Identify the hammer shown in the following figure:

This question was previously asked in
ISRO SAC Technician B Fitter 21 Oct 2018 Official Paper
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  1. Claw hammer
  2. Cross pein hammer
  3. Ball pein hammer
  4. Sledge hammer

Answer (Detailed Solution Below)

Option 3 : Ball pein hammer
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Detailed Solution

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Explanation:

Hammers:

  • An engineer's hammer is a hand tool used for striking purposes while punching, bending, straightening, chipping, forging, or riveting.
  • Hammer is made of drop-forged carbon steel, while the wooden handle must be capable of absorbing shock.

Specification:

  • An engineer's hammers are specified by their weight and the shape of the pein.
  • Their weight varies from 125 grams to 750 grams.
  • The weight of an engineer's hammer, used for marking purposes, is 250 grams.

Major parts of a hammer:

Face:

  • The face is the striking portion. A slight convexity is given to it to avoid digging off the edge. It is used for striking while chipping, bending, punching, etc.

Pein:

  • The pein is the other end of the head.
  • It is used for shaping and forming work like riveting and bending.
  • The pein is of different shapes such as:
    • ball pein
    • cross pein
    • straight pein

Pein

Cheek:

  • The cheek is the middle portion of the hammerhead.
  • The weight of the hammer is stamped here.
  • This portion of the hammerhead is left soft.

Eyehole:

  • The eyehole is meant for fixing the handle. It is shaped to fit the handle rigidly. The wedges fix the handle in the eyehole.

Hammer1

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