Drill

A drill comprising:

• a housing formed with an outlet hole;
• means for expelling an air stream from the outlet hole;
• a drive spindle projecting from the housing adjacent the outlet hole and centered on and rotatable about an axis;
• a chuck body carried on the housing;
• a tightening sleeve rotatable about the axis on the chuck body;
• a plurality of radially shiftable jaws inside the sleeve;
• interengaging screw formations operatively engaged between the body and the sleeve, whereby relative rotation about the axis of the body and the sleeve shifts the jaws radially in the guides;
• a shield sleeve rotationally fixed to the housing, surrounding the tightening sleeve, and having a rear end juxtaposed with the housing radially outside the outlet hole such that the air stream enters the shield sleeve;
• and
• structure forming inside the shield sleeve forward of its rear end a passage and a particle-expelling hole relatively oriented so as to collect drilling particles and blow them out the particle-expelling hole.