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The electrodes for the Proof-of-Prlnclple (pOP) Radio-Frequency Quadruple (RFIJ)accelerator were machined on a numerically controlled, three-axis, vertical mill. These pole tips, or vanes, were prepared for, and used, in the successful demonstration of RFQ practicality at Log Alamos National Laboratory In February, 1980. The data set that described the vanes contained about 10mlllion bits of tool position data. The vanes werecut from OFHC copper blanks. The tolerances achieved were approxi-mately+ 0.005 cm. The design and manufacturing procedures-are described.