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 ?
Mainly targeted to those with a SCI between C5 and C7, the glove fits over the user's index finger, middle finger and thumb to form what is technically called the "three-jaw chuck" or power grip.
To drill the bore, I used my lathe with a three-jaw chuck and drilled a bottomed 33/64" hole 5 1/8" deep to the edge of the drilled hole.
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 91.5 mm and length of 88 mm, the following values of three first frequencies of free vibrations.
The lathe as a standard was equipped with a three-jaw chuck Samchully FTC-190H (length of jaws--43 mm).
It is equipped with a 10" hydraulic three-jaw chuck. The machine's 30-hp vector dual-drive spindle spins to 4,800 rpm, and provides 250 ft-lb of torque at 700 rpm.
The keyless three-jaw chuck was an improvement over the more common collet arrangement, which requires a small spanner to tighten.
A three-jaw chuck unable to repeatedly match 0.0005 is not recommended.
The three-jaw chuck allows switching from mandrels to collet chucks to face drivers and centers.
The clamping pins can be used to clamp a standard 6" vise, a three-jaw chuck, a customized fixture, or even a pneumatic fixture.