Micro Deep Groove Ball Bearings are ultra-compact precision components designed for high-speed, low-noise, and low-friction operation in limited installation spaces. They feature deep raceway grooves that enable smooth rotation and support both radial and light axial loads.
Key performance characteristics include:
These bearings are widely used in micro motors, consumer electronics, precision instruments, and compact automation systems, where reliability and space efficiency are critical.
Miniature deep groove ball bearings (metric series, typically with an outer diameter <9mm) are precision bearings with an inner diameter of 1-10mm, an outer diameter of 3-30mm, and a width of 1-10mm. They are suitable for high-speed, low-noise, and low-load applications, such as motors and instruments. Common series include the 68, 69, 60, and R series. The materials are mostly high-carbon chromium bearing steel (GCr15) or stainless steel, and they support ZZ dust covers or RS seals.
The following are typical miniature deep groove ball bearing models and parameters:
| Bearing Model | Inner Diameterd(mm) | Outer DiameterD (mm) | Width B(mm) | Basic Dynamic LoadCr (N) | Basic Static LoadC 0r(N) | Sealed Form |
| 681X | 1.5 | 4 | 1.2 | 110 | 36 | Open/ZZ |
| 682 | 2 | 5 | 1.5 | 170 | 55 | Open/ZZ |
| 692 | 2 | 6 | 2.3 | 280 | 85 | ZZ |
| MR52 | 2 | 5 | 2.5 | 170 | 55 | ZZ |
| 683 | 3 | 7 | 2 | 345 | 110 | ZZ |
| 693 | 3 | 8 | 3 | 550 | 170 | ZZ |
| 603 | 3 | 9 | 3 | 640 | 200 | ZZ |
| 684 | 4 | 9 | 2.5 | 550 | 170 | ZZ |
| 694 | 4 | 11 | 4 | 950 | 305 | ZZ |
| 604 | 4 | 12 | 4 | 1100 | 380 | ZZ |
| 624 | 4 | 13 | 5 | 1250 | 445 | ZZ |
| 685 | 5 | 11 | 3 | 700 | 250 | ZZ |
| MR137 | 7 | 13 | 4 | 540 | 276 | ZZ |
| 608 | 8 | 22 | 7 | 3300 | 1370 | ZZ |
Customization Capabilities
As a professional bearing manufacturer, we provide:
Miniature size customization (ID from sub-millimeter range)
Low-noise grading (Z1, Z2, Z3, Z4)
Special grease solutions for high temperature or low noise
Non-standard design support for OEM/ODM projects
Ultra-Precision Manufacturing
High-grade raceway finishing ensures smooth rotation and minimal friction
Tight dimensional tolerances suitable for high-end applications
Low Noise & Low Vibration
Optimized internal geometry and surface treatment
Ideal for applications requiring silent operation such as electronics and medical devices
High-Speed Performance
Designed for high RPM environments
Reduced heat generation ensures stable long-term operation
Extended Service Life
Premium material selection (e.g., GCr15 / AISI 52100)
Advanced heat treatment for enhanced fatigue resistance
Flexible Material & Design Options
We support customized solutions based on application requirements:
Stainless steel bearings for corrosion resistance
Ceramic hybrid bearings for high-speed and insulation needs
Various sealing options (ZZ, RS) for different environments
Excellent Lubrication Performance
Optimized grease selection for low torque and long life
Suitable for both sealed-for-life and re-lubrication designs
Consumer Electronics
Smartphones, tablets, and wearable devices
Cooling fans and micro motors
Camera modules and gimbal systems
Value: Ultra-compact size ensures seamless integration into high-density electronic designs.
Precision Instruments
Medical devices (dental tools, surgical instruments)
Laboratory equipment
Optical instruments
Value: High rotational accuracy and low vibration support precision-sensitive operations.
Electric Motors & Micro Drives
Small DC motors and brushless motors
Robotics and automation components
Smart home devices
Value: Stable performance at high speeds with reduced energy consumption.
Automotive Electronics
Electric seat systems
HVAC actuators
Electronic control units
Value: Reliable operation under varying temperature and load conditions.
Industrial & Office Equipment
Printers and copiers
Micro gearboxes
Instrumentation systems
Value: Long service life with minimal maintenance requirements.
Why Choose Our Micro Bearings
Stable quality backed by strict inspection standards
Consistent supply for large-volume OEM customers
Competitive pricing for global wholesale partners
Engineering support for new product development
We have found that many people would like to learn about the application technology and selection of Bearing but do not have suitable materials to read. Our team of engineers constantly exports technology on our download page and blog, which you can download for free.
Hi, I am Maxwell, I am an engineer in the field of bearing applications. I majored in mechanical and electromechanical engineering during college. After graduation, I worked for the top three "SKF" bearing companies in the world for ten years , during which I went to dozens of customers in different industries to help them solve problems in bearing applications; later I joined VKUKEN Bearing Manufacturing, and I will share bearing technical knowledge on this website from time to time. If you are a customer Please contact me to help you solve your problem; if you are also a technical expert in bearings, I am very willing to exchange technical knowledge about bearings with you.
