ACIERA Types 22 Drilling Machines - 22STA and 22VA. Manual ACIERA Type 22STA and 22VA. Detailed Instruction and Maintenance Manuals with Parts as Exploded Component Drawings. Three editions are included and all have differences in details. Manufacturers: Aciera Models: 22STA 22-STA 22VA 22-VA Contents: Operators Manual Maintenance Manual Parts Manual Catalog