The linear slides with friction nut use precision ground and rolled spindles that can be directly connected to a stepper motor. This makes them very compact and offers an economical solution for serial use.

They are available in versions with ball screw guide for a higher permissible load or friction guide. The latter can be used completely without grease, which is why they are often used in the pharmaceutical or food industry, but this is also an additional asset in textile machines..  

View the differences between the series and their properties here : bgs-motorized-rails-selector.pdf (haydonkerkpittman.com)