A bone drill is presented to solve the problems of bone bits are usually washed away and bone temperature rises too much. This bone drill comprises a handle and a drill bit, with a base portion of the drill bit is integrally formed with one end of the handle. The drill bit also has a plurality of lateral walls, a buffer portion and a cutting portion with the plurality of lateral walls are set apart and arranged around the other end of the base portion of the drill bit, to forms a collection chamber inside the plurality of lateral walls. The collection chamber has an opening between any two adjacent lateral walls, so that the collection chamber is able to communicate with outside. The two ends of the buffer portion respectively receive with the plurality of lateral walls and the cutting portion.一種骨鑽削刀具,用以解決傳統鑽頭鑽削時骨屑易流失及骨組織溫升過高的問題。該骨鑽削刀具包含一柄桿及一鑽頭,該鑽頭由一基部一體連接於該柄桿的一端;該鑽頭另具有數個側牆、一緩衝部及一切削部,該數個側牆呈相互間隔地環狀排列於該基部的另一端,以於該數個側牆的內部形成一集屑室,且該集屑室在任二相鄰的側牆之間形成一與外部連通之開口,該緩衝部的二端分別連接該數個側牆及該切削部。1‧‧‧柄桿11‧‧‧卡掣部12‧‧‧防轉部2‧‧‧鑽頭21‧‧‧基部22‧‧‧側牆221‧‧‧外側面222‧‧‧內側面223‧‧‧端面224‧‧‧導斜面224a‧‧‧第一端224b‧‧‧第二端23‧‧‧集屑室231‧‧‧開口24‧‧‧緩衝部25‧‧‧切削部251‧‧‧切削刃251a‧‧‧第一端251b‧‧‧第二端252‧‧‧尖端H1‧‧‧第一最大軸向高度H2‧‧‧第二最大軸向高度
