MTWB achieves breakthrough in miniature bearing manufacturing with world smallest precision ball bearing at 0.6mm inner diameter
HONG KONG – August 4, 2026 – As global demand for ultra-compact, high-performance components surges across medical devices, robotics, aerospace, and precision instrumentation, MTWB (Mighty Way Industrial Limited) has positioned itself at the forefront of the super precision mini bearings revolution. The company, a specialized manufacturer of customized bearing solutions since 2015, has achieved significant technical breakthroughs in miniature and small deep groove ball bearing (DGBB) manufacturing, delivering precision bearing solutions for high-speed, low-noise, and space-constrained applications.
In a milestone that underscores its engineering capabilities, MTWB now offers a full range of ball bearings from 0.6mm inner diameter (ID) to 380mm outer diameter (OD)—with the 0.6mm ID miniature bearing achieving P4 precision class. This development represents what the company describes as “the smallest precision ball bearing that you can find on earth”.
The pursuit of this ultra-miniaturized bearing was originally driven by medical applications, where millimeter-scale components are essential for minimally invasive surgical devices, implantable equipment, and diagnostic instruments. However, MTWB believes this technology has far-reaching implications across multiple industries, including robotics, precision motors, aerospace systems, and industrial automation equipment.
“The engineering challenge of manufacturing bearings at this scale is immense,” notes the MTWB technical team. “Each bearing—no larger than a grain of rice—must undergo precision grinding, heat treatment, and assembly processes with tolerances measured in microns. Our success in producing the world smallest precision ball bearing demonstrates our commitment to pushing the boundaries of what’s possible in bearing miniaturization.”
Beyond miniaturization, MTWB has also made significant strides in noise reduction technology. Recognizing that bearings are critical components of electric motors and precision equipment, the company has implemented targeted quality control measures during the grinding process of inner ring raceways to minimize vibration and noise.
MTWB’s high-precision machines and advanced techniques refine every aspect of the bearing—from raceways to balls—ensuring they exceed industry standards. The company conducts 100% inspection on sealing effectiveness before every bearing leaves the factory, reducing the possibility of dust and debris contamination that could compromise long-term performance.
Noise detection is classified into Z1, Z2, Z3, and Z4 levels, while vibration detection levels range from V1 to V4, allowing customers to select the appropriate grade for their specific application requirements. Motor bearings, in particular, have stricter vibration requirements, and MTWB’s rigorous testing and evaluation procedures guarantee that every batch meets criteria for low noise and high efficiency.
| Parameter | MTWB Approach |
|---|---|
| Noise | Z1–Z4 classification |
| Vibration | V1–V4 classification |
| Raceway | Precision grinding |
| Sealing | 100% inspection |
| Application | Motors and precision equipment |
| Specification | Capability |
|---|---|
| Minimum Bore Diameter | 0.6 mm |
| Precision Class | Up to P4 |
| Materials | GCr15 / G95Cr18 / 300 Series Stainless Steel |
| Noise Grades | Z1–Z4 |
| Vibration Grades | V1–V4 |
| Customization | Prototype to Mass Production |
| Applications | Medical / Robotics / Aerospace / Automation |
MTWB super precision mini bearings are manufactured using only the finest materials, including G95Cr18 and GCr15 bearing steels, plus corrosion-resistant 300-series stainless steel. These top-grade materials ensure strength, durability, and whisper-quiet operation, ready to perform flawlessly over extended service life.
The company customization capabilities set it apart in the global bearing market. MTWB provides full engineering support—from prototype development all the way to high-volume production. Every single bearing undergoes rigorous quality inspection before shipment, ensuring it precisely meets customer technical specifications.
Notable customization achievements include optimized internal dimension design for Bosch’s 6001 bearing, featuring special raceway curvature that improved lubrication efficiency by 30% and controlled rotational accuracy within ±0.5μm. The optimized lubrication efficiency reportedly reduced the CVT system’s energy consumption by 8%. Similarly, ZF’s steering system adopted a triple-lip seal structure combined with special grease formulations developed by MTWB.
MTWB has established itself as a trusted supplier to over 100 OEM customers worldwide. The company OEM customer base spans a wide range of industries, including automation, robotics, medical, aviation, automotive, material handling, agricultural machinery, and precision engineering. Its product portfolio covers miniature bearings, track roller bearings, precision bearings, standard bearings, customized bearings, as well as LSB and bearing parts or assemblies.
The company operates through two core product offerings: “China Premium Bearing” and “MTWB Customized Bearing,” providing one-stop bearing solutions with what it describes as the best price-performance ratio, unparalleled by any international brand.
The global miniature ball bearings market reflects the growing importance of super precision mini bearings across industries. According to industry reports, the miniature ball bearings market was valued at approximately USD 2.0 billion in 2025 and is projected to reach USD 3.4 billion by 2034, exhibiting a compound annual growth rate (CAGR) of 5.77%. Other projections suggest the market could reach USD 3.06 billion by 2032, with a CAGR of 7.28%.
This growth is driven by increasing demand for miniaturized components in medical devices, consumer electronics, robotics, aerospace, and the rapidly expanding AI data center infrastructure. As equipment becomes smaller, faster, and more precise, the demand for super precision mini bearings continues to accelerate.
Ultra-small bearing manufacturing
P4 precision capability
Customized internal geometry
Low-noise and low-vibration control
Material customization
Lubrication customization
Prototype development
OEM mass production
Global technical support
MTWB provides customized miniature and precision bearing solutions for medical devices, robotics, aerospace systems, precision motors and industrial automation. Contact our engineering team to discuss your bearing dimensions, precision class, material, lubrication and application requirements.
Request a Customized Bearing Solution now!
MTWB (Mighty Way Industrial Limited), headquartered in Hong Kong with manufacturing facilities in Zhejiang Province, China, has been committed to delivering precision-engineered bearings with comprehensive technical support since 2015. The company offers high-precision class P6 or above bearings, with customers able to select their preferred vibration and noise levels to achieve optimal cost advantage.
With advanced production equipment, a complete range of testing instruments, and a strong technical team, MTWB ensures product reliability that meets the standards of leading international OEMs. Whether for new project launches or as a reliable alternative to established international brands, MTWB continues to demonstrate that precision knows no limits—even at the smallest scales.
For media inquiries, please contact:
Mighty Way Industrial Limited (MTWB)
Email: sales@mtwbearing.com
Website: www.mtwb-customized-bearing.com
Address: Room 13-15, 19/F, Nan Fung Centre, 264-298 Castle Peak Road, Tsuen Wan, N.T., Hong Kong
