Question
Download Solution PDFThe crest diameter of a screw thread is same as _____
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Screw thread is a continuous helical groove of specified cross-section produced on the external or internal surface. A screw thread formed on a cylinder is known as straight or parallel screw thread, while screw thread formed on a cone or frustum is known as the tapered screw thread.
Crest: Crest of the thread is the top most surface joining the two sides.
Root: Root of the thread is the bottom of the groove between the two flanks.
Pitch: Pitch of a thread is the distance measured parallel to the axis from a point on a thread to the corresponding points on adjacent thread forms in the same axial plane and on the same side of the axis.
Major diameter: It is an imaginary largest diameter of the thread which would touch the crests of an internal or external thread. It is also called crest diameter.
Minor diameter: It is an imaginary smallest diameter of the thread which would touch the roots of an external thread.
Pitch diameter: It is a theoretical diameter between the major and minor diameter of screw threads.
Last updated on May 28, 2025
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