17 results found that include 54 products. Find a variety of high-quality air hammer options at Grainger. General-duty and industrial-grade air hammers can help provide fast and easy metal forging and fabricating. These pneumatic tools use compressed air to help drive into a workpiece to help shape, mark or smooth it. Choose a rugged air chipping hammer to help break up concrete.
besieging - the action of an armed force that surrounds a fortified place and isolates it while continuing to attack. beleaguering, military blockade, siege. blockade, encirclement - a war measure that isolates some area of importance to the enemy.
The Bessemer method converts molten pig iron into steel in a squat, egg-shaped bowl. Blasts of cold air are blown through the liquid metal via perforations in the bowl's base. The air burns off excess carbon and other impurities. When the iron is nearly purified, more carbon might be added. Finally the bowl is tilted down and the newly made steel poured into a ladle ready to cast into ingot moulds. The Bessemer process was simple but the visual effect was extraordinary.