Belts basic function is power transmission or turnover moment transmission over the pulleys from one shaft (axle) to enother.
- Lp, Lw
- - belt pitch lenght of tensioned V-belt in netural fibers the V-belt section which keep the same length when being deformed in sectio during the transition of the V-belt from the rectilineal to the circular motion under the constant V-belt tension
- La
- - outside V-belt length measured on the outer V-belt base in tensioned condition
- Li
- - inside V-belt length measured on the inner V-belt base in tensioned condition
- b
- - V-belt width – longer base of trapezoidal V-belt profile
- h
- - V-belt height – height of the trapezoidal V-belt profile
- bw
- - pitch V-belt width – the width of a V-belt on the spot of the neutral fibres of the belt
- dw
- - pitch pulley diameter – diameter of cylindrical surface – the surface staight lines of which are determined by the pitch pulley groove width