What is the term for a key formed from a cylindrical disc with a segmental cross-section______________?
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Answer: A. wood-ruff key
Explanation
A Woodruff key is formed from a cylindrical disc with a segmental semicircular cross-section. Its unique shape allows it to self-align in a matching curved shaft keyway. The segmental profile prevents shearing under moderate torsional loads in rotating assemblies. Keys are mechanical components placed between shafts and hubs to transmit torque. The Woodruff key design was developed to eliminate deep milling cuts in drive shafts. Semicircular key seats allow the key to rock slightly, accommodating minor hub misalignments.
Automotive crankshafts and tapered gear shafts frequently utilize Woodruff keys for timing gears. Electric motor drives use these keys to secure pulleys and flywheels to drive shafts. Mechanical engineers select key types based on torque transmission and ease of shaft machining. A feather key is a parallel sliding key allowing axial movement of the mounted hub. A flat saddle key relies purely on friction without cutting a deep slot into the shaft. A gib head key features a tapered wedge shape with a head for easy removal.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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