Timing pulleys mate with same-pitch timing belts in synchronous drives. Some timing pulleys are designed with an inch-based pitch designation. Timing pulleys are used in power transmission systems where maintenance of speed ratio is an important design consideration. These synchronous belt drive systems are durable, highly efficient, and suitable for many different applications.AYCG timing pulleys have a spacing or pitch based on inch (in.) measurements and a toothed, trapezoidal form.Material: UHMWPE / HDPE / Nylon/ POM OD: customized , 10mm-1500mmBore size : as require.Thickness: 10mm-300mmPitch: follow ANSI. timing pulleys with an MXL, 40-DP, XL, or L pitch designation are designed for light duty applications. By contrast, pulleys with an H, XH, or XXH pitch designation are designed for heavy duty use.Processing technic: mold pressing , machining, casting.Advantage: 1, Light weight , 2, wear resistance 3, free-noise