| 摘要 |
PROBLEM TO BE SOLVED: To improve accuracy of rotation support by a bearing for supporting rotation, while aiming miniaturization as a power tool.SOLUTION: Since rotation of a second gear shaft 36 is supported by three bearings 37, 381, 382, the rotating shaft center can be held more stably than the case where rotation is supported by two bearings, when supporting rotation of the second gear shaft 36. When receiving rotational driving force of an electric motor 21, the second gear shaft 36 receives the force in the decelerated state in two stages. In this case, since two ball bearings 381, 382 are arranged in parallel on the fitting side of a saw blade 14 of the second gear shaft 36, accuracy of rotation support can be improved in the state of putting emphasis on the fitting side of the saw blade 14. |
