Page:Practical Treatise on Milling and Milling Machines.djvu/136

130 Milling Slide Seat of Vise on a No. 4 B Heavy Plain Milling Machine

This is the second operation on the casting shown in the preceding illustration. The cut is a simple, but heavy one, being 17 inches wide and $3⁄32$ of an inch deep.

Interlocking inserted tooth milling cutters, 8 inches in diameter, are used, the large diameter being necessary because of the height of the casting at the ends.

Where the end thrust on the arbor cannot be equalized, the greatest thrust should be toward the spindle nose. Thus in the above operation, two right-hand angle cutters are used against one left-hand, and the greatest thrust is toward the spindle nose.