Rotational　atherectomy　is　an　effective　treatment　for　severe　vascular　calcification　obstruction,　and　relies　on　high-speed　grinding　(typically　130,000-210,000　r/min)　with　miniature　grinding　tools　to　remove　calcified　tissue　and　restore　blood　flow.　However,　reports　of　intraoperative　complications　are　common　because　of　the　grinding　force,　temperature,　and　debris　directly　acting　on　the　body　during　the　grinding　process,　which　can　easily　cause　damage　to　patients.　In　this　study,　three　novel　grinding　tools　were　designed　and　fabricated　and　a　series　of　experiments　have　been　conducted　to　analyze　the　effects　of　tool　geometry　and　parameters　on　grinding　performance,　that　is,　force,　temperature,　and　specimen　surface　morphology.　The　results　show　that　these　tools　can　effectively　remove　simulated　calcified　tissue　and　that　they　have　two　motions,　rotation　and　revolution,　in　the　tube.　At　higher　rotational　speeds,　grinding　force　and　temperature　increase　noticeably,　while　the　amount　of　debris　decreases　significantly.　In　addition,　by　observing　the　surface　morphology　of　the　specimens,　we　concluded　that　the　material　removal　rate　per　unit　time　is　influenced　by　both　rotational　speed　and　tool　geometry,　and　that　high　rotational　speed　and　a　rough　tool　surface　can　improve　the　material　removal　rate　efficiently.　[GRAPHICS]