Engineering Drawing Special Views - Section Views - Full, Half, Offset, Broken Out (Local), Revolved - Conventional Rotation - Hole Feature Callouts

Oct 29, 2026

Engineering Drawing Special Views - Section Views provides clear guidance for creating sectional representations of parts and assemblies. It explains how section views reveal internal features, convert hidden lines to visible solid lines, and support dimensioning of internal geometry, with explicit warnings not to dimension hidden lines. The material covers cutting plane line conventions using capped arrowheads and letter labeling, hatched section lines including default cast iron patterns and spacing rules, and assembly section view alignment. It further covers full, half, offset, and broken-out (local) sections, including when the cutting plane may be omitted, plus conventional rotation and hole feature callouts, including symbolic hatching concepts.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages24

Reading Time1 h 0 min

AccessFree to download

Section Views

Full, Half, Offset, and Broken-Out (Local) Sections

Cutting Plane Lines and Labeling (A, B, etc.)

Section Line Hatching (Cast Iron Default)

Webs, Ribs & Spokes in Sections

Conventional Rotation

Hole Feature Callouts

Engineering Drawing Special Views – Section Views • Full • Half • Offset • Broken Out (Local) • Revolved – Webs, Ribs & Spokes in Sections – Conventional Rotation – Hole Feature Callouts Sections Section views, are used: – To clearly show the internal features of a part or assembly* – To convert hidden lines to solid lines* – When there is a need to dimension internal features* (Never, Never, Never Dimension to Hidden Lines!!) Cutting Plane Lines – Cutting Plane Lines represent the cutting plane through apart* – The cutting plane line is capped on the ends with arrowheads that show direction of sight of the sectional view* – The cutting plane line and related sections should be labeled with letters beginning with “A” in the first section view of the drawing set,“B”for the second, Etc. – Hatching is added where the view is cut* * * Hatching* * Section Lines/Lining (Hatching) – Section Hatching are thin lines used in the view of the section to show where the cutting-plane line has cut through the material (“Where the saw made noise”) • The General Use or Default hatch material is “Cast Iron” * • Usually drawn at a 45°angle equally spaced 1/8 inch • ( alternative angles: 30°,60°) • Never draw horizontal or vertical • Assembly Section Views: – Draw at opposite angles on adjacent assembly components – Larger components have larger spacing Symbolic Material Hatching Full and Half Sections – Full Sections remove half of the part – The Cutting Plane* line is always shown Half Section Views – Half Section views remove ¼ of the part* – Generally used on symmetricallyshaped parts – Creates a convenient“Inside Outside”View – The cutting plane can be omitted if the section view is directly projected Offset Sections – Offset Section views bend the cutting plane at right angles to pass through the desired internal features* – The cutting plane line is always shown Broken-Out (Local) Sections – Broken-out sections are used to show certain internal features of a part without drawing another view* – The cutting plane is usually not shown – The desired section area is simply “Torn” away – The depth of the section is assumed to be the center of the part unless otherwise indicated Broken-Out (Local) Sections

FAQs

What is the purpose of section views in engineering drawing?

Section views are used to clearly show internal features of a part or assembly, convert hidden lines to solid lines, and support dimensioning of internal features. The document also warns against dimensioning hidden lines.

How should cutting plane lines be drawn and labeled for section views?

Cutting plane lines represent the cutting plane through the part and are capped at both ends with arrowheads to indicate the sight direction. Section sets should label the cutting plane and related sections with letters starting from “A” for the first view, “B” for the second, and so on.

What are the rules for section hatching (lining) and the default material pattern?

Hatching uses thin section lines in the view where the cutting plane cuts through material. The general default hatch material is “Cast Iron,” typically drawn at a 45° angle with equally spaced 1/8 inch lines, with alternative angles such as 30° and 60°, and it must not be horizontal or vertical.

Oct 29, 2026

Upload by Syukur Setiap Hari