Rotary hammer

A rotary hammer adapted to impart axial impacts to a tool bit, the rotary hammer comprising:

• a motor;
• a spindle coupled to the motor for receiving torque from the motor;
• a piston at least partially received within the spindle for reciprocation therein;
• a striker received within the spindle for reciprocation in response to reciprocation of the piston;
• an anvil received within the spindle and positioned between the striker and the tool bit, the anvil imparting axial impacts to the tool bit in response to reciprocation of the striker;
• a retainer received within the spindle for selectively securing the striker in an idle position in which it is inhibited from reciprocating within the spindle;
• and
• an O-ring positioned between the retainer and the spindle, and disposed around an outer peripheral surface of the anvil;
• wherein the O-ring is compressible in response to the striker assuming the idle position, wherein an inner diameter of the O-ring is reduced in response to being compressed, and wherein the compressed O-ring imparts a frictional force on the outer peripheral surface of the anvil to decelerate the anvil.