three-jaw chuck


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three-jaw chuck

(thrē'jaw chŭk)
A grasp pattern emerging in the 10th-12th month that involves holding an object with an opposed thumb and the index and middle fingers where the interphalangeal joints are slightly flexed. The ulnar fingers are slightly flexed to stabilize the radial side of the hand.
References in periodicals archive ?
A six-jaw chuck, instead of a standard three-jaw chuck is used to ensure true roundness of the parts.
A three-jaw chuck is used for gripping cylindrical workpieces when the operations to be performed are such that the machined surface is concentric with the work surfaces.
They would add a machine mainly dedicated to running bar stock using a collet chuck, then run to a two-jaw or three-jaw chuck running shapes, or castings, with a two-jaw or three-jaw chuck - that requires a long changeover.
Working on the principle of a three-jaw chuck, it centers the part accurately, regardless of workpiece size.
Billet sections are held in a three-jaw chuck mounted on a faceplate, which in turn is fitted to a tapered shank similar to that of a toolholder.
You can change jaws until you are purple, but if you need to go from a three-jaw chuck to a diaprhagm or collet chuck, it ceases to be a jaw change.
Standard equipment includes 7 1/2"-hp, these-phase motor, 10" three-jaw chuck with backplate, 12" four-jaw chuck with backplate, steadyrest, follow rest, full-length splash guard, and four-way toolpost.
The Buck combination two- or three-jaw chuck will also be shown.
The three-jaw chuck allows switching from mandrels to collet chucks to face drivers and centers.
Typically the index and middle fingers move inward on nonparallel planes so as to approach the thumb in a three-jaw chuck fashion.
The NPFLEX-LA utilizes an easy-to-use, three-jaw chuck design to allow for the mounting of shafts for lead angle and surface texture measurements.
After the dynamic analysis of the model of spindle with self-centring three-jaw chuck with the diameter of [phi] 250mm and length of 95mm, and the representative workpiece with 91.