Hammer drill

A hammer drill comprising:

• a housing;
• a first ratchet fixed to the housing;
• a spindle rotatably supported by the housing about an axis;
• a second ratchet coupled for co-rotation with the spindle, the second ratchet being engageable with the first ratchet in response to rearward displacement of the spindle to impart a hammering action on the spindle while the spindle rotates;
• a thrust bearing for absorbing an axial load on the spindle in response to the rearward displacement of the spindle, the thrust bearing including an arm extending away from the axis;
• and
• a selector ring including a post extending toward the arm, the selector ring being rotatable between a first position in which the post is engageable with the arm of the thrust bearing to thereby limit the rearward displacement of the spindle and prevent engagement of the first and second ratchets, and a second position in which the post is misaligned with the arm of the thrust bearing to permit the rearward displacement of the spindle and engagement of the first and second ratchets.