Product Introduction
The 628ZZ is a miniature single-row deep groove ball bearing with double metal shields (ZZ type). It is sized 8×24×8 mm, made of high-quality chrome steel. Pre-greased at factory, this bearing features low friction, low noise and stable rotation performance. The non-contact metal shields on both sides keep grease inside and block dust, dirt and debris, making it a cost-effective standard miniature bearing widely used for light and medium radial load applications with limited installation space.
Product Features
- Double-sided metal ZZ shields, good dust-proof performance, no need for frequent re-lubrication
- Low friction coefficient, smooth running, low noise and low vibration
- Capable of bearing radial load and small bidirectional axial load simultaneously
- Compact structure, easy to install and interchangeable with standard 628ZZ dimensions
- High hardness and wear-resistant chrome steel raceway and balls, long service life
- Stable performance at high rotating speed for light-duty equipment
- Standard CN internal clearance, support custom precision grades (P0/P6) and vibration.
Product Parameters
The 628ZZ miniature bearing is widely applied in small electromechanical equipment requiring compact size and smooth rotation:
Small DC motors, brushless motors, micro fans and cooling blowers
Office equipment: printers, scanners, small roller mechanisms
Power tools, small gearboxes and transmission assemblies
Fitness equipment rollers, sliding rollers and hinges
Smart home devices, robotic parts and hobby machinery
Textile spindles, instrumentation and optical equipment
Conveyor idlers, small pumps and actuator components
About Us
Ningbo Kent bearing company was established in 2003 and is one of the leading bearing manufacturers and exporters in China. Kent specializes in the design and production of high precision, high speed and low noise groove ball bearings and pillow block bearings. At present, the Corporation has more than 1,000 employees, a fixed assets of 2 billion yuan, and produces 250 million sets of bearings annually. The Corporation's products are widely used in more than 50 countries and regions under 2 independent brands, namely "BUGAO" and "NBKT".In addition, we participate in major professional exhibitions at home and abroad every year.
Research and Development
Since 2003, the Corporation has set up a Research & Development Center equipped with multiple laboratories used for precision measurement, mechanical testing, lifespan testing, and physicochemical testing, to continuously upgrade its skills and raise its manufacturing standard and product's precision. Our workshops are installed with a series of advanced numerically-controlled, grinding and assembly equipment that utilize centralized filtration and cooling systems. Together with the production equipment suppliers, we developed these grinding, ultra-precision, fully automated integrated production lines, and own the intellectual property rights. The precision level of the products are at P5 level and above, with noise level reaching Z4, V4 and above. Some of our projects have exceeded the 30% precision reserves. Our products are widely used in electric motors, automobiles, motorcycles, household appliances, textile, electric tools and water pump equipment industries, both locally and globally.
Why Choose Us
The company has more than 20 assembly lines, and through ISO9001:2015 quality management system certification, has a professional technical and service team, technical personnel proportion of more than 30%. Over the years, we have been adhering to the use of high-end raw material production, from the first to every step, with excellent product development capabilities and strict quality control, we continue to expand the product line and application range.