The development of a novel design for the toothed segment of drive transmission in longwall shearer is expected to significantly reduce
the cost of individual components of the feed system and the related work of repair and renovations, increasing at the same time the safety
of mine repair teams.
The conducted experimental and numerical analysis of the state of stress and strain in the innovative design of the toothed segment has
enabled estimating the maximum effort of the developed structure. Based on the results of fundamental mechanical studies of the cast
L20HGSNM steel and fatigue tests combined with the numerical stress/strain analysis, the fatigue life curve was plotted for the examined
casting of the rack.