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A variety of contributions to improve the performance of machine

Features

1. Super-high load capacity

By installing rollers that are the largest possible diameter and length within the existing standard cross-section
dimension in a rational layout based on analysis technology, we have realized the world’s highest load capacity✽,
far superior to conventional roller guides. Super-long life is achieved and impact load can be sufficiently handled.

✽ Compared with products of the same size, as of September 1, 2003, researched by NSK.

140 Competitor’s products 350 Competitor’s products
NSK NSK

120 RA45BN RA45BN
300
100
C, kN 250
C0, kN

80

60 200

0 0 The basic load rating which is shown in the figures
complies with ISO standards.
Basic dynamic load rating Basic static load rating Standards for basic dynamic load rating: ISO14728-1
Standards for basic static load rating: ISO14728-2

2. Super-high rigidity

Using NSK’s advanced analysis technology, we pursued a complete, optimal design, down to the detailed shape
of roller slides and rails, thereby realizing super-high rigidity superior to that of competitor’s roller guides.

Direction of 20 20
tension Direction of compression Direction of tension
Direction of Competitor’s products
compression 15
15
Competitor’s products
10 10
Deformation, µm
Deformation, µm
55

NSK RA45BN NSK RA45BN

0 0 5 000 10 000 15 000 20 000 0 0 5 000 10 000 15 000 20 000

Load, N Load, N

Comparison of measured rigidity

3. Super-high motion accuracy

NSK has developed its own unique method of simulating rolling element passage vibration and method of
designing optimal roller slide specifications for damping roller passage vibration. These developments have
dramatically enhanced roller slide motion accuracy for the RA series.

Change of attitude (pitching) Automatic collimator
Linear guide
NSK RA35BN

Displacement 1m

Movement at a given speed Competitor’s products

Conversion to the overhang point of 100 mm 0 20 40 60 80 100
Distance of movement, mm

Comparison of measured motion accuracy

4. Mounting dimensions compatibility

The outer and mounting dimensions of RA series are based on market standards. RA series can be replaced
without altering equipment design. (See page 13 for mounting surface dimensions)

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