| 摘要 |
PURPOSE:To provide a hole finishing tool and a finishing method through which hole finish of a deep hole or a through-hole is effected simply with high precision. CONSTITUTION:Four taper grooves 2 are formed in a shaft 1 and thread parts 3a and 3b are formed in a manner that the thread parts are positioned in the vicinity of the upper lower end parts of the taper groove 2. Grinding wheel blades 4 are removably fitted in the respective taper grooves 2. The grinding wheel blade 4 has a bottom surface 5 forming a slope and an upper surface on which a grinding wheel layer 6 is formed. Fixed nuts 8a and 8b are rotated and moved in the direction of the length of the shaft 1 and an amount of protrusion of the grinding wheel blade 4 from the shaft 1 is variable. |
