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Dimensions of American Chucks – Douzieme

Dimensions of American Chucks

NAME OF CHUCK. DIAMETER OF BODY IN INCHES.

DIAMETER OF BODY IN MM. LENGTH OF CHUCK IN INCHES. ANGLE OF SHOULDER. PITCH OF

A small chuck for holding drills, made to fit in tail-stock spindles or taper chucks. Fig. 76 illustrates the Gem Pivot Drill Chuck.

An escapement in which, except during the actual impulsion, the escape wheel remains stationary and does not recoil. See Graham Escapement.

The contact point between a wheel and pinion.

The escapement of a time piece in which the balance, or pendulum, is detached from the train, during a portion of its vibration.

The art of constructing dials. The science which explains the principles of measuring time by the sun dial.

The motion work of a watch between the dial and the movement plate.

See Index.

DOG. A clutch. An adjustable stop to change the motion of a machine tool.

The screws with half heads by which a movement is held in its case.

A form of the lever escapement in which a separate roller is employed for the guard action.

A dial having two sinks, one for the hour and another for the seconds hand.

A unit of measurement indicating, 1/12 of a line or 1/144 of an inch. See Gauge.