Patent ID: 8827003

Claim:
An impact tool comprising: a motor disposed in a housing; a spindle rotatable by the motor; an anvil supported by the housing and disposed on a front side of the spindle such that the anvil is rotatable coaxially with the spindle, the anvil having a front end portion, the front end portion being configured to receive a tool bit and frontward protruding out of the housing; an impact mechanism including a hammer fitted on the spindle and movable in a front-back direction, balls fitted in and between cam grooves disposed on the spindle and cam grooves disposed on the hammer, and a coil spring whose front end portion is inserted into an annular groove disposed on a rear surface of the hammer and biases the hammer to an advanced position of the hammer, the impact mechanism transmitting rotation of the spindle to the anvil as a rotational impact force; a carrier portion disposed in the spindle and on a rear side of the coil spring, and holding planetary gears for reducing the motor speed; a washer disposed on the front side of the carrier portion and having an annular shape with a frontward extended portion disposed at an inner circumference of the annular shape, an inner diameter of the frontward extended portion being larger than that of the annular groove, and receiving a rear end of the coil spring; and a positioner disposed between the carrier portion and the washer, and positioning the washer coaxially with the spindle.