Application 2:
Washer in the starter's bentex mechanism
The starter motor has a bentex mechanism which is a spring-loaded system that pushes the coupling of the starter motor to engage the spur gear of the flywheel. The spring is encased in a double cap, through which the drive shaft passes. Once the engine starts, the increase in rpm will cause a reversal of the drive. Now the coupling returns back due to the spring pressure. The igus® component WTM-2128-010 S is used between the spring cap and the coupling This acts as a gliding element because of the lower coefficients of friction and isolates the rotary motion thereby safeguarding the costly spring. Earlier the spring used to fail constantly due to twisting, as it used to rotate along with the retreating coupling. This meant the bentex mechanism and the starter wouldn't function any more.