JMT - 309
DEVAL ATTRITION TESTER
BS : 812.
For testing aggregates for resistance to 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 and an angle of 30 degree 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 change consisting of 12 Nos. Hardened steel balls of 48mm dia. Suitable for operation on 440 volts, 3 phases, 50 cycles. A.C. supply.