Sub-sow block (die holder)
A The forging operation in which metal is progressively formed to general desired shape and contour by means of an impression die (used when only one block operation is scheduled). used as an adapter in order to permit the use of Forms for making forgings; they generally consist of a top and bottom die. The simplest will form a completed forging in a single impression; the most complex, consisting of several die inserts, may have a number of impressions for the progressive working of complicated shapes. Forging dies are usually in pairs, with part of the impression in one of the blocks and the rest of the impression in the other block.... More that otherwise would not have sufficient height to be used in the particular unit or to permit the use of The metal blocks into which forging impressions are machined and from which forgings are produced. in a unit where the shank sizes are different.