Chuck assembly for a rotary power tool

A chuck assembly for a rotary power tool, the chuck assembly comprising:

• a body rotatable about a central axis, the body including a plurality of openings and an external threaded portion;
• a plurality of jaws received within the plurality of openings in the body;
• a collar surrounding the body, the collar including a stepped portion configured to engage the plurality of jaws;
• a plate coupled for co-rotation with the collar, the plate having an internal threaded portion configured to engage the external threaded portion of the body such that, when engaged, rotation of the collar and the plate relative to the body causes the collar and the plate to move axially along the body;
• and
• a locking assembly configured to selectively prevent rotation of the collar and the plate relative to the body.

A chuck assembly for a rotary power tool, the chuck assembly comprising:

• a body rotatable about a central axis, the body including a plurality of openings and a plurality of sizing groove sets formed on the body, each sizing groove set including a plurality of helical grooves;
• a plurality of jaws received within the plurality of openings in the body;
• a collar surrounding the body, the collar configured to rotate around the central axis and move axially along the central axis relative to the body, the collar configured to engage the plurality of jaws;
• and
• a plurality of projections coupled to the collar and configured to move with the collar relative to the body, wherein the plurality of projections is configured to engage the plurality of sizing groove sets.