628ZZ Deep Groove Ball Bearing – 8×24×8mm Double-Shielded Chrome Steel Bearing for High-Speed Micro Motors & Precision Equipment
Product Description
Product Detailed Description
The 628ZZ deep groove ball bearing (dimensions: 8 mm inner diameter × 24 mm outer diameter × 8 mm width) is a widely used miniature deep groove ball bearing engineered for reliability, low friction, and quiet operation in space-constrained systems. Featuring double metal shields (ZZ) on both sides, it effectively blocks dust, moisture, and contaminants while retaining factory-applied high-performance grease—making it maintenance-free throughout its service life.
The 628ZZ deep groove ball bearing (dimensions: 8 mm inner diameter × 24 mm outer diameter × 8 mm width) is a widely used miniature deep groove ball bearing engineered for reliability, low friction, and quiet operation in space-constrained systems. Featuring double metal shields (ZZ) on both sides, it effectively blocks dust, moisture, and contaminants while retaining factory-applied high-performance grease—making it maintenance-free throughout its service life.
Constructed from high-purity chrome steel (GCr15), the 628ZZ undergoes precise heat treatment to achieve uniform hardness, excellent wear resistance, and superior fatigue strength. Its raceway geometry ensures smooth rolling contact, enabling high limiting speeds and stable performance under continuous rotation. With a dynamic load rating (Cr) of 3.35 kN and static load rating (Cor) of 1.4 kN, it efficiently handles combined radial and light bidirectional axial loads—typical in small electric drives and rotating assemblies.
This bearing is commonly deployed in:
Micro and coreless DC motors
Drone propulsion systems
Computer cooling fans and HVAC blowers
Office automation devices (printers, scanners)
Medical and laboratory instruments
Robotics and hobbyist electronics
Available in ABEC-1 (ISO P0) standard tolerance, the 628ZZ offers cost-effective precision for general industrial use. Optional configurations include rubber seals (2RS), stainless steel or ceramic materials, and custom clearances—all supported through YWS’s OEM/ODM services.
Manufactured by Jinan Yuki Bearing Co., Ltd., a trusted ISO-certified supplier since 2013, the 628ZZ combines global quality standards with competitive pricing. Ideal for bulk procurement in automation, consumer electronics, and light industrial sectors seeking reliable, off-the-shelf miniature bearings.