The main advantages of the sliding headstock portion of the machine are that it can load the part into the collet with extreme precision, turn the part very precisely and handle heavy metal removal.
The necklace in Plate IX, based on the hopvine, is set with thirty different colored gemstones, each mounted in a collet setting with two leaves and three conelike blossoms.
In wearing the ring, he noticed that when he turned the collet or face of the ring in toward his palm, he became invisible.
The shaft of the cutting tool fits into a collet , which in turn fits into the chuck sleeve.
Six diamonds in collet settings serve as the ‘prongs’ to hold the hessonite garnet in place.
The collet closer is shaped and sized to, on tightening of the collet closet, radially compress the collet to grip the sheath.
The classic Porter-Cable 690 router is distinguished by auto-releasing collets , micrometer depth-of-cut adjustment, and D-handled bases.
It features a releasing collet that prevents the bit from seizing and comes with both 1/4-and 1/2-inch collets . [The related Porter Cable 693 PK with plunge base kit is also popular. - Ed.]