| 摘要 |
PROBLEM TO BE SOLVED: To provide a speed-change attachment for a power tool which can be used while being installed to a chuck portion of a portable power tool, and can rotate a tip end tool at speed exceeding the performance of the power tool.SOLUTION: A speed-change attachment 11 used while being installed to a portable electric tool having a grip portion includes: an input shaft 28 which can be installed to a chuck portion of the electric tool; a speed-change mechanism portion 21 for changing (for example, increasing) the speed of rotations of the input shaft 28; and a chuck portion 14 for outputting rotations whose speed is changed by the speed-change mechanism portion 21. A tip end tool used by the electric tool is detachably installed to the chuck portion 14. |
