Roymech engineering encyclopedia

Engineering Drawing Notes




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What are engineering drawing notes?
Engineering drawing notes provide essential instructions and specifications for manufacturing, fabrication, machining and assembly processes on technical drawings.

The notes below are representative. The actual notes used will be selected based on the information being shown on the drawing

General Notes on Engineering Drawings

Engineering drawing notes define the requirements needed to manufacture and assemble components correctly. They include general instructions, fabrication details, machining requirements, and fastener specifications used across engineering drawings.


Drawing notes are used to communicate critical information that cannot be easily shown graphically. They ensure consistency, reduce ambiguity, and provide clear instructions for production and inspection processes.

Fabrication Notes and Requirements


Machining Notes and Specifications


Fastener Notes and Standards




Clear and accurate drawing notes are essential for ensuring correct manufacturing processes, reducing errors, and maintaining quality in engineering production.


Frequently Asked Questions

What are drawing notes used for?

Drawing notes provide instructions for manufacturing, assembly, and inspection that are not shown directly on the drawing.

What types of drawing notes are there?

Common types include general notes, fabrication notes, machining notes, and fastener notes.

Why are general notes important?

General notes apply to the entire drawing and ensure consistent interpretation of specifications and standards.

What are machining notes?

Machining notes define tolerances, surface finishes, and processes required to produce a component.

What are fabrication notes?

Fabrication notes provide instructions for welding, forming, and assembling components.


See Also


Links Providing information on Welding Symbols on Drawing
  1. Volvo Drawing Standards......For access to document 101-0005 on European-Standard-based drawing procedures
  2. Volvo Weld Symbols/Procedures.....For access to document 180-0001 on European-Standard-based Weld Symbols
  3. Engineering Drawing and CAD-Plymouth Uni...A very comprehensive site Excellent source of basic draughting information