Identify the gear in the given figure.

F2 Madhuri Engineering 28.07.2022 D6

This question was previously asked in
NHPC JE Mechanical 6 April 2022 (Shift 2) Official Paper
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  1. Spiral gear
  2. Herringbone gear
  3. Bevel gear
  4. Zero bevel gear

Answer (Detailed Solution Below)

Option 2 : Herringbone gear
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Detailed Solution

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Explanation:

Herringbone Gear:

  • If the left and right inclinations of a double helical gear meet at a common apex and there is no groove in between, the gear is known as herringbone gear.
  • Axial thrust gets canceled due to the opposite hands and these gears can be used at high speeds with less noise.

F1 Ashik Madhu 17.09.20 D8

 

Bevel Gear: 

  • Bevel gears are used to transmit motion between shafts at various angles to each other. 
  • The teeth profile may be straight or spiral.

bevel

 

Spiral bevel gear:

  • Spiral bevel gears are used to connect two intersecting shafts. Spiral bevel gears have teeth inclined at an angle to the face of the bevel.
  • Spiral gears have a spiral angle of 35° usually and the pressure angle varies from 14.5° to 20°.
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