Page:Practical Treatise on Milling and Milling Machines.djvu/126

120 Milling T Slot in a Table

Milling a T slot consists, as we have already explained in Chapter VI, of two separate operations. A straight slot is first milled to the full depth with a plain milling cutter, which is $1⁄2$ '' wide in this case. The work is then turned on edge and clamped to knees so that it is square with the spindle. It is leveled by means of a surface gauge or height gauge, measuring from the straight slot to the top of the table.

A standard $1⁄2$ '' T slot cutter is used, and the table is fed longitudinally in the path of the straight slot.

This job can be done to good advantage on a vertical spindle machine, or with a vertical spindle attachment, using a two-lipped end mill and T slot cutter.