Duties and tasks

• Positioning, securing and measuring metal stock or castings to lay out for machining
• Making and repairing metal patterns for preparation of foundry moulds
• Repairing and modifying sports guns and other small arms
• Visualizing and computing dimensions, sizes, shapes and tolerances of assemblies, based on specifications
• Preparing templates and sketches, and determining work processes
• Laying out lines and reference points on metal stock to guide other workers who cut, turn, mill, grind or otherwise shape metal
• Making, fitting, assembling, repairing and installing lock parts and locks
• Fitting and assembling parts to make and repair jigs, fixtures and gauges
• Reading and interpreting engineering drawings and specifications of tools, dies, prototypes or models
• Setting up, operating and maintaining conventional and computer numerically controlled machine tools to cut, turn, mill, plane, drill, bore, grind or otherwise shape workpieces to prescribed dimensions and finish
• Verifying dimensions, alignments, and clearances of finished parts for conformance to specifications, using precision measuring instruments and testing completed items for proper operation