Question
Download Solution PDFIn designing a shaft, hub and key for a system, weakest member taken is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Key:
Key is a metallic piece of a wedge inserted between a shaft and hub, parallel to the axis of the shaft. It is proportionate to the shaft diameter.
- A keyway is a slot or recess in a shaft or hub of the pulley to accommodate a key.
- Key is the weakest member in the assembly of shaft, pulley and key.
- Key acts as a safety device, whenever there is excess load appears on the pulley key fails first and it keeps safer to shaft and pulley.
- It is always inserted parallel to the axis of the shaft.
- Keys are used as temporary fastenings and are subjected to considerable crushing and shearing stresses.
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