Deval Attrition Tester

For determination of resistance of aggregates to wear by abrasion. It consists of two hollow cylinders closed at one end and provided with tight fitting covers at the either end. These cylinders are mounted on a shaft at an angle of 30 degrees with the axis of rotation of the shaft. The shaft rotates at 30-33 r.p.m. through a reduction gear operated by a motor and is provided with a revolution counter. Complete with abrassive charges consisting of 12 Nos. Hardened steel ball of 48mm dia. Suitable for operation on 440 volts, 3 phases, 50 cycles.