The 638-ZZ is a Double-Shielded Deep Groove Ball Bearing designed for dependable performance in compact and space-constrained applications. Built with the classic deep groove raceway design, this metric bearing effectively handles radial loads and light axial loads in both directions. With an 8 mm bore and a shielded (ZZ) design for contamination protection, it is an essential component for small electric motors, light-duty gear mechanisms, instruments, and various precision devices requiring smooth, low-maintenance operation.

The 637-ZZ is a High-Precision Miniature Deep Groove Ball Bearing engineered for applications demanding smooth operation, contamination resistance, and reliable performance in compact spaces. With double steel shields (ZZ) securely fitted on both sides, this bearing provides effective protection against airborne dust and fine particles, preserving internal lubrication and ensuring consistently low torque. Featuring a 7mm bore, it is an essential component in small electromechanical devices, sensitive instrumentation, and miniature motor assemblies where space optimization and dependable shielding are crucial.

The 635-ZZ is a High-Performance Miniature Deep Groove Ball Bearing designed for applications demanding reliable operation with superior contamination resistance. Equipped with double metal shields (ZZ) on both sides, this metric bearing delivers effective protection against airborne particles and debris, preserving internal lubrication and ensuring smooth, long-lasting performance. With a compact 5mm bore, it serves as an essential component in small electromechanical devices, precision instruments, and compact motor assemblies where space-saving design and dependable shielding are critical.

The 634-ZZ is a Premium Miniature Deep Groove Ball Bearing engineered for applications that demand compactness and reliable performance. Featuring double metal shields (ZZ) on both sides, this precision metric bearing provides effective protection against dust and contaminants while ensuring low-friction operation. With a 4mm bore and a robust outer diameter, it is an ideal choice for small yet demanding applications such as precision instruments, high-performance micro-motors, and compact machinery where space is limited but durability is required.