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Full text of "Modern Mechanical Engineering Vol-I"

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The Mechanical Wood-worker.óNo single machine has effected so
great economies in certain departments of pattern-shop work as the Me-
chanical Wood-worker, developed by Messrs. Wadkin & Co. of Leicester.
Previous to its advent, the statement that a single machine would tackle the
cutting of the teeth of gear wheels, the shaping of sweeps, of bend pipes, and
of the most intricate core boxes, would have been received with incredulity.
Yet this machine performs these functions, in addition to others of a more
general character.

The machine (fig. 85) is supported on a main frame, curved deeply in-

Fig. 85.óMechanical Wood-worker operating on small Spur Wheel.   The whole of the teeth
cut in eight to nine minutes

wards to receive articles of considerable width. On this the overhanging
arm carrying the spindle-head floats up or down on sensitive bearings, with
a range of movement that will permit of its being raised above the hori-
zontal position, or lowered until the spindle is below the level of the work-
table. It can be set exactly horizontally or in any intermediate position.
The spindle head, at the outer end of the arm, swivels between the vertical
and horizontal, and can be locked in each or any intermediate position. It
carries a spindle and a chuck solid with it, ground to a No. 4 Morse taper.
It runs on two double rows of Hoffman ball bearings in dust-proof housings.
It can be rotated in either direction by means of a lever, a feature which is of
much value because it enables cutting to be done with, instead of against, the
grain. The spindle is fed to the work quickly by a hand-lever, and slowly
with a fine screw adjustment by a hand-wheel. The lever motion is controlled