DOT Code: 601.281-042, AIMS Code: 0584

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Analyzes variety of specifications, lays out metal stock, sets up and operates machine tools, and fits and assembles parts to fabricate or repair cutting tools, jigs, fixtures, gauges, or machinists' hand tools, applying knowledge of tool design, shop mathematics, metal properties, and layout, machining, and assembly procedures: Studies specifications, such as blueprints, sketches, or tool description, and plans sequence of operations. Measures, marks, and scribes metal stock to lay out work pieces for machining [LAY OUT WORKER (machine shop) 600.281-018]. Sets up and operates machine tools, such as lathe, milling machine, shaper, and grinder to machine parts to specifications, and verifies conformance of machined parts to specifications [TOOL-MACHINE SET-UP OPERATOR (machine shop) 601.280-054)]. Positions and secures parts on surface plate or worktable, using devices such as vises, V-blocks, and angle plates. Fits and assembles parts into assemblies or mechanisms, using hand tools. Verifies dimensions and alignment, using measuring instruments such as micrometers, height gauges, and gauge blocks. Examines standard tools and modifies tools as required. Develops specifications from general description and draws or sketches tool to be fabricated, using drafting tools or computer and software programs. May heat treat tools or parts [HEAT TREATER (heat treating) II 504.682-018]. May be designated according to special materials used as Carbide-Tool Maker (clock & watch); Diamond-Tool Maker (clock & watch). May only repair tools and be designated Tool Repairer (machine shop).

Work Process Schedule

Task Hours
A.Tool Crib & Tool Inspection200
C.Engine Lathe800
E.Internal Grinders400
F.Jig Grinders300
G.Other Grinders400
H.Boring Machine & Jig Bore300
I.Heat Treat100
L.Miscellaneous: machines, bench work, individual assignments, troubleshooting4250
(Every 2,000 hours = one year) Total Hours: 8000

Related Technical Instruction

The Commonwealth of Massachusetts requires 150 hours each year of related technical instruction which must be mastered by the apprentice in order to successfully complete the program. The following is a general listing of instruction topics for this trade. For further information, please call the Division of Apprentice Training at (617) 626-5409.

Instruction Topics

General Math
Tech Math I
Tech Math II
Tech Math III
Blueprint Reading I
Blueprint Reading II
Hydraulics I
Hydraulics II
Jigs & Fixtures I
Jigs & Fixtures II
Physics & Mechanics
Strength of Materials
Manufacturing Processes
Tool Design
Speeds, Feeds, & Gearing
Industrial Psychology
Industrial Economics
Drafting I
Precision Instruments
Electricity I