42 of receiver 19 and discharges the air water and solids into liquid solid separator 87 in use of the method of operation of the abrasive waterjet cutting system is as follows a continuous supply of ultra high pressure water from intensifier 13 is directed to cutting head 14 a high velocity small stream or jet of water flowing through cutting head picks up grit in the cutting head and is discharged as an abrasive waterjet 17 through nozzle 36 toward work piece 11 the high velocity abrasive waterjet 17 cuts work piece 11 along a selected pattern to make a product the water grit and particulate materials from the work piece 11 flow downwardly or below the work piece into receiver 19 gear head motor 68 is operated to continuously rotate body 37 with tube 40 liner assembly 48 and rod 64 of receiver 19 the x y controls 18 and 84 operate in response to computer commands simultaneously move cutting head 14 and receiver 19 to cut work piece 11 according to the desired shape and collect water grit and work piece particulate materials jet 17 along with the grit and particulate materials from work piece 11 is directed through inlet opening 41 into the elongated chamber 42 these materials as shown by the arrows in fig4 strike the upper end 66 of rod 64 and inner wall of sleeves 57 59 as they are rotated the materials flow through holes 56 and 52 in spacers 54 and 51 and out through outlet passages 47 and 76 to a disposal location a vacuum force is applied to outlet tube 74 with vacuum generator 86.