Press Release

NSK Develops J-Type ROBUSTDYNA™ Bearings for Machine Tool Spindles

Ideal for Heavy Cutting and High-Speed Applications

NSK Ltd. has developed “ J-Type ROBUSTDYNA™ Angular Contact Ball Bearings. ”

The new J-Type line supports heavy cutting and high-speed performance in a single product for efficient machining of general and automotive parts, as well as a longer service life and reduced carbon emissions in manufacturing.

Production will begin in spring 2023, and NSK is targeting 2 billion yen in sales by 2026.

NSK will be exhibiting the new J-type line at “JIMTOF 2022 The 31st Japan International Machine Tool Fair” to be held from November 8-13, 2022.

J-Type ROBUSTDYNA™ Angular Contact Ball Bearings.


In recent years, machine tools have been required to meet demand for heavy-duty cutting in response to increasing utilization of difficult-to-cut materials such as titanium and composite materials, as well as for long-term, stable operation under low-maintenance or maintenance-free conditions.

To meet this demand, NSK aimed to develop a product that achieves both heavy-duty cutting and high-speed performance through higher load capacity.

Product Features

1. High load capacity

By optimizing the bearing's internal design, such as the use of larger diameter balls, the load capacity has been increased by 15% compared to conventional products *1 enabling heavy-duty cutting.

*1 NSK's current H-type Robust Series bearings (SUJ2 version)

2. High speed performance

Optimization of internal specifications has realized high-speed performance equivalent to that of conventional products, enabling use in both low-speed and high-speed applications.

3. Longer operating life

Optimization of internal design and the use of NSK's proprietary long-life steel have resulted in service life up to six times longer than that of conventional products.

Product Features

Product Features

Other improvements in materials and manufacturing methods contribute to reduced carbon emissions and energy savings during manufacturing compared to the X-type ROBUSTDYNA bearings.

Product Benefits

The new J-type ROBUSTDYNA bearings extend service life and reduce machining time during heavy cutting, contributing to improved productivity and long-term stable operation of machine tools.

About NSK

NSK began its journey manufacturing the first bearings in Japan in 1916, and has since developed into a global organization researching, designing, and manufacturing Motion & Control™ solutions essential for mobility and industrial applications. NSK is the top supplier of bearings in Japan and is the third largest supplier in the world by market share.

Our responsive products and technologies enhance automotive performance and industrial productivity while reducing energy consumption to unprecedented low levels. In the early 1960s, we set our sights outside Japan and have established over 200 business locations in 30 countries alongside a vast network of joint ventures and partnerships in all corners of the world.

NSK Corporate Philosophy

NSK contributes to a safer, smoother society and helps protect the global environment through its innovative technology integrating Motion & Control. As a truly international enterprise, we are working across national boundaries to improve relationships between people throughout the world.