The wear of the spiral bevel gear pair during its service life can be compensated by axial displacement, allowing them to continue working without replacing spare parts. This is a major advantage in the maintenance of bevel gear pairs (including straight and helical teeth). However, when the wear is to a certain extent and the axial adjustment cannot be performed, a new one needs to be replaced to ensure the normal operation of the equipment.
Zhoushan Jinsheng Bimetallic Plastic Machinery Factory , https://www.jinshenggalloy.com