16004-ZZ Narrow-Width Deep Groove Ball Bearing | 20×42×8 mm for Gearboxes & Electric Motors

Designed for mechanical assemblies that require reliable radial support within constrained axial spaces, the 16004-ZZ is a premium narrow-profile deep groove ball bearing. Equipped with dual pressed-steel shields (ZZ), it effectively blocks out dust and abrasive debris while securing the factory-applied lubricant inside the raceways. Because these metal shields maintain a non-contact clearance with the inner ring, this bearing operates with minimal rolling friction and drastically reduced heat generation. This makes the 16004-ZZ an excellent solution for 20mm shaft applications, including power transmission systems, high-efficiency electric motors, and industrial textile machinery.

Engineered for mechanical setups requiring dependable radial support within tightly confined axial envelopes, the 16002-ZZ is a high-grade narrow-profile deep groove ball bearing. Fitted with two low-drag pressed-steel shields (ZZ), it blocks harmful dust and particulate matter while ensuring the factory-installed lubricating grease remains sealed within the rolling elements. Because these metal shields operate without touching the inner ring, the 16002-ZZ exhibits minimal starting torque and negligible friction-induced heat. It stands as the ideal selection for 15mm shaft assemblies, such as medical diagnostic equipment, lightweight power tools, and automated testing devices.

The 16004-2RS is a premium-grade single row deep groove ball bearing engineered for applications where space is premium and weight reduction is critical. Featuring a 20 mm inner diameter, a compact 42 mm outer diameter, and a slim 8 mm width, this thin-section bearing delivers exceptional performance without sacrificing structural integrity. Its optimized deep-groove raceway geometry allows it to manage high radial loads alongside moderate axial forces in either direction. Fitted with dual contact rubber seals (2RS), the bearing ensures excellent exclusion of environmental contaminants while locking in high-performance factory grease—making it the ultimate choice for compact electric motors, automated robotics, and precision instruments.

The 16004 Open is a precision-manufactured Single Row Deep Groove Ball Bearing featuring a space-saving thin-section profile without seals or shields. With a 20 mm bore, 42 mm outer diameter, and an 8 mm width, it is engineered for compact mechanical assemblies where external contamination is controlled. Because it lacks closures, this open bearing generates the lowest possible friction, allowing for extremely high rotational speeds and unrestricted access to external lubrication systems. It efficiently supports both radial loads and moderate axial loads, making it an essential component for oil-bath environments, enclosed gearboxes, and precision instrumentation.

Engineered for high-velocity operations where space is at a premium, the 16003-2Z is a premium Single Row Deep Groove Ball Bearing equipped with dual metal shields. Boasting a compact 17 mm bore, 35 mm outer diameter, and a slim 8 mm width, it delivers a highly space-efficient solution for precision machinery. Thanks to its standard deep groove raceway design, this bearing effortlessly manages continuous radial loads alongside light axial forces. Outfitted with double pressed-steel shields (2Z/ZZ) to fend off dust and retain its factory fill of grease, it is the perfect choice for power tools, small electric motors, and robotics where low friction and maximum RPM are critical.

Engineered for maximum rotational efficiency, the 16003 Open Deep Groove Ball Bearing provides an ultra-low friction solution for precision machinery. Measuring 17 mm in bore diameter, 35 mm in outer diameter, with a slim 8 mm profile, this lightweight component belongs to the narrow-width 16000 series. Designed without seals or shields, the open configuration allows for frictionless rotation and easy integration into systems that utilize continuous oil bath or circulating lubrication. It is highly adept at accommodating radial loads and light axial loads in restricted spaces.