NTN-SNR LINEAR AXIS AXC Series Manual page 15

Track roller guides
As track roller guides, various types of rollers can be used, depending on the series.
All sizes of AXC and AXDL series are available with track roller
guides in steel design (Figure 1.23).
This system consists of track rollers which are running on hardened,
ground steel shafts which are pressed into the aluminum profile.
The steel shafts are permanently re-lubricated from outside with
lubricating oil from a refillable oil reservoir. The track rollers are
dustproofed two-row angular contact ball bearing with profiled
outer ring.
Through an eccentric mounting of the half of the track rollers, the
guiding system can be settled exactly, and gets always the right
preload or zero backlashes from our production.
This technology ensures an excellent running performance and
offers the following advantages:
• Very cost efficient guiding system, especially for
long strokes
• Long service life time by the use of dustproofed and
pre-lubricated track rollers placed inside the profile
• Very high velocity up to 15 m/s
• High acceleration up to 50 m/s²
Linear Axis of the AXF series can be equipped optionally with
polymer track rollers (Figure 1.24) as guiding system. In this variant,
the rollers are running directly on the surfaces of the aluminum
profile. The adjustment of the preload is realized via a spring
element in the two-part slider unit during the assembly process.
The polymer track rollers are connected with the slider unit by sliding bearings. Linear Axis with this guiding system can be used even
in wet areas, in areas with heavy contamination or in contact with aggressive media.
This guiding system is characterized by the following features:
• Very high chemical resistance
• Maintenance free and dirt resistant track rollers
• Good mechanical dumping performance
• Inside of the profile arranged track roller system
• Very high velocity up to 7 m/s
• High acceleration up to 30 m/s²
Figure 1.23 __ NTN-SNR – Linear Axis with track roller guide
Figure 1.24 __ NTN-SNR – Linear Axis with polymer track roller guide
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