The Stone Hammer Blow Testing Instrument Multigrit Tester 508 VDA is an electro pneumatically managed multi blow tester that can be connected to the stationary 3/8 in compressed air supply.
It consists of a shot jet unit that has a compressed air vessel, acceleration tube and a pressure reduction valve. It also has an adjustable vibrating feeder for impact particles and operators control panel. This panel consists on a main switch, switch for the stone hammer movement initiation, feed time adjustment, and a multifunctional display that allows reading of the duration, working pressure, number of tests conducted and the settings of the vibratory feed. It also has a manual specimen applying device.