| 摘要 |
PURPOSE:To simplify the fitting job of a tool by forming a projection for tool fitting provided on the tip of an arbor into a non-spherical shape, and by fitting and locking into the said projection a nut screwed into the central hole of the tool. CONSTITUTION:The central opening 37 of a nut 30 screwed into a tool 10 is set around the projection 21 of an arbor 3 formed into a rectangle. By tuning the nut 30, the tool 10 is pressed to the side of the arbor 3, and positions where the nut 30 corresponds to the projection 21 are shifted, allowing the tool 10 to be fitted and locked to the arbor 3. The amount of revolutions of the nut 30 is restricted by a bolt 16. |
