WORLD'S LARGEST BORING MILL
SLICES 4 MILES OF STEEL SHAVINGS AN HOUR
Westinghouse East Pittsburgh Works - Speeding production of orders important to national defense, one of the world's largest boring mills is shown machining the frame of a huge waterwheel generator to limits held within four thousandths of an inch, about the thickness of a newspaper page.
This mill is driven by 24 motors, ranging from 300- horsepower down to 2 1/2 horsepower, requiring 600,000 watts of electricity. Its 30-foot turntable weighs 176,000 pounds.
Seen in this image - the high speed steel cutting tool.
Westinghouse ID # 268131
Original Caption by Science Service