We rank among the top involved in, Contenders firms production providing and shipping qualitative dorry abrasion testing machine. All these devices enjoy significant popularity by ceramic tile making industry for different tests and checks and other applications. These units can be found in various models and sizes together with can be tailored based on the demands requirements and preferences of customers. Specification it includes a disc rotating about a shaft linked to a reduction gear box linked to a motor. The disc rotates at 28, 30 r. P. M. Under the rotating disc is a tray with an outlet to promote the elimination of sand. Two conical hoppers are installed upon a bracket affixed to the circular tray. An arrangement is made for activate and deactivate the movement of sand. Two holes are offered for mounting two specimens simultaneously.