Products
Miniature Ball Bearings
Product Overview
Miniature Ball Bearings are compact precision bearings designed for small shafts, limited installation space, and high-speed rotating components. They are widely used in small motors, precision instruments, office equipment, medical devices, robotics, home appliances, model mechanisms, and other compact mechanical assemblies where smooth rotation and stable accuracy are required.
ETM supplies miniature bearings in common metric and inch sizes, including open, shielded, sealed, flanged, stainless steel, and miniature thrust configurations. These bearings are selected according to bore diameter, outer diameter, width, speed, load, sealing method, material, lubrication, and noise requirements.
For OEM and maintenance use, miniature bearings help reduce friction, improve motion consistency, and support reliable operation in lightweight and high-precision equipment. Custom options are available for clearance, grease, seal type, material, tolerance grade, and packaging requirements.
Technical Specifications
| Product Types | Miniature deep groove ball bearings, flanged miniature ball bearings, stainless steel miniature bearings, miniature thrust bearings |
| Common Series | MR Series, 60 Series, 62 Series, 68 Series, 69 Series, F / MF flanged series, miniature thrust series |
| Bore Diameter Range | 1mm – 10mm standard miniature range, custom sizes available |
| Outer Diameter Range | 3mm – 30mm depending on series and load requirement |
| Width Range | 1mm – 10mm typical miniature bearing width range |
| Material Options | Chrome steel, stainless steel, ceramic hybrid options available |
| Seal / Shield Options | Open, ZZ metal shields, 2RS rubber seals, low-friction seals |
| Precision Grades | P0, P6, P5; higher precision available for selected sizes |
| Clearance Options | C0, C2, C3 or customized internal clearance |
| Lubrication | Standard grease, low-noise grease, high-speed grease, food-grade grease optional |
| Operating Features | Compact size, low friction, low noise, high speed, reliable rotational stability |
| Applicable Standards | ISO, ABEC equivalent tolerance options, customer-specific OEM requirements |
Key Features
- Compact design – suitable for small shafts, tight spaces, and lightweight mechanical assemblies.
- Low friction operation – supports smooth rotation, reduced heat generation, and stable performance at high speed.
- Multiple miniature bearing types – available in deep groove, flanged, stainless steel, and thrust configurations.
- Precision and low-noise options – suitable for instruments, small motors, office equipment, and precision devices.
- Flexible sealing and lubrication – open, shielded, sealed, low-noise grease, and special grease options available.
- OEM customization support – size, material, clearance, lubrication, tolerance, packaging, and marking can be matched to project needs.
Featured Products
Miniature deep groove ball bearings are the most widely used miniature bearing type, offering compact dimensions, low friction, and stable high-speed rotation for small shafts and precision assemblies. They are commonly selected for small motors, fans, instruments, office equipment, power tools, robotics, and home appliances where smooth running and reliable service life are required in limited installation space.
ETM can supply open, ZZ shielded, and 2RS sealed options with different clearance, grease, precision grade, and packaging requirements. These bearings are suitable for OEM projects that need consistent noise control, dimensional accuracy, and dependable batch supply.
Flanged miniature ball bearings include an integrated flange on the outer ring, helping simplify positioning and prevent axial movement during assembly. This design is useful for guide rollers, pulleys, small gearboxes, office equipment, instruments, compact drive systems, and lightweight mechanisms where the housing structure has limited locating features.
They are available in shielded, sealed, stainless steel, and low-noise versions depending on speed, environment, and installation requirements. ETM supports size selection, lubrication matching, and OEM packaging for projects that need stable fit, clean assembly, and repeatable running performance.
Stainless steel miniature bearings are designed for compact equipment requiring better corrosion resistance, cleanliness, and stable operation in humid or mildly corrosive environments. They are widely used in medical equipment, laboratory instruments, food-related devices, small pumps, precision tools, and electronic assemblies where standard chrome steel may not provide enough environmental resistance.
These bearings can be supplied with open, shielded, or sealed structures and suitable grease options for low noise, clean operation, or improved moisture protection. ETM helps match material, clearance, tolerance, lubrication, and packaging to OEM operating conditions.
Miniature thrust bearings are used in small mechanisms that need to support axial loads in a compact space. They are suitable for small actuators, turntables, adjustment mechanisms, instrument assemblies, office equipment, and compact transmission systems where axial positioning and smooth rotation are more important than heavy radial load capacity.
ETM supplies miniature thrust bearing options for different shaft sizes, load requirements, and lubrication conditions. Selection can be matched to installation space, axial load direction, speed, washer configuration, material, and packaging requirements for stable OEM supply.
Applications
Miniature Ball Bearings are used in compact equipment that requires smooth rotation, low noise, and reliable performance in limited installation space. Typical applications include power tools, office equipment, medical equipment, robotics, and home appliances, where small motors, rollers, shafts, fans, pumps, and precision mechanisms rely on stable bearing performance.
Technical Resources
Whether you are an engineer, procurement manager, or equipment maintenance professional, here you will find in-depth content covering bearing operating principles, technical parameter interpretation, industry application analysis, and selection logic — helping you build a comprehensive understanding of bearing products and make more informed decisions in real-world applications.
FAQs
What are miniature ball bearings used for?
Miniature ball bearings are used in small motors, instruments, office equipment, medical devices, robotics, home appliances, fans, rollers, model mechanisms, and other compact rotating assemblies that require low friction and stable motion.
How do I select the right miniature bearing size?
Selection should be based on shaft diameter, outer diameter, width, load, speed, noise requirement, seal type, material, lubrication, and available installation space. For high-speed or low-noise applications, tolerance grade and grease selection are especially important.
What is the difference between open, ZZ, and 2RS miniature bearings?
Open bearings have the lowest friction and are suitable for clean environments. ZZ shielded bearings provide dust protection with low friction. 2RS sealed bearings offer stronger protection against dust and moisture but may generate slightly higher friction.
When should I choose stainless steel miniature bearings?
Stainless steel miniature bearings are preferred when corrosion resistance, cleanliness, or moisture resistance is important. They are commonly used in medical equipment, food-related devices, laboratory instruments, small pumps, and precision electronic assemblies.
What are flanged miniature bearings used for?
Flanged miniature bearings include an outer ring flange that helps locate the bearing during installation. They are useful for rollers, pulleys, guide wheels, compact housings, and small mechanisms where axial positioning must be simple and stable.
Can miniature bearings be customized for OEM applications?
Yes. ETM can support OEM requirements including size selection, material, seal type, grease, clearance, precision grade, noise level, packaging, and marking according to application and purchasing requirements.
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