| 摘要 |
An automatic impact driver for applying a large torque to a tip chuck by only pressing down a casing so as to remove corroded screws etc. A cylindrical slider freely movable in an axial direction is disposed in the casing, a cam mechanism is installed in between the slider and the chuck, and the chuck is turned by applying an impact force on a plunger through the slider. Since the impact driver is constructed as described above, a loss of impact transmitting force is decreased as compared with a conventional structure in which the slider is directly struck by the casing.
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