The guide/carriage system is made up of a profile that acts as a running track and of a unit with track rollers, acting as a slide or carriage. The profile may be made of light alloy, with inserted races made of hardened material or alternatively of other material that is able to sustain the running contact elements. There is a special version in which the profile is split longitudinally into 2 symmetrical parts, each bearing a raceway. This track roller system can be used to create curved and circular sections. The track rollers are bearings with rather thick outer shell to be able to withstand static contact and fatigue loads; they are usually profiled in order to better copy the supporting surface. They are fixed with pins – which in some versions may even be a part of the bearing itself – in the cylindrical, concentric and eccentric version – the latter to be able to register and recover contact clearances.
These special constructional features make it possible not only to use the plates supplied with the unit and pre-arranged to house the track rollers, but also to mount them directly on the unit that they are to drive or even on plates made by the user, according to the required configuration. The guideways with track rollers are extremely quiet and enable considerable accelerations and speeds, even over rather long work routes.