Perforated cast-iron or steel block with grooved sides, used by metalworkers for shaping their work by holding it on the work (or the work on it) and striking with a hammer or sledge.
Swage blocks are used in heading bolts and swaging bars by hand.
Perforated cast-iron or steel block with grooved sides, used by metalworkers for shaping their work by holding it on the work (or the work on it) and striking with a hammer or sledge.
Swage blocks are used in heading bolts and swaging bars by hand.
Britannica English dictionary. Английский словарь Британика. 2012