The Thrust Washer (OEM Part No. 3128280815) is a wear part compatible with Ma Cheng E70, Simba E7C, and Boomer XE3C drilling rigs. Made from hardened alloy steel, it is designed for installation in axial load support systems at thrust contact positions. The washer supports axial forces, reduces friction, and ensures smooth rotational or feed movements within the drill assembly. Its durable, wear-resistant construction delivers long-lasting performance under demanding underground mining and tunneling conditions, maintaining mechanical stability, operational efficiency, and reliable load transfer in heavy-duty drilling and bolting operations.