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Our goal:Our bearings, Your solutions!
professional manufacturer and distributor for special materials bearings
Miniature bearings, also known as instrument bearings, are small-diameter ball bearings designed for precise motion and high-speed applications in compact spaces. These bearings are commonly used in equipment that requires high performance and precision, such as micro motors, flow meters, and precision instruments. Our miniature ball bearings are made from high-quality materials and undergo strict quality control to ensure long-lasting, reliable performance in demanding environments.
● Medical Devices: Insulin pump gearboxes, dental handpieces, diagnostic equipment, and robotic surgery systems.
● Micro Motors & Drives: Power tools, household appliances, automation modules, and compact electric drives.
● Flow Meters & Measuring Instruments: Liquid and gas flow meters requiring stable, accurate rotation.
● Optical & Precision Instruments: Microscopes, cameras, and optical positioning systems.
● Aerospace & High-Reliability Systems: Navigation units, sensors, and control mechanisms.
● Open Miniature Bearings: Suitable for clean environments requiring low friction and high speed.
● ZZ (Shielded) Miniature Bearings: Metal shields provide protection while maintaining speed capability.
● 2RS (Sealed) Miniature Bearings: Rubber seals offer enhanced protection against dust and moisture.
● Flanged Miniature Bearings: Integrated flange simplifies axial positioning in compact housings.
● Extended Inner Ring Miniature Bearings: Improved shaft fixation and mounting stability.
Our miniature ball bearings are designed to meet the most demanding performance standards. Below are the key specifications that define their superior performance:
● Precision Grades: Manufactured to meet ISO P0 to P5 standards (or ABEC-1 to ABEC-7), ensuring optimal accuracy and minimal friction for different types of applications. While ABEC standards are commonly used for electric motor applications, ISO P standards are more suitable for a broader range of precision machinery.
● Radial Clearance: Available in C2, CN, and C3 clearance options. These options are crucial for managing temperature fluctuations and ensuring the bearings perform reliably under heavy loads.
● Vibration/Noise Levels: We offer Z1, Z2, and Z3 vibration/noise grades to ensure smooth, quiet operation in critical applications like optical instruments and micro motors.
● Materials & Manufacturing:
◆ We use GCr15 bearing steel (AISI 52100) or 440C/420C stainless steel for excellent wear resistance and corrosion protection.
◆ Ceramic Ball Material: We offer Si3N4 silicon nitride ceramic balls, which are lighter, harder, more durable, and corrosion-resistant, making them ideal for extreme environments.
◆ Heat Treatment: Our bearings are treated with vacuum quenching and low-temperature tempering, optimizing hardness and wear resistance.
◆ Surface Treatments: We offer surface treatments like passivation and nickel plating to improve corrosion resistance and extend bearing life.
● Performance Data: Dynamic Load Ratings (Cr) and Static Load Ratings (Cor) provide engineers with essential design data. For example, the typical dynamic load rating for miniature bearings can range from 0.5 to 50 kN depending on the type and size of the bearing. Maximum Speed (grease/oil lubrication) reference values: for grease lubrication, typical maximum speeds can range from 10,000 RPM to 40,000 RPM, depending on bearing size, type, and application requirements.
| Type | Open | ZZ (Shielded) | 2RS (Sealed) | Flanged | Extended Inner Ring |
|---|---|---|---|---|---|
| Environment | Clean | Mild dust | Harsh | Space-limited | Precise mounting |
| Seal Protection | None | Metal shield | Rubber seal | None | None |
| Main Advantage | High speed | Balanced protection | Long service life | Easy positioning | Enhanced stability |
| Applications | Small motors | Precision instruments | Medical & robotics | Compact devices | Measurement systems |
We support OEM manufacturers, equipment producers, and bearing distributors with stable supply and consistent quality.
● ISO 9001:2015 quality management system
● Precision inspection for roundness, roughness, and rotational performance
● Customization support based on drawings or samples
● Typical lead time: 4–6 weeks depending on order volume and specifications
If you are unsure which miniature bearing category or specification best fits your application, our engineering team can assist with selection and technical evaluation.
Miniature bearings are available in different measurement standards, mounting structures, and load directions. To help you quickly identify the most suitable products, our miniature bearing range is organized into the following categories
Our bearings, Your solutions!
NO.23 JIAHE ROAD XIAMEN CHINA
The fines high quality special bearing for you!
