Collet

Claim 2

A collet for insertion in the rotatable spindle of a machine tool such as a drill or the like comprising a rod-like element having one end adapted to receive and hold a tool and the opposite end having a predetermined amount of yieldability and adapted to be inserted into the nose of the rotatable spindle of thE machine tool while holding a tool and to be securely held therein without fasteners as a result of its yieldability without falling out, said opposite end being constructed and defined as a plurality of individual segments machined from the rod-like element and secured thereto at one end, each of said elements being movable outwardly with respect to the longitudinal axis of the rod-like element when the thus defined collet is positioned in a rotating spindle in response to centrifugal forces to cause the segments to tightly engage the grip the spindle and thereby allow the tool to operate on a workpiece.

Claim 3

A collet comprising a cylindrical element having a central bore extending longitudinally therethrough and slidable into and out of a rotatable spindle for a machine tool while holding a tool and to be held therein without fasteners, said element having a section of reduced diameter intermediate its ends, said section being of a greater diameter than the central bore, one end of the element being constructed and defined as a plurality of spaced, cylindrical segments secured to the element and defined integral therewith at one end of the reduced section, the outer diameter of the cylindrical element is defined relative to the rotatable spindle to allow insertion of the collet into the spindle and to be held therein as a result of the spring tension of the cylindrical segment without falling out when the spindle is in a static condition, the end of said element arranged on the opposite side of the reduced section being constructed and defined to receive and secure a tool, said cylindrical segments being further characterized as being outwardly movable in response to centrifugal forces to tightly grasp a spindle thereby allowing the secured tool to be applied to a workpiece for operation thereon.

Claim 4

A collet comprising a cylindrical element having a central bore extending longitudinally therethrough and slidable into and out of a rotatable spindle for a machine tool while holding a tool and to be held therein without fasteners, said element having a section of reduced diameter intermediate its ends, said section being of a greater diameter than the central bore, one end of the element being constructed and defined as a plurality of spaced, cylindrical segments secured to the element and defined integral therewith at one end of the reduced section, the outer diameter of the cylindrical element is defined relative to the rotatable spindle to allow insertion of the collet into the spindle and to be held therein as a result of the spring tension of the cylindrical segment without falling out when the spindle is in a static condition, the end of said element arranged on the opposite side of the reduced section being constructed and defined to receive and secure a tool, said cylindrical segments being further characterized as being outwardly movable in response to centrifugal forces to tightly grasp a spindle thereby allowing the secured tool to be applied to a workpiece for operation thereon.

Claim 5

A collet as defined in claim 2 wherein the cylindrical segments comprise cylindrical segments of sufficient spring characteristic for grasping the adjacent wall of the spindle to allow the driving torque applied to the spindle to be transferred for driving the tool for machining a workpiece.

Claim 6

A collet as defined in claim 3 wherein the cylindrical element is adapted to be used with a rotatable spindle for a drill and is constructed and defined to receive and secure a drill therein, the thus defined collet being constructed to be symmetrical and balanced throughout.

Claim 7

A collet for insertion in the rotatable spindle of a machine tool such as a drill or the like, the collet having an end for securing a tool and an end for insertion in the rotatable spindle and to be rotated thereby including when the secured tool is operating on a workpiece, the improvement comprising the end of the collet insertable in the rotatable spindle while holding the tool being constructed and defined with a predetermined amount of yieldability to be slipped into and out of the spindle and held therein without fasteners as a result of its yieldability without falling out when the spindle is stationary and including means constructed and defined on said one end to be responsive to centrifugal forces generated during the rotation of the spindle to be movable into tighter engagement for securely gripping the spindle to allow the secured tool to operate on a workpiece during rotation of the spindle.

Claim 8

A collet for insertion in the rotatable spindle of a machine tool such as a drill or the like, the collet having an end for securing a tool and an end for insertion in the rotatable spindle and to be rotated thereby including when the secured tool is operating on a workpiece, the improvement comprising the end of the collet insertable in the rotatable spindle while holding the tool being constructed and defined with a predetermined amount of yieldability to be slipped into and out of the spindle and held therein without fasteners as a result of its yieldability without falling out when the spindle is stationary and including means constructed and defined on said one end to be responsive to centrifugal forces generated during the rotation of the spindle to be movable into tighter engagement for securely gripping the spindle to allow the secured tool to operate on a workpiece during rotation of the spindle.