Motors:
Turbine max 300 000rpm
Electromotor max 40. 000 rpm
Airmotor max 20 000 rpm
Handpieces:
Blue 1:1
Red: 1 :5
Green: 1 : 2,6 or 1: 7,5 to slow
Diamonds:
Black – extracoarse (crowns and fillings removal)
Green – coarse (start of preparation e.g. in prosthetics)
Blue – standard (preparation of cavities)
Red-fine (finishing walls of cavitis)
Yellow – extrafine (finishing of composites)
White – ultrafine (polishing of composites)