The Basic 540 is the top-selling model amongst the STEP-FOUR milling machines. It is the only model available as a kit and therefore attracts many model makers.
due to its coverings the machine is protected against dirt and dust
driven by stepper motors via thread spindles (Ø 12 mm, 3 mm pitch)
bush bearing guidings on hardened and polished steel shafts (Ø 16 mm)
zur