Effects of Variable Load and Rotational Speed on the Wear Behavior of POM Plastic Helical Gear

Kepenek M., Diler E. A. , Ulcay Saban F.

2nd International Conference on Innovative Studies of Contemporary Sciences, Tokyo, Japan, 17 - 19 August 2020, pp.102

  • Publication Type: Conference Paper / Summary Text
  • City: Tokyo
  • Country: Japan
  • Page Numbers: pp.102


Gears made from plastic materials, the properties of which are constantly being developed, have begun 

to be widely used in a number of applications such as the automotive, textile, agricultural and food 

industries, although steel gears are still highly due  to their high mechanical properties. On the other 

hand, wearing is one of the most important problems with gears. For this purpose, the wear behavior 

of plastic gears was investigated in this study. In order to compare to the wear behavior of steel gears, 

plastic gears were also made of Polyoxymethylene (POM) plastic material. The weight and tooth 

thickness of the steel and POM gears were equal to each other, and the sizes (dimensions) of the gears 

were determined by the modification of the module and the  diameters of the gears. In addition, two 

different types of gears, which are spur and helical gear, were produced to investigate the wear 

behaviors of the gears made of steel and POM materials. The effects of variable load and rotational 

speed on the wear behavior of the gears were studied using the gear-on-gear wear testing method. The 

wear behavior of the gears was determined by calculating the weight loss of the samples. Under the 

same loads and speeds, the weight loss of the helical gears was lower than  in the steel and POM spur 

gears. The weight loss in the gears increased with an increase of the load and the speed.  The wear 

resistance of the steel and POM gears at the same weight was close to each other. It was concluded 

that helical POM gears can be preferred over steel gears in some applications due to the advantages of 

plastic gears, such as low cost and high corrosion resistance.