6004 ZZ NR NSK Deep Groove Ball Bearing 20x42x12

Design and manufacturing quality

The 6004 ZZ NR deep groove ball bearing from NSK is a single row bearing engineered for precise and long-term industrial operation. With standard dimensions 20x42x12, it is widely used across electric motors, gear units and general machinery.

The ZZ metal shields on both sides protect the rolling elements against dust and solid contaminants while enabling high rotational speeds. The NR feature indicates a groove in the outer ring for a retaining ring, allowing secure axial positioning of the bearing inside a bearing housing. This combination ensures stable operation, low friction and consistent performance over the bearing’s service life.

Industrial applications

The 6004 ZZ NR NSK deep groove ball bearing is commonly used in industrial applications where reliable axial location and operational stability are required. Typical uses include electric motors, fans, conveyors, production machinery and drive systems.

Thanks to its deep groove design, the bearing supports radial loads as well as moderate axial loads in both directions. It can be installed as a standalone bearing or as part of a complete bearing unit working together with a bearing housing.

Key advantages for B2B customers

For B2B customers, the 6004 ZZ NR NSK offers proven quality, predictable performance and reduced maintenance requirements. Factory lubrication, metal shields and the snap ring groove simplify installation and minimize downtime. This makes the bearing a preferred choice for OEMs, maintenance departments and industrial service providers seeking reliable standard solutions.

Main product description

The 6004 ZZ NR NSK deep groove ball bearing 20x42x12 is designed for continuous industrial operation where durability and secure axial positioning are essential. Precision manufacturing ensures smooth rotation, low rolling resistance and quiet running. The ZZ shields retain lubricant and protect internal components, while the NR groove enables fast and safe mounting within a bearing housing.

This deep groove ball bearing performs reliably in both new machine designs and replacement applications. Its versatility allows use in various industrial sectors, providing long service life and stable load distribution in demanding operating conditions.

FAQ - frequently asked questions

What does NR mean in a 6004 bearing?
NR indicates a groove in the outer ring for a retaining ring used for axial location.

What is the purpose of ZZ metal shields?
They protect the bearing from contamination and allow high-speed operation.

Is the 6004 ZZ NR NSK suitable for electric motors?
Yes, it is widely used in electric motors operating under continuous load.

What types of loads can this bearing handle?
It supports radial loads and moderate axial loads in both directions.

Is the bearing ready for installation?
Yes, it is factory-lubricated and ready for immediate use.