;)
As per IS: 2386 (Part - IV)
Also known as Deval Abrasion Testing Machine. Used for determination of resistance of aggregates to wear by abrasion.
Specifications:
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 abrasive charges consisting of 12 Nos. Hardened steel ball of 48mm dia. Suitable for operation on 440 volts, 3 phases, 50 cycles. A.C .supply.