Page:Practical Treatise on Milling and Milling Machines.djvu/213

Rh Planing on a Milling Machine

This illustration shows a comparatively unusual operation on the milling machine. Planing can be done on any milling machine by clamping the spindle and moving the table by hand; but on our constant speed drive machines, the spindle can be clamped and the power feeds for longitudinal movement of table are still available.

The special device for clamping the spindle consists of a split ring that fits on the nose of the spindle, over which a bracket is clamped to the column. A bevel sleeve contained in the bracket closes the split ring on the spindle when the three bolts are tightened.

A fly tool is used, and if power feed is utilized, the table is usually fed at its fastest feed. The work is fed upward or transversely by means of the vertical transverse or hand feeds—often both are employed.