IMPACT ROTARY TOOL

摘要

An impact rotary tool (10) comprises a driving source (11) that is supplied with power from a battery pack (V) and that rotates a hammer (14) via a drive shaft (13), and a controlling unit (50) that controls the driving source (11). The controlling unit (50) controls the driving source (11) so that the striking force is limited by PWM control when the battery pack (V) voltage is high and the striking force is maintained even when the battery pack (V) voltage decreases.