The 626 Low Noise EMQ Bearing is a precision-engineered miniature deep groove ball bearing (DGBB) designed for applications demanding exceptional rotational accuracy, ultra-low noise operation, and long-term reliability. Manufactured under the MTWB brand, this bearing represents a technical breakthrough in miniature bearing manufacturing, delivering performance that exceeds industry standards for electric motor quality (EMQ) applications.
MTWB has achieved significant technical breakthroughs in miniature and small DGBB manufacturing, providing precision bearing solutions for high-speed, low-noise and space-constrained applications. Leveraging advanced production technology, precision grinding, and strict quality control, MTWB miniature DGBB bearings deliver outstanding rotational accuracy, long service life and reliable performance for medical devices, robotics, precision motors, instruments and industrial automation equipment. With a full manufacturing range spanning from 0.6mm ID to 380mm OD—including the world’s smallest precision ball bearing at 0.6mm ID, P4 precision class—MTWB brings unparalleled expertise to every bearing it produces.
Parameter Value
Model 626 Low Noise EMQ Bearing
Type Deep Groove Ball Bearing (DGBB)
Inner Diameter (ID) 6 mm
Outer Diameter (OD) 19 mm
Width 6 mm
Precision Class ABEC-5 / P6 or higher (EMQ Premium Quality)
Material GCr15 / G95Cr18 bearing steel / 300-series stainless steel options
Cage Nylon / Steel (customizable)
Radial Clearance C0 / C2 / C3 (customizable)
Noise Level Z1–Z4 (customizable)
Vibration Level V1–V4 (customizable)
Lubrication Antirust oil (open) / Lithium-based grease (sealed) / Custom grease available
Sealing Open / 2RS (rubber seal) / ZZ (metal shield)
1. Ultra-Low Noise Performance
Bearings are the key components of electric motors. The key to low noise bearing lies in reducing vibration. MTWB implements targeted quality control during the grinding process of the inner ring raceway, which plays an important role in reducing the noise of EMQ bearings. High-precision machines and top-notch techniques refine every aspect of the bearing—from the raceways to the balls—ensuring they exceed industry standards.
2. 100% Quality Inspection & “Silence Guarantee”
MTWB doesn’t just say bearings are “quiet”—they guarantee it. Every bearing undergoes 100% inspection on the sealing effect before it leaves the factory, reducing the possibility of dust and other debris entering the interior of the bearing ring due to inadequate sealing, which may lead to reduced bearing efficiency over long-term use.
3. Precision Material Selection
Materials matter! MTWB chooses only the finest materials, including G95Cr18 and GCr15 bearing steels, plus corrosion-resistant 300-series stainless steel. These top-grade materials ensure bearings are strong, durable, and whisper-quiet, ready to perform flawlessly for the long haul.
4. Rigorous Noise & Vibration Testing
Noise detection is classified into Z1, Z2, Z3, and Z4 levels, while vibration detection is classified as V1, V2, V3, and V4. Motor bearings have stricter requirements for vibrations, and customers can choose different levels based on specific requirements. Through these rigorous testing and evaluation procedures, MTWB guarantees that every batch of bearings meets the criteria for low noise and high efficiency.
5. Customizable Lubrication Solutions
MTWB bearings are usually lubricated with antirust oil for open bearings or lithium-based grease for closed bearings. Specified grease can also be used according to customer requirements.
6. World-Class Manufacturing Heritage
MTWB manufactures the world’s smallest precision ball bearing (0.6mm ID at P4 class)—a feat originally driven by medical applications. This same precision engineering and quality control extends to every bearing in their portfolio, including the 626 Low Noise EMQ Bearing.
The 626 Low Noise EMQ Bearing is engineered for a wide range of precision applications where silence, accuracy, and reliability are paramount:
Precision Motors & Electric Motors – EMQ-grade performance for brushless DC motors, servo motors, and stepper motors.
Medical Devices – Surgical instruments, dental handpieces, and diagnostic equipment
Robotics – Joint actuators, servo systems, and precision manipulators
Industrial Automation – CNC machinery, pick-and-place equipment, and automated assembly lines
Instruments & Measuring Equipment – High-precision gauges, encoders, and optical instruments
Electronic Cooling Fans – High-speed, low-noise fan applications
3D Printers & Performance Equipment – Where smooth rotation and long service life are essential
Power Hand Tools – Electric drills, grinders, and cutting tools (see differentiation below)
The MTWB advantage: While standard power hand tool bearings are built for durability in high-load, low-precision environments, the 626 Low Noise EMQ Bearing is engineered for precision, silence, and reliability in applications where vibration and noise cannot be tolerated. It is the bearing of choice for electric motors, medical devices, and precision instruments—not just another commodity bearing.
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What Makes the 626 Low Noise EMQ Bearing Unique?
1. MTWB Technical Breakthrough Heritage
MTWB has achieved significant technical breakthroughs in miniature and small DGBB manufacturing.
This is not a standard bearing—it is the product of advanced production technology, precision grinding, and strict quality control.
2. The “Silence Guarantee”
MTWB does not just say bearings are “quiet”—they guarantee it.
Through 100% inspection, rigorous noise and vibration testing (Z1–Z4 and V1–V4 levels), and premium material selection, every bearing meets strict low-noise criteria.
3. World-Class Manufacturing Expertise
MTWB manufactures the world’s smallest precision ball bearing (0.6mm ID at P4 class).
This same precision engineering and quality control extends to every bearing in their portfolio, including the 626 Low Noise EMQ Bearing.
4. Customization Capability
From precision class to lubrication type to noise/vibration level, the 626 Low Noise EMQ Bearing can be tailored to specific customer requirements.
Q1: What is a 626 bearing used for?
A: It is a miniature deep groove ball bearing for small motors, electric tools, fans and precision equipment.
Q2: How are EMQ bearings different from standard ones?
A: EMQ bearings offer better noise control, lower vibration and smoother rotation.
Q3: Can MTWB customize 626 bearings for OEMs?
A: Yes, we offer OEM customization in grease, clearance, noise and performance.
August 28,2026
다음:627 Low Noise EMQ Bearing
