Patent ID: 8484827

Claim:
A method of assembling a hand held electrically powered drilling and/or hammering tool having a tool housing and a spindle mounted within the housing; comprising the steps of: making a motor sub-assembly including a motor, an armature shaft and a radial fan, the fan having a plurality of blades, and mounting the fan on an end of the armature shaft at a first end of the motor with the blades facing away from the motor; balancing the motor sub-assembly; mounting the sub-assembly within the housing, with the longitudinal axis of the armature shaft at an angle to the longitudinal axis of the spindle and with the first end of the motor closest to the spindle axis, on that in use of the tool the fan rotates at the first end of the motor to draw air into the housing, push air through the motor and out of the housing proximate to a second end of the motor, which second end of the motor is remote from the spindle axis and proximate to a commutator.