Collet-stop assembly

A collet-stop assembly for positioning a work-piece longitudinally within a collet to be mounted in a collet-holder of a rotary machine, said collet-stop assembly comprising:

• a. a stop-unit against which the work-piece is to be butted,
• b. a stop-collar for holding said stop-unit rigidly with respect to said stop-collar, wherein said stop-collar has an internal stop-unit-gripping surface,
• c. a collar-retainer connectable to said stop-collar with collar-retaining means, and
• d. means to rigidly couple said collar-retainer to said collet,
• wherein all tightening adjustments to said collet-stop assembly are performable at a distal end of said collet-stop assembly with a single-sized wrench.

A a single-sized-wrench method of positioning a workpiece in a collet securable to a rotary machine collet mount, said method comprising the steps of:

• a) coupling a stop-collar to an interior surface of a collar-retainer;
• b) threading said collar-retainer into a distal end of said collet;
• c) inserting a distal end of a stop-unit into a through-hole in said stop-collar;
• d) placing a distal end of said workpiece against a proximal end of a stop-unit;
• e) tightening said stop-collar around said stop-unit by a collar-securing means;
• and
• f) securing said collet to said collet mount.

A method of securing a workpiece in a particular location within a collet, said collet being securable to a rotary collet mount, said method comprising the steps of:

• a) inserting a plurality of jaws of a stop-collar in a distal end of a collar-retainer;
• b) inserting a plurality of machine-screws into a plurality of through-holes in said distal end of said collar-retainer, each of said through-holes being axially aligned with a threaded hole located in a distal end of said jaws;
• c) mating said each of said jaws to said collar-retainer by hand-tightening each of said plurality of machine screws, such that each of said screws matingly engages said threaded hole;
• d) loosely threading said collar-retainer into a distal end of said collet;
• e) inserting a stop-unit through a stop-collar aperture and a collar-retainer aperture, said collar-retainer aperture being axially aligned with said stop-collar aperture;
• f) placing the workpiece at a proximate end of said stop-unit such that the workpiece is located at a desired position;
• and
• h) tightening said machine-screws using a mechanical tightening means.