Page:Practical Treatise on Milling and Milling Machines.djvu/203

Rh Milling Tenon on Collet

A taper plug having a centre hole at the large end is driven into the hole in the collet, which is then mounted on the spiral head centres. A dog on the taper plug locks the collet to the spiral head spindle.

An end mill is used and the cutting is done with the teeth on the periphery. The rapid index plate is used to index the work and the table is fed longitudinally.

The table feed trip dog is set to insure milling both sides to the same length.

If a quantity of this work is to be done, formed straddle mills would be employed with an entirely different arrangement.