Operating at pressures ranging from 50 to 125 psi, the Danair Aerosmith hammer delivers up to 1,000 hammer blows per minute. During the early production phase finish machining exposed casting porosity and the cast iron air grille vents frequently broke during service....
When the AKZO Salt Company had problems getting roof-bolt wedge anchors from its malleable-iron foundry supplier, it opened the door for zinc alloy. Mine management set out to find an alternative source for these vital parts, but they were unable to find another...