Heavy truck drum brake pads are usually riveted to the brake shoes with rivets. During the braking process, the brake pads and the brake drum are in contact for a moment, and the impact force is very large. Pay attention to the impact strength of brake pads when making heavy-duty truck drum brake pads. If this indicator does not meet the requirements, it is possible to place the brake pads during the braking process. The impact at the rivet hole breaks, causing the entire brake pad to become a fragment.