Wickman 71/4"-6, 71/4"-6D and 9"-4 Parts Manual Wickman 71/4"-6, 71/4"-6D and 9"-4 Multi-spindle Automatics Chucking Machines. Parts Manual as Sectional Drawings. Manufacturers: Wickman Models: 4 4-inch 6 6D 71 9-inch Contents: Parts Manual