Question
Download Solution PDFAngle of Knuckle thread is ______
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Knuckle thread
- The shape of the knuckle thread is not trapezoid, but it has a rounded shape.
- The angle between two threads is 30°
- It has limited applications.
- It is used for valve spindles, railway carriage coupling, hose connections, etc.
Important Points
Square thread: In this thread, the flanks are perpendicular to the axis of the thread. This is used for transmitting motion or power. E.g. Fly presses, Screw jack, vice handles, cross-slide, lead screw and compound slide, etc.
Trapezoidal threads: These threads have a profile that is neither square nor V thread form and have a form of a trapezoid. Different forms of trapezoidal threads are ACME thread, Buttress thread, Saw-tooth thread, Worm thread
- ACME thread: It has an included angle of 29°.
- Buttress Thread: In this thread, one flank is perpendicular to the axis of the thread and the other flank is at 45°. These threads are used in the power press, carpentry vices, gun breeches, ratchets, etc.
Last updated on Jun 26, 2025
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