P=節距是在帶輪或同步帶中心節線上測得相鄰兩個齒的距離
Pitch is the distance measured from the central line between tow adjacent teech of pulleys and timing pulleys
Dp=帶輪的節圓直徑
pitch circle diameter of belt of belt pulley
De=帶輪實際外圓直徑
External diameter of pulley
帶輪外徑計算方式：ZxP/π-2R=De 即齒數×節距/π-節差線=外徑

T形齒同步帶-輪
    T TOOTHED SYNCHRONOUS BELT-PULLEYS
    帶輪選型圖
    DESIGN HORSEPOWER (HORSEPOWER SERVICE FACTOR)

梯形齒同步帶●輪
LADDER-SHAPED TOOTH SYNCHRONOUS BELT●PULLERYS
同步帶選型圖
DESIGN HORSEPOWER （HORSEPOWER SERVICE FACTOR）


圓弧形齒同步帶●輪/ARC TOOTHED SYNCHRONOUS BELT ● PULLERYS
同步帶選型圖/DESIGN HORSEPOWER （HORSEPOWER SERVICE FACTOR）