| 摘要 |
PROBLEM TO BE SOLVED: To cool an oil unit even while a driving source for driving the oil unit is stopped, in an oil unit impact tool having the oil unit and a cooling device for cooling the oil unit. SOLUTION: This oil unit impact tool is provided with a motor 11 for driving the oil unit 3, and a second driving source for driving the cooling device 4. The second driving source can be operated independently in relation to the motor 11. Therefore, the cooling device 4 can be operated even if the motor 11 is stopped, and the oil unit 3 can be cooled.
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