Set screws are primarily categorized as_________________?
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Answer: C. used to prevent relative motion be-tween parts
Explanation
Set screws are specialized threaded fasteners primarily used to prevent relative motion. They screw through a threaded hub to press firmly against a shaft, locking components together. This prevents gears, pulleys, and collars from slipping or rotating independently on drive shafts. Set screws typically feature headless designs with various internal or external driving drives. Point styles include cup, cone, flat, and dog points to suit different shaft locking needs. Frictional resistance generated by tightening the set screw secures the rotating assembly.
Conveyor roller bearings and small pulleys rely on set screws for secure axial positioning. Electric motor cooling fans use set screws to lock fan hubs onto armature shafts. Assembly technicians ensure proper tightening torque to prevent mechanical slippage during operation. Small tap bolts with various heads are used for general clamping rather than locking hubs. Screws slotted for screwdrivers are general fasteners, not specialized shaft-locking set screws. Studs are threaded rods without heads, differing from set screws designed for motion prevention.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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