ELECTRIC TIGHTENING TOOL

摘要

PROBLEM TO BE SOLVED: To provide a electric tightening tool which reduces high peak pressure generated in oil pulses when a bolt is tightened and prevents a lowering of a tightening torque due to oil leak. SOLUTION: An elastic body 7 is provided between a planetary gear mechanism part 3 and a hammer case 6. The elastic body 7 is also provided on the outer periphery of the connection part 8 between the planetary gear mechanism part 3 and an oil pulse mechanism part 4.