A METHOD AND A GRINDER DEVICE (10) FOR MAKING A HOLE, SLOT AND/OR DEPRESSION (34) IN A NEEDLE (20) PROXIMAL TO ITS TIP (32), SAID GRINDER DEVICE (10) COMPRISING A STRIP (22) SECURING IN PARALLEL ALIGNMENT PLURALITY OF CATHETER NEEDLE TUBES (20) EXPOSING THE TIPS (32) OF THE NEEDLES (20)； HOLDING MEANS ASSEMBLY (12) FOR THE SAID STRIP (22) COMPRISING AT LEAST TWO HOLDING PLATES (16, 18) FOR CLAMPING THEREBETWEEN THE SAID STRIP (22)； A GRINDER WHEEL ASSEMBLY (28) HAVING A GRINDING WHEEL (40) WITH GRINDING SURFACE (30) POSITIONED ADJACENT SAID HOLDING MEANS ASSEMBLY (12)； A MOVABLE TABLE (14) OPERABLY MOUNTED ON THE GRINDER DEVICE (10) CONFIGURED TO MOVE THE SAID HOLDING MEANS ASSEMBLY (12) THEREALONG FOR CHANGING THE POSITION OF THE NEEDLE TUBES (20) SUPPORTED IN THE SAID STRIP (22) BY SAID HOLDING MEANS ASSEMBLY (12). FIG. 1
