Remove from the lathe and reverse, holding the main shaft in the collet chuck.

A few more practicalities - I use an expanding collet chuck and use either 2in or 3 in jaws for this sort of work.

Expanding collet chucks were used to locate the sheaves by gripping the internal bore, during certain operations.

Fitted with the "Universal Jig", a collet chuck and set up mandrel enables rapid set up of the cylinders.

In this context "chuck" means any type of chuck other than a collet chuck (scroll chuck, independent-jaw chuck, etc.).

"Gripped in the machine's collet chuck was what appeared to be a steel cylinder about 3/4" in diameter with a copper ridge encircling it near the exposed end.

Even on many drill presses, handheld drills, and lathes, which have chucks (such as a drill chuck or collet chuck), the chuck is attached by a taper.

But collet chucks are much smaller and do not project forward as much, so they allow the user to get a hand closer to the work for better control; many craftsmen prefer them for detailed work.

Almost all collet chucks achieve the radial squeezing motion via moving one or more male-female pairs of tapered (conical) surfaces axially, which produces the radial squeezing in a highly concentric manner.

Meanwhile, a collet chuck can deliver all reliably, and with no need for a skilled user (№s 3 to 5 do depend on the object being clamped closely matching the size and shape of the collet's clamping surface.

Many lathes that run collet chucks have dedicated collet-closer setups whereby there is no backplate, and the spindle nose contains the female taper for either the collet's male outer taper, or a sleeve that will hold it.

WDS Store Home Collet and Indexing Attachments For milling, drilling and grinding operations the comprehensive WDS range includes Collet Fixtures and Direct Indexing Units for horizontal or vertical use together with single or double-ended Trunion units.