Page:Practical Treatise on Milling and Milling Machines.djvu/148

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Surfacing and Milling Edge of Curved Casting on a No. 3 Vertical Spindle Milling Machine

This illustration shows the use of a power-driven circular milling attachment, in connection with a vertical spindle milling machine for milling the surface and edge of a cutter carriage of an automatic gear cutting machine.

The special fixture employed is more for the purpose of milling the outside curved edge of the casting than for the operation shown. It has a way cut to correspond to that on the back of the casting, and an arbor inserted through two holes in the piece and into the centre of the circular milling attachment insures the outer edge being milled concentric with the holes.

All necessary movement is obtained from the circular attachment.