同步带分单面有齿和双面有齿两种，简称为单面带和双面带。双面带按齿排列的不同，有D型(对称齿廓)和DⅡ型(交错齿廓)之分。内外面都有齿的齿形带适用于旋转方向改变的多轴传动。目前同步带及带轮常用齿廓有梯形、渐开线、圆弧、抛物线等，齿廓一般用滚刀或插齿刀加工。在我国，梯形齿同步带传动已制订有九项国标，但圆弧齿同步带传动还未有国家标准，纺织工业部统一了国内高扭矩同步带单圆弧齿和双圆弧齿两大类带和轮的齿廓尺寸，制订了六项行业标准。
On the belt classification
The timing belt sub-sided teeth and teeth two kinds of double-sided, referred to as single-sided tape and double-sided with. The double-sided with a different arrangement according to the tooth, D-type (symmetric tooth profile) and D-type II (staggered tooth profile) divided. Within the outside has the teeth of the toothed belt to apply a multi-axis drive in the direction of rotation changes. Belt and pulleys commonly used tooth profile has a trapezoidal, involute, arc, parabola, the tooth profile is generally hob or shaper cutters processing. In China, the trapezoidal tooth synchronous belt drive has drawn up nine GB Arc tooth synchronous belt has yet to have national standards, the Ministry of Textile Industry unified domestic High Torque Timing of single arc gear and double arc gear the two class with a round tooth profile size, developed a six industry standard
