Power screw thread forms: friction and strength comparison Assess the statement: Square threads are not as strong as V-threads, but they offer less frictional resistance than Whitworth threads. Decide whether the statement is correct.
Mechanical Engineering
Machine Design
Difficulty: Easy
Choose an option
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ATrue — the statement is correct
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BFalse — square threads are stronger and have higher friction
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CFalse — Whitworth threads have lower friction than square threads
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DCannot be concluded without pitch and diameter
Answer
Correct Answer: True — the statement is correct
Explanation
Concept• Square threads have zero flank angle → lowest friction among common forms, but less root strength compared to V/Whitworth because of a smaller shear area.• Whitworth (V) threads (55°) have higher friction due to the included angle and normal force components on the flanks.
ConclusionThe statement matches standard design comparisons.
Final AnswerTrue — the statement is correct