In　this　paper,　an　experimental　investigation,　based　on　force　special　parameters,　is　adopted　to　analyze　the　relationship　between　the　milling　tool　and　adhesive　phenomena　in　milling　C17200.　Generally　speaking,　the　adhesive　characteristics,　force　fluctuations,　and　tool　failure　are　the　main　factors　affecting　the　impact　of　the　cutting　process　on　tool　wear　patterns.　However,　difficult-to-cut　materials,　such　as　the　beryllium–copper　alloy　C17200,　require　machining　processes　with　tools　with　lives　that　are　difficult　to　predict,　due　to　their　excellent　mechanical　properties.　To　analyze　the　tool　failure　process,　a　series　of　experiments　based　on　cutting　speed　and　tool　geometry　are　presented　in　this　paper　to　observe　the　adhesive　effect　on　tool　flank　surfaces　and　force　fluctuations.　The　results　show　that　the　variation　of　special　force　parameters　in　different　directions　reveals　that　the　thermal–mechanical　effect　on　sticking　substances　reached　a　possible　peak　value,　with　inflection　points　in　different　parameters　at　200　m/min.　The　sticking　substances　and　tool　surfaces　(observed　by　energy　disperse　spectroscopy　and　scanning　electron　microscope),　wear　capacity,　and　back-scattered　electron　imaging　also　confirmed　that　adhesion　in　the　wear　zone　reached　a　peak　value　at　200　m/min　in　the　cutting　process,　exacerbating　the　adhesive　effect　on　tool　failure.　©　2019　by　the　authors.　Licensee　MDPI,　Basel,　Switzerland.