Used for testing crushed rock, crushed slag, crushed and uncrushed gravel for resistance to abrasion.
|The machine consists of a hallow cylinder mounted horizontally on a sturdy frame on ball bearings. There is an opening which can be closed with a dust tight cover to facilitate charging and discharging the drum with the material under test. A detachable shelf which Extends throughout the inside length of the drum which catches the abrasive charge and does not allow it to fall on the cover. The drum is rotated by an electric motor through a heavy reduction gear at a speed of 30-33 r.p.m. A revolution counter is fitted to the frame. A tray is supplied for collection of the material at the end of the test. Complete with abrasive charges consisting of a set of eleven hardened steel balls, approximately 47mm dia. Suitable for operation on 440 volts, 3 phase, 50 cycles, and A.C. supply.