Crafts rubber tracks are composed by steel core, steel wire and rubber via vulcanization.
The steel core is the main parts to bear the pression of the machine. It is made by forging. And before the vulcanization, the steel cores surface would be cleaned by shot blasting and ultrasonic cleaning, then they would be applied special glue to make sure they will be sticked together with the rubber strongly. Steel wires supply the tension to keep the rubber track always at the specified length, to make sure the rubber track will be not stretched due to the long-term work or any other reason. The rubber for the rubber track is the most important part.