Page:Practical Treatise on Milling and Milling Machines.djvu/127

Rh Milling Steel Block for Parallel Sides

This operation is, apparently, simple enough, but care must be exercised if accuracy is required. The piece is supported on parallels and clamped in a vise. In fastening it one must be careful to be sure that there are no particles of dirt or chips between the parallels and bottom of piece, and that it is tamped down so that it seats properly when the vise is firmly clamped.

A plain milling cutter with spiral teeth is used, as this is best where a finished surface is desired. A cutter with nicked teeth would be better if considerable stock were to be taken off.

The table is fed longitudinally, and it should be noted that lubricant is used upon the cutter.