency in Production
For equipment manufacturers, consistency is often more important than maximum performance.
Each batch of MR52ZZ bearings undergoes inspection procedures designed to maintain uniformity between production lots.
Inspection Items
| Inspection Process | Purpose |
|---|---|
| Material Verification | Ensure steel quality |
| Dimensional Measurement | Verify tolerances |
| Clearance Testing | Maintain performance consistency |
| Noise Evaluation | Detect assembly variations |
| Vibration Analysis | Improve motion quality |
| Lubrication Inspection | Confirm grease consistency |
These procedures help support stable OEM production programs.
The Challenge of Working at Miniature Scale
Designing compact equipment creates unique engineering problems.
As products become smaller:
·Tolerances become tighter
·Installation space becomes limited
·Heat dissipation becomes more critical
·Mechanical resistance becomes more noticeable
·Component consistency becomes increasingly important
In these situations, oversized or general-purpose bearings are often unsuitable.
The MR52ZZ is specifically developed for applications where miniature dimensions and predictable performance are required simultaneously.
FAQ
What does "ZZ" mean in MR52ZZ?
ZZ indicates that the bearing is equipped with metal shields on both sides. These shields help protect internal components while maintaining low friction characteristics.
Is the MR52ZZ bearing supplied with lubricant?
Yes. Standard MR52ZZ bearings are factory greased and ready for installation.
Can stainless steel versions be supplied?
Yes. Stainless steel alternatives are available for applications requiring enhanced corrosion resistance.
Is this bearing suitable for miniature motors?
Absolutely. The MR52ZZ is widely used in micro motors, brushless motors, and compact drive systems.
What industries commonly use MR52ZZ bearings?
Applications include robotics, instrumentation, medical devices, consumer electronics, automation equipment, and precision motion systems.
Can custom packaging be provided?
Yes. OEM branding, private-label packaging, laser marking, and customized logistics solutions are available.
Are samples available before production orders?
Yes. Sample quantities can be supplied for testing, validation, and design verification.
Products Description
Catalogue
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