齿轮的尺寸容易受季节性温度变换的影响，以至掀开门让一个叉车通过惹起的温度波动都能影响齿轮的尺寸精度，因而模塑厂商须要严酷节制成型区的前提。其它须要思忖的要素还包括：一个稳定的动力提供，可节制聚合物温度和湿度的适宜干燥设施，配有恒定的气流的冷却单位。齿轮加工经常用来替换金属齿轮，如利用塑料的洗衣机传动装置等，这改观着齿轮正在尺寸上的使用限度。塑料齿轮也使用到其它良多领域，如透风和空调体系(HVAC)的减振驱动器、流动设备中的阀门传动、公共歇息室中的主动冲扫器、小型航空器上用的节制表层稳定的动力螺旋器、军用领域中的螺砣仪以及装置。

The size of gears is easily affected by seasonal temperature changes, and even the temperature fluctuations caused by a forklift passing through a flip door can affect the dimensional accuracy of gears. Therefore, molding manufacturers must strictly control the molding area as a prerequisite. Other necessary considerations include: a constant power supply, suitable drying facilities that can regulate the temperature and humidity of the polymer, and a cooling unit with a constant airflow. Gear processing is often used to replace metal gears, such as using plastic for washing machine transmission installation, which changes the size limit of gears. Plastic gears are also used in many other fields, such as vibration reduction drivers in ventilation and air conditioning systems (HVAC), valve drives in flow equipment, active sweepers in public restrooms, power helicoids with constant control surfaces used in small aircraft, screw meters and installations in military applications.