A key made from a cylindrical disc having segmental cross-section, is known as

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SSC JE ME Previous Paper 20 ( Held on: 4 March 2017 Morning)
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  1. wood-ruff key
  2. feather key
  3. flat saddle key
  4. gib head key

Answer (Detailed Solution Below)

Option 1 : wood-ruff key
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Explanation:

The woodruff key is an easily adjustable key. It is a piece from a cylindrical disc having segmental cross-section. This key is largely used in machine tool and automobile construction.

A key attached to one member of a pair and which permits relative axial movement is known as feather key. It is a special type of parallel key which transmits a turning moment and also permits axial movement.

A flat saddle key is a taper key which fits in a keyway in the hub and is flat on the shaft. A hollow saddle key is a taper key which fits in a keyway in the hub and the bottom of the key is shaped to fit the curved surface of the shaft.

Gib-head key is a rectangular sunk key with a head at one end known as gib head. It is usually provided to facilitate the removal of key.

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