segments of circles, circular slots, etc., on plain and irregular shaped pieces. With the addition of one of these attachments, a vertical spindle milling machine is fully equipped for all varieties of straight
Fig. 34
and circular milling within its capacity. Likewise, one of these
attachments used in connection with a vertical spindle attachment
offers similar advantages on a horizontal spindle machine. Fig. 34
shows an attachment that can be used on our univfe-sal, plain and
vertical spindle milling machines. The table is rotatecf by means of
a worm and wheel, and can be fed automatically in either direction
by power derived from the table feed screw. It can also be
operated by hand when desired. For quick setting, the worm is
thrown out of mesh and the table turned to any position. The
table remains locked in position when the feed is stopped, but
when straight milling or drilling is to be done, an additional clamp,
Fig. 35
operated by a lever at the
side of the attachment, is employed to further insure its
stability. The table is heavy
and has a wide bearing surface; its circumference is
graduated to degrees. The
base is provided with an oil
rim.
A Circular Milling and Dividing Attachment is shown in Fig. 35. This attachment
