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Everything about Roundness

Measure of how closely the shape of an object approaches that of a circle

Roundness is the measure of how closely the shape of an object approaches that of a mathematically perfect circle. Roundness applies in two dimensions, such as the cross sectional circles along a cylindrical object such as a shaft or a cylindrical roller for a bearing. In geometric dimensioning and tolerancing, control of a cylinder can also include its fidelity to the longitudinal axis, yielding cylindricity. The analogue of roundness in three dimensions is sphericity. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: RoundnessA 5-minute orientation
  2. Skim a recent paper: Body Roundness Index and All-Cause Mortality Among US AdultsInfluential work since 2022
  3. Pick up a classic book: A Short History of The English PeopleThe most-reprinted book on the subject
  4. Read the landmark paper: Volume, Shape, and Roundness of Rock ParticlesCited 1,266 times
  5. Go sideways: Geometrical Product Specification and VerificationA closely related topic
  6. Go sideways: Diameter tapeA closely related topic

📖 Definitions

Noun The quality or degree of being round. The degree of accuracy to which a manufactured object intended to be round fulfills that requirement; it is measured by parameters such as TIR (total indicator reading).

Noun The degree of accuracy to which a manufactured object intended to be round fulfills that requirement; it is measured by parameters such as TIR (total indicator reading).

Noun Synonym of rotundity.

🗂️ The subject at a glance

  1. Simple definitions
  2. Calculation in two dimensions
  3. Roundness measurements
  4. Roundness error definitions

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics