Translate design intent into manufacturing requirements.
Manufacturing drawings and specifications communicate the geometry, dimensions, tolerances, materials, finishes, inspection requirements, revision status, and technical expectations needed to manufacture a part consistently.
A production drawing should answer the questions that determine
Geometry
Views, sections, details, profiles, digital models, reference geometry, and feature definitions communicate the shape of the part.
Dimensions
Dimensions define size, location, spacing, thickness, diameter, depth, angle, and relationships between product features.
Tolerances
Tolerance limits communicate the permitted manufacturing variation required for fit, function, interchangeability, and assembly.
Material
Specify grade, alloy, resin, temper, hardness, condition, form, certification, or approved alternatives where relevant.
Finishes
Plating, anodizing, paint, coating, polishing, passivation, heat treatment, texture, color, or other secondary requirements can be documented.
Notes & Standards
General notes can define deburring, edge conditions, inspection, cleanliness, marking, specifications, packaging, and other requirements.
Fits, seals, bearings, locating features, alignment surfaces, and mating assemblies may require tighter control than nonfunctional geometry.
Machining, molding, casting, stamping, welding, forming, and additive processes produce different normal levels of variation.
Several individually acceptable dimensions can combine into an unacceptable final assembly if their cumulative variation is not evaluated.
Critical requirements should be measurable using practical datums, gauges, inspection equipment, and production methods.
Tight tolerances can increase cycle time, setup, special processing, scrap, inspection, and supplier cost without improving function.
Engineering changes should create a clear relationship between the current drawing, digital model, purchase order, tooling, inspection plan, work instructions, inventory, and supplier production records.
Drawing vs Model
Confirm that dimensions, geometry, hole patterns, revisions, and features agree between the drawing and supplied CAD model.
Material Definition
Avoid vague descriptions when grade, condition, certification, or substitute restrictions affect product performance.
Inspection Requirements
Identify critical characteristics, first-article expectations, test requirements, records, or customer approval where needed.
Supplier Questions
Resolve manufacturing questions before quote assumptions become tooling, programming, material purchases, or finished production.
Combine the technical files with quantity, schedule, tooling, quality, packaging, and commercial requirements in a controlled RFQ.
Manufacturing RFQ Process →