Multi-test gravelometer

The present invention relates generally to an apparatus for testing the chipping resistance and adherence of surface coatings. More particularly, the invention relates to a gravelometer having multi-standard capabilities so that a user need not purchase a plurality gravelometers each dedicated to a particular testing standard. In accordance with the present invention, a gravelometer base unit selectively receives one of a plurality of target chambers to enclose the sample being tested, and one of a plurality of media guns for propelling the media at the test sample secured in the target chamber. The particular target chamber and media gun utilized depend upon the particular testing standard to be followed. A gravelometer () includes a base unit () comprising compressed air receiver tank () having wheels () and feet (). Main frame () connects tank () to a media gun frame or mount () and includes a bore () for releasably receiving and supporting a media gun () having a mounting flange () so that media inlet () is upwardly oriented and gun barrel or media outlet () extends through gun mount (). Media inlet () interconnects via elongated con-duit () to a media supply system () which includes media supply hopper () and vibratory feeder assembly (). A control system () having operator control panel () controls operations. A modular target box or chamber () is aided in being releasably connected to base unit () by locator pins (). Chamber () includes media inlet (), media outlet (), which connects to spent media reclaim chamber (), and specimen window () having a target holding toggle clamp ().