D3 Faster work machines, more complex tools and the increasing use of tungsten carbide make the issue of the ideal tool guidance system more important than ever in terms of the basic considerations for the designer. A basic distinction is made between rolling guides and sliding guides. The rolling guide has a very high accuracy and operates almost backlash-free under preload. As ideal as rolling friction is in terms of friction, the disadvantage will always be a certain amount of guide displacement. This disadvantage is particularly noticeable in tools with unfavourable geometry and pressure distribution. The aforementioned weaknesses of the roller bearing can be countered by oversizing to a certain extent. Today, sliding guides of any kind can be manufactured with the narrowest tolerances in cylindricity and circularity. When properly paired with selected play, they give the tool greater rigidity than the rolling guide. An uncertainty factor with sliding guides is always the possibility of tearing off the lubricating film with the associated short transition from liquid friction to mixed and dry friction. Even automatic pressure oil lubrication does not always make it possible to hold the lubricating film securely, especially with short stroke movements. From these and similar problems the FIBRO guide element program has been developed, which is intended make it easier for the design engineer to select suitable and standardised components for solving guide problems in tools, fixtures and special machines. We reserve the right to make changes, as technology is subject to change due to new findings and further developments. GUIDE ELEMENTS
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