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NSK Technology for Machine Tools

NSK Roller Guides RA Series

>> CAT. No.E3328

The most advanced roller guides, the
culmination of NSK’s advanced
craftsmanship, especially in analysis
technology and tribology. Featuring
high-load capacity, high rigidity and a
complete lineup, the RA Series is
appropriate for a wide range of
applications.

NSK developed RA Series roller guides, the
world leader in super high rigidity and high-load
capacity, to switch the sliding guides of
machine tools to roller guides. Specifically
designed retaining pieces and roller circulation
components ensure outstanding motion
accuracy.

1. Long operating life Example of bearing deformation analysis

High-load capacity Example of analysis of pressure distribution on
The world’s premier high-load capacity, taking full advantage of NSK’s analysis technology, the roller contact surface
ensures long operating life.
45˚
Maintenance free 45˚
Reliability of lubrication is improved through the use of NSK K1™ for long-term maintenance-free
operation.

Highly dust-resistant specification
A high performance seal, provided as standard, prevents the entry of foreign matter and
maintains the original level of sound performance for extended periods of time.

2. High accuracy and high rigidity

High rigidity
The optimum size of the roller used as a rolling element ensures high rigidity and supports more
compact machinery.

High-motion accuracy
Vibrations generated by roller passage are substantially reduced by NSK’s unique design
method, thereby improving machining quality.

3. A wide range of applications

A complete lineup
A full lineup, from small and large options to low-profile units. A variety of products are available to
choose from, according to the customer’s specific application. (RA15, RA20, RA25, RA30,
RA35, RA45, RA55 and RA65)

Mounting dimensions compatibility
RA Series dimensions are based on global standards allowing replacement without altering
equipment design.

Cross-sectional view

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