Chuck is type of clamp that is used for purposes of holding, rotating tools and materials. The collet chuck is an alternating workholding device like jaw chuck; it also uses mechanical force to grapple the part that has been turned. Following are the various types of chuck.

Three-jaw

A three-jaw chuck is a turning clamp that uses three 'jaws', normally they are interconnected via a scroll gear (scroll plate), to hold onto a device or to a work piece. Three-jaw chucks are commonly self-centering (as effect of the jaws' interlocking with the scroll plate) and are greatest suited to grip circular and for hexagonal cross sections when extremely fast,rationally accurate centering is actually desired. Independent-jaw versions could even be obtained.

Three-jaw chucks could normally be found on lathes and as well in indexing heads. Since the jaws on a three-jaw chuck all move in agreement, centering a cylindrical part is just not a concern. The part would run concentric with the three-jaw chuck, as long as there are no foreign particles among the jaws and the part, or that the three-jaw chuck is installed on the spindle properly and the chuck has not dog-eared irregularly. The jaw faces could actually be reversed to provide accommodation in larger diameters. You can notice that themechanism, which moves/guides the jaws, is not detached or reversed.

When the work wants that the part be loaded and then to be unloaded with minimal amount of time and try, then a three jaw chuck is a high-quality choice. Three jaw chucks are also a good quality choice if there is a huge quantity of parts to machine, and the operations being performed do not need a high degree of accuracy or concentricity.

Four-jaw

A four-jaw chuck is alike to a three-jaw chuck, but with four jaws, each of that could be moved separately. This makes them supreme for

(a) Gripping non-circular cross parts and

(b) Gripping circular cross parts with tremendous precision.

The non-self-centering action of the self-governing jaws creates centering extremely handy (only for an experienced user), but at the cost of speed and comfort. Four-jaw chucks are more or less never used for device holding. Four-jaw chucks could also be found on lathes and indexing heads.

Multi-jaw

For extraordinary purposes, and also the holding of easily broken materials, Multi jaw chucks are accessible with six or eight jaws. These are consistently of the self-centering design, and are as well built to very high standards of accuracy.

Two jaw chucks are accessible and could even be used with soft jaws (characteristically an aluminum alloy), which could be machined to be traditional to a specific work piece. Many chucks have detachable jaws that permit the user to replace them with new jaws, dedicated jaws, or soft jaws.