Long-life milling cutter

The utility model relates to a long-service-life milling cutter which comprises a cutter head and a cutter handle sleeved on the outer side of the cutter head in a sliding manner, a spiral groove is formed in the peripheral side wall of the tool bit; one end of the knife handle is fixedly connected with an elastic piece, the knife head is sleeved with a fixing piece, and the fixing piece can be matched with the knife handle in a rotating mode so that the inner edge of the elastic piece can lock or loosen the outer wall of the knife head. The utility model has the effects of repeated use, resource saving and material cost reduction. 本实用新型涉及一种高寿命铣刀，包括刀头以及滑动套接在刀头外侧的刀柄；所述刀头周侧壁上设有螺旋凹槽；所述刀柄的一端固接有弹性件，所述刀头外部套设有固定件，所述固定件可通过转动与刀柄相配合以使所述弹性件内边对所述刀头外壁进行锁紧或松开。本实用新型具有能够多次重复使用，节约资源，降低材料成本的效果。