in the precision process of accessories processing, assembling machine equipment plays a very key role, of which the concentric roller top is a unique design. When the processing process is started, the power system of the assembly equipment stably outputs and drives the concentric roller top center to operate accurately. The concentric roller adopts special material and precision manufacturing process to ensure extremely high roundness and surface smoothness, and can act on the surface of the parts with uniform and stable pressure at the moment of contact with the parts to be processed. With the continuous operation of the equipment, the concentric roller top center with excellent concentricity, so that the accessories in the rotation process always maintain accurate axis positioning, effectively avoid the processing error caused by eccentricity. Whether it is processing small precision parts, or relatively complex large parts, this concentric roller top can show its unique advantages, strictly control every processing detail, so as to efficiently create high-quality accessories that meet the requirements of high precision, providing a solid foundation and strong guarantee for the production and manufacturing of related industries. Greatly improve the overall production efficiency and product quality level.