Testwel Instruments Company supplies Abrasion Testing Machine with Hollow Cylinder The Company also offers aggregate, stones tiles and testing instruments, cement, lime, plaster and motor testing instruments, concrete testing instruments, soil test instruments, bitumen testing instruments, rock testing instruments, material testing instruments etc. The Abrasion Testing Machine with Hollow Cylinder is used for determining the resistance to wear of small size coarse aggregates and crushed rock. The Abrasion Testing Machine with Hollow Cylinder is mounted on a sturdy frame and has ball bearings. This Machine has detachable shelf.