齒輪的尺寸容易受季候性溫度變換的影響，以至翻開門讓一個叉車通過惹起的溫度顛簸都能影響齒輪的尺寸精度，因而模塑廠商必要嚴酷節制成型區的前提。其它必要思忖的要素還包羅：一個不變的動力提供，可節制聚合物溫度和濕度的適宜干燥設施，配有恒定的氣流的冷卻單位。齒輪加工經常用來替換金屬齒輪，如利用塑料的洗衣機傳動安裝等，這改觀著齒輪正在尺寸上的使用限度。塑料齒輪也使用到其它良多范疇，如透風和空調體系(HVAC)的減振驅動器、流動設備中的閥門傳動、大眾歇息室中的主動沖掃器、小型航空器上用的節制表層不變的動力螺旋器、軍用范疇中的螺砣儀以及安裝。

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.