Manufacturing drawing
Also called: Detail drawing · 2D drawing
A manufacturing drawing is the 2D document with everything the shop needs to make a part: views, dimensions, tolerances, material and finish.
The manufacturing drawing (or detail drawing) is the technical contract between who designs and who manufactures. Even with the 3D model at hand, this is where tolerances, material, heat treatment, finish and the notes defining an acceptable part live.
How it works
A good drawing has enough views and sections to leave no doubt, functional dimensions from the right references, general tolerances (for example ISO 2768-m) plus specific ones where they matter, a title block with material, treatment, scale, units, projection method and revision, and notes on edge breaks, burrs and marking. Together with the STEP file, it lets the shop program and inspect the part with the same understanding.
Practical example
A machine shop receives only the 3D of a bracket and asks: what tolerance on the holes? Which material? Does it need anodizing? With a manufacturing drawing those questions disappear: the quote goes out the same day and the first part comes out right.
Common mistakes
- Dimensioning everything from an arbitrary edge without thinking about function.
- Leaving general tolerance blank, which causes arguments at inspection.
- Sending a PDF without revision or with a different revision than the 3D.
FAQ
If I have the 3D, do I need a drawing?
In most cases, yes. The 3D defines nominal shape; the drawing defines what is acceptable. Some companies use MBD (tolerances in the 3D), but everyone in the chain must be able to read it.
Updated
Related service
Manufacturing documentation
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