Drafter, Mechanical

DOT Code: 007.281-010

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Description

Drafts detailed drawings of machinery and mechanical devices, indicating dimensions and tolerances, fasteners and joining requirements, and other engineering data: Reviews rough sketches and engineering specifications received from engineer or architect. Drafts multiple‑view assembly, subassembly, and layout drawings as required for manufacture and repair of machines and equipment. Prepares working plans and detail drawings from rough or detailed sketches and notes for engineering or manufacturing purposes according to dimensional specifications: Calculates and lays out dimensions, angles, curvature of parts, materials to be used, relationship of one part to another, and relationship of various parts to entire structure or project, utilizing knowledge of engineering practices, mathematics, building materials, manufacturing technology, and related physical sciences. Creates preliminary or final sketch of proposed drawing, using standard drafting techniques and devices, such as drawing board, T-square, protractor, and drafting machine, or using computer-assisted design/drafting equipment. Modifies drawings as directed by engineer or architect.

Work Process Schedule

TaskHours
A.Making Blueprints and other Reproductions500
B.Filing Tracings and Related Materials400
C.Lettering Drawings by Hand400
D.Use of Drawing Instruments200
E.Tracing on Paper and Cloth250
F.Free Hand, Geometric, Isometric Sketches and Drawing500
G.Study of Final Design Drawings700
H.Transcriptions of Recommended Detail Changes to Sketches250
I.Preliminary Drawings of Mechanical Features200
J.Plot Plans, Sections and Elevations350
K.Preparation of Details for Shop Fabrication2500
L.Preparation of Bills of materials and Familiarization with Material Specifications750
 Making Materials off Final Design Drawings in Complete Accord with Specifications and Listing all shop and field Operations Pertaining thereto for Estimating Total Cost of Mechanical Contracts750
N.Checking Manufactured Drawings of Related Equipment for Clearances and Correctness250
(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. For further information, please call the Division of Apprentice Training at (617) 626-5409.

Firsy Year
Hand Book
Manufacturers Drawing
Basic Mathematics
Eng. Material and Processes
Shop Theory

Second Year
Algebra
Industrial Economics
Jib and Fixture Design Study
Shop Theory

Third Year
Die Design Study
Geometry
Mechanics (Material, Force and Energy)
Trigonometry
Casting Design Study
Social Economics

Fourth Year
Gearing
Industrial Relations
Descriptive Geometry (Projections, Panel Tipping and Air Foils)
Mechanisms (Mach. Layout)
Mechanics (Fluid and Heat)