Ball-peen hammer

A ball-peen (also spelled pein[1]) hammer, also known as a machinist's hammer, is a type of peening hammer used in metalworking.

A ball-peen hammer

It is classified from a cross-peen hammer, point-peen hammer, or chisel-peen hammer by having a hemispherical head. Though the process of peening has become rarer in metal fabrication, the ball-peen hammer remains useful for many tasks, such as striking punches and chisels. it is a very useful tool that has many purposes in the hammer industry

References
  1. Audel, Theodore (1962), Audels new mechanical dictionary for technical trades, Theodore Audel, p. 54.


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